Dorado Castaño, Antonio David
Total activity: 72
Areas of expertise
Biofiltration
h index
6
Professional category
Tenure-track 1 lecturers
Doctoral courses
Natural Resources and Environment
University degree
ENG. INDUST.-QUÍMICA
Research group
ERNMA - Engineering of the Natural Resources and Environment
Department
Department of Mining Engineering and Natural Resources
School
Manresa School of Engineering (EPSEM)
E-mail
toni.doradoupc.edu
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Orcid
0000-0003-0238-5867 Open in new window
Scopus Author ID
24314731100 Open in new window
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Biofiltration BTF-GO Open in new window

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1 to 50 of 72 results
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    Mathematical modeling to optimize control strategies in an industrial biotrickling filter for biogas sweetening  Open access

     Canal, C.; Prades Martell, Lledo; Gamisans Noguera, Javier; Dorado Castaño, Antonio David
    Mediterranean Congress of Chemical Engineering
    p. 362
    Presentation's date: 2014-09-30
    Presentation of work at congresses

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    Burning biogas in a combined heat and power (CHP) plant is a promising option to reduce the emissions and the operational cost of a WWTP. However, the biogas generated in anaerobic digestion facilities in WWTPs contains average concentrations of H2S in the range from 0.1 to 0.5 vol.% which has to be removed to avoid corrosion, unnecessary production of by-products, and SO2 emissions. In a biotrickling filter (BTF), the H2S is absorbed and removed in a packed column where biomass is immobilized, being a liquid phase continuously recirculated from the bottom of the reactor. Advances in mathematical modelling of biofilters have allowed improving the knowledge of the phenomena and interactions involved in the biological desulfurization of biogas (Almenglo et al. 2013). The principal limitation for the long term operation of BTF in biogas sweetening is the accumulation of elemental sulphur due to oxygen mass transfer limitations. Apart from reducing the removal efficiency, this accumulation increases pressure drops, thus it increases the operation cost to blow the air through the bed, and force frequent maintenance tasks to replace or wash the packing material. In the present study, the dynamic model developed and validated by Rodriguez (2013) has been used to evaluate different control strategies and optimize the performance of a BTF located in the WWTP of Manresa (Barcelona). Particularly, the use of different kind of packing materials (organic and inorganic) has been evaluated to determine in different operation conditions which removal efficiency (RE) and sulphur accumulation could be expected, i.e time period of operation before the forced shutdown. Additionally, an optimal distribution of different particle sizes of materials has been proposed to reduce sulphur rate production, affecting minimally the abatement efficiencies currently obtained.

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    Microrespirometry as an effective technique for monitoring biomass growth and activity in chalcopyrite bioleaching processes  Open access

     Benzal Montes, Eva; Morral Moltó, Eloi; Guimera Villalba, Xavier; Gamisans Noguera, Javier; Sole Sardans, M. Montserrat; Dorado Castaño, Antonio David
    Mediterranean Congress of Chemical Engineering
    p. 228
    Presentation's date: 2014-09-30
    Presentation of work at congresses

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    Bioleaching is a technology that uses specific bacteria to extract valuable metals from minerals. The advantages of this technique over traditional methods (chemical leaching) include low cost, high efficiency and environment friendliness. Bioleaching allows to recovers metals from low grade ores at conditions where traditional techniques are not efficient and then, mining waste can be valorized and the impact on the environment is reduced. Chalcopyrite (CuFeS2) is the most abundant of the copper sulfides but at the same time, it is the most refractory too. The main microorganisms involved in the bioleaching of sulfide minerals are iron- and sulfur-oxidizing bacteria (Rawlings 2002). In the bioleaching process the ion Fe3+ plays an important role since it assists the process oxidizing the ore (Dorado et al. 2012). As a result, ferric iron is reduced to ferrous iron and then, the bacteria catalyze the cyclic regeneration of ferrous to ferric to promote continuous leaching of the sulfide mineral. However, Fe3+ ions have a low solubility and they can lead to the precipitation of iron (III) hydroxides and other ferric complexes such as jarosite, depending on the impurities of the mineral and the mineral medium used to keep the biological activity. The precipitation affects negatively the mass transfer process and it causes the decrease in the extraction yield of the metal (Zhang et al. 2008). Moreover, the presence of precipitates makes the optical methods of monitoring not suitable for controlling the process. In this case, the use of microrespirometry allows the monitoring of biomass growth by means of low sampling volume (<1mL) and high precision. Additionally, negative effects over the activity of microorganisms can be detected immediately and corrected. In this work, the microrespirometry was used to evaluate the effect of the mineral medium composition in the bioleaching of copper from a chalcopyrite ore. The microbial consortium was obtained from a biotrickling filter treating high loads of H2S and the copper extraction efficiency was monitored by atomic absorption. As an example, Figure 1 shows the evolution of the respirometric rates at different moments along the experiment.

  • Exploring sulfur-oxidizing biofilms in a gas-phase flat-plate bioreactor under controlled ph

     Prades Martell, Lledo; Guimera Villalba, Xavier; Gabriel, D.; Dorado Castaño, Antonio David; Gamisans Noguera, Javier
    Mediterranean Congress of Chemical Engineering
    p. 356
    Presentation's date: 2014-09-30
    Presentation of work at congresses

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    Biological removal of hydrogen sulfide (H2S) with biotrickling filters has become a good economic alternative to traditional physical-chemical methods used for treating air emissions (Kim and Deshusses, 2005). However, although the technology has been widely tested, there is a lack of knowledge in the degradation phenomena taking place within biofilms. Therefore it is essential to conduct studies to monitor biofilm and clarify its role in the process of biofiltration in order to optimize this technology. To carry out studies at laboratory-scale, biofilms growth in industrial reactors may be reproduced by constructing and operating suitable laboratory biofilm reactors. In the design of such experimental set-ups, it should be considered the type of reactor, the biological process to be developed and the necessary measurements in the study of biofilms (Lewandowski and Beyenal, 2007). In this work a gas-phase flat-plate (GPFP) bioreactor was used to grow sulfur-oxidizing biofilms under similar conditions to those found in industrial biotrickling filters applied to the biological sweetening of biogas.

  • Development of a multi-analyte microelectrode array sensor for biofilm profiling

     Guimera Villalba, Xavier; Moya, A.; Dorado Castaño, Antonio David; Gabriel, D.; Gabriel, G.; Gamisans Noguera, Javier
    Mediterranean Congress of Chemical Engineering
    p. 373
    Presentation's date: 2014-09-30
    Presentation of work at congresses

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    The multiple advantages offered by biofiltration techniques have caused a growing interest in their development, becoming an alternative to conventional waste-water and waste-gases treatment processes. In both biofilters and biotrickling filters, pollutants are removed being transferred from a gas or liquid phase to a biofilm formed by bacteria growing in a supporting bed. Pollutants are degraded by the bacteria inside biofilm, which gives to biofilms a predominant role in biofiltration technologies. However, the impossibility of performing measurements inside biofilms hinders the optimization of such equipment since only bulk gas and liquid phases measurements are available. The technical difficulties for obtaining measurements within biofilms have been solved by the development of microsensors. In recent years microsensors have become a useful tool for performing measurements of different chemical species within biofilms with a high spatial and temporal resolution and minimum disturbances. Among the different microsensors available for biofilm monitoring, Clark-type ones are the most commonly used. However, these sensors are handcrafted from pulled glass Pasteur pipettes and, thus, present important drawbacks (Wu et al. 2005). Main limitations are the fragility and high cost per device, the sensitivity variability between different probes and the fact that they are limited to a single analyte. Microfabrication techniques allow advancing in the biofilm profiling approach. This technology enable the design of tailored microelectrodes adapted to the application, thus allowing the microfabrication of electrodes (and their arrays) of different sizes, geometries and arrangements for the monitoring of different species. Furthermore, the cost-effectiveness and mass-production of the microsensors fabricated using the microfabrication techniques makes them a clear and promising alternative for biofilm monitoring.

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    Biofilm oxygen profiling using an array of microelectrodes on a microfabricated needle  Open access

     Moya, A.; Guimera Villalba, Xavier; del Campo, F.J.; Prats-Alfonso, E.; Dorado Castaño, Antonio David; Baeza Labat, Mireia; Villa, R.; Gabriel Buguña, David; Gamisans Noguera, Javier
    Eurosensors
    p. 1-4
    Presentation's date: 2014-09-07
    Presentation of work at congresses

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    Knowledge of bacterial activity inside biofilms is key to the optimization of applied biotechnologies. A novel dissolved oxygen microelectrode array (DO-MEA) sensor has been designed and fabricated on a needle using microelectromechanical systems technology, in order to provide a multipoint, simultaneous dissolved oxygen snapshot profile inside a biofilm. The sensor consisted of eleven gold disk electrodes with integrated counter (CE) and pseudo-reference (RE) electrodes. Three different sensor designs are fabricated, and their responses are fully characterized and evaluated under different environmental conditions. The developed sensor is validated against a commercial Clark-type microelectrode overcoming its drawbacks, by profiling a heterotrophic biofilm cultivated in a flat-plate bioreactor. The DO-MEA sensor will be improved with the protection of the electrodes and will be fabricated on a thinner substrate, for becoming a powerful tool for the research of many similar biological-based processes and applications.

  • Elaboración de materiales docentes interactivos aplicados a la experimentación en bioingeniería

     Bonsfills Pedros, Ana; Dorado Castaño, Antonio David; Gamisans Noguera, Javier; Lao Luque, Concepcion; Sole Sardans, M. Montserrat
    Congreso de Innovación Docente en Ingeniería Química
    p. 38
    Presentation's date: 2014-01-24
    Presentation of work at congresses

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  • Eliminació de H2S mitjançant biofiltres percoladors: millora de la transferència d'oxigen.  Open access

     Rodriguez Mary, Ginesta
    Universitat Politècnica de Catalunya
    Theses

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    En l¿actual context de crisi energètica i canvi climàtic, l¿aprofitament energètic del biogàs ha guanyat rellevància, donat que s¿obté energia a partir dels residus i, alhora, es minimitza l¿emissió de metà a l¿atmosfera. Tanmateix, el biogàs conté entre 0.1-0.5 % v/v de H2S (1000¿5000 ppmv), el qual ha de ser eliminat per tal d¿aprofitar energèticament el biogàs, ja que, a part de desprendre una forta olor desagradable, al cremar és convertit en espècies altament corrosives, perjudicials per la salut i el medi ambient, com són els òxids de sofre i l¿àcid sulfúric. En aquest sentit, els tractaments biològics han demostrat ésser molt competitius enfront les tècniques fisicoquímiques, ja que no requereixen l¿addició de reactius, aprofitant el metabolisme dels microorganismes per tal d'oxidar els possibles contaminants.La transferència de l¿oxigen a la fase aquosa és un factor clau per al correcte funcionament dels biofiltres percoladors, ja que per cada mol de sulfur d¿hidrogen que es degrada són necessaris dos mols d¿oxigen. En condicions de dèficit d¿oxigen a la fase líquida, la reacció d'oxidació no es completa, i s¿acumula sofre (producte intermedi) al material de rebliment de l¿equip. El sofre és un sòlid pastós i, per tant, la seva acumulació augmenta els costos d¿operació. Eventualment, si no es duu a terme una acció correctora, pot arribar a obturar totalment el biofiltre.S¿ha estudiat el procés de biofiltració operant un biofiltre a escala industrial, que permet eliminar entre 2000-2500 ppmv de H2S amb un cabal de gas mitjà de 80 m3 h-1. La reducció del pH d¿operació en 0.8 unitats ha reportat una reducció del 78 % del consum d¿aigua, que s¿usa per a la regulació del pH. S¿ha comprovat la viabilitat de l¿oxidació biològica de part del sofre acumulat a l¿equip, eliminant el 40 % del sofre acumulat a l¿equip en 21 dies.En el present estudi es proposa l¿ús de dispositius intensius d¿aeració, com són els dispositius venturi, per tal de poder subministrar la quantitat necessària d¿oxigen per maximitzar la formació de sulfat. Aquest és posteriorment eliminat de l¿equip mitjançant purgues de la fase líquida. Per a aquest fi s¿han estudiat tres dispositius d¿aeració comercials: un difusor de membrana, un ejector venturi i un jet venturi, en condicions d¿operació similars a les que es donen en la biofiltració del sulfur d¿hidrogen. S¿han realitzat experiments en condicions similars a les que es donen en la biofiltració del sulfur d¿hidrogen present al biogàs: pressió superior a l¿atmosfèrica i presència de sulfat a la fase líquida. També s¿ha estudiat l¿efecte de la configuració del venturi, realitzant mesures de pèrdua de càrrega al llarg del dispositiu. Amb el difusor de membrana s¿ha determinat l¿efecte d¿addicionar una fase no aquosa, per tal de maximitzar la transferència d¿oxigen, i l¿ús d¿oxigen pur enlloc d¿aire.L¿equip que ha estat seleccionat, degut a la seva idoneïtat en base al seu consum energètic i l¿eficàcia en la transferència d¿oxigen, ha estat el jet venturi. Aquest dispositiu ha estat implementat en un biofiltre a escala industrial, reportant una millora en la conversió a sulfat del 32 %, amb una reducció del subministrament d¿aire del 78 %. L¿operació del biofiltre amb el jet venturi s¿ha traduït en una millora en la robustesa del sistema, ja que operant amb aquest dispositiu quan la càrrega d¿entrada disminueix s¿oxida parcialment el sofre acumulat a l¿equip, mentre que amb el compressor, quan disminuïa el cabal de biogàs a tractar es parava l¿entrada d¿aire, empitjorant els problemes d¿acumulació de sofre.Finalment, s¿ha desenvolupat un model matemàtic que permet predir la formació de sofre i sulfat, fet que no havia estat reportat fins al moment. Aquest model ha estat ajustat i validat per dos biofiltres: un a escala laboratori i un a escala industrial. S¿ha obtingut un ajust satisfactori de les dadades experimentals i les simulades.

    In the current energy crisis and climate change context, energy use of biogas has gained relevance, since it is possible to get energy from waste, and also minimizes the emission of methane into the atmosphere. However, biogas contains between 0.1-0.5% v / v H2S (1000-5000 ppmv), which must be removed in order to produce energy because, apart from producing a strong odor, its combustion mighty generate highly corrosive species, harmful to health and the environment, such as sulfur oxides and sulfuric acid. In this sense, biological treatments have proved to be very competitive when compared to physicochemical techniques, since they do not require the addition of reagents, using the metabolism of microorganisms to oxidize potential contaminants. Oxygen transfer to the aqueous phase is key to the proper operation of biotrickling filters, since for each mole of hydrogen sulfide degraded two moles of oxygen are required. Under conditions of oxygen deficit in the liquid phase, the oxidation reaction is not complete, thus accumulating elemental sulfur (an intermediate product) in the filter packing material. Sulfur is an insoluble pasty solid and, therefore, its accumulation increases operating costs. Eventually, if corrective actions are not scheduled, the biofilter can become completely clogged. The biofiltration process of an industrial scale biotrickling filter, which eliminates between 2000-2500 ppmv H2S at a gas flowrate of 80 m3 h-1 has been studied. The reduction of 0.8 pH units in the operation reported a 78% reduction in water consumption, which is used to regulate the pH. The viability of the biological oxidation of sulfur accumulated on the computer was checked, eliminating 40% of the sulfur accumulated on the packed bed in 21 days. This study proposes the use of intensive aeration equipment such as venturi devices, in order to supply the necessary amount of oxygen to maximize the formation of sulfate. Sulfate is finally removed from the biofilter by purging the liquid phase. For this purpose, three commercial aeration devices have been tested: a membrane diffuser, a jet-venturi and an venturi-efector operating at conditions similar to those usually found in biofiltration of hydrogen sulfide. Experiments were carried out under conditions similar to those that occur in biofiltration of hydrogen sulfide present in biogas: pressure greater than atmospheric pressure and the presence of sulfate in the liquid phase. Also, the effect of venturi configuration was tested by measuring the pressure drop along the device. With the diffuser membrane the effect of adding a non-aqueous phase in order to maximize oxygen transfer and the use of pure oxygen instead of air was studied. An intensive gas-liquid contactor (jet-venturi) was selected based on its energy consumption and efficiency in oxygen transfer. This device was implemented in an industrial scale biotrickling filter, reporting an improved conversion to sulfate (32%), with a 78% reduction of air supply. The operation of the biofilter with the jet-venturi resulted in an improvement in robustness and reliability of the desulfurizing system. Finally, a mathematical model that predicts the formation of sulfur and sulfate was developed. This rigorous model approach had not been reported until now. The model was calibrated and validated in two biofilters: a lab-scale and an industrial scale. A satisfactory fitting of the experimental and simulated data was obtained.

    En l’actual context de crisi energètica i canvi climàtic, l’aprofitament energètic del biogàs ha guanyat rellevància, donat que s’obté energia a partir dels residus i, alhora, es minimitza l’emissió de metà a l’atmosfera. Tanmateix, el biogàs conté entre 0.1-0.5 % v/v de H2S (1000–5000 ppmv), el qual ha de ser eliminat per tal d’aprofitar energèticament el biogàs, ja que, a part de desprendre una forta olor desagradable, al cremar és convertit en espècies altament corrosives, perjudicials per la salut i el medi ambient, com són els òxids de sofre i l’àcid sulfúric. En aquest sentit, els tractaments biològics han demostrat ésser molt competitius enfront les tècniques fisicoquímiques, ja que no requereixen l’addició de reactius, aprofitant el metabolisme dels microorganismes per tal d’oxidar els possibles contaminants. La transferència de l’oxigen a la fase aquosa és un factor clau per al correcte funcionament dels biofiltres percoladors, ja que per cada mol de sulfur d’hidrogen que es degrada són necessaris dos mols d’oxigen. En condicions de dèficit d’oxigen a la fase líquida, la reacció d'oxidació no es completa, i s’acumula sofre (producte intermedi) al material de rebliment de l’equip. El sofre és un sòlid pastós i, per tant, la seva acumulació augmenta els costos d’operació. Eventualment, si no es realitza una acció correctora, pot arribar a obturar totalment el biofiltre. S’ha estudiat el procés de biofiltració operant un biofiltre a escala industrial, que permet eliminar entre 2000-2500 ppmv de H2S amb un cabal de gas mitjà de 80 m3 h-1. La reducció del pH d’operació en 0.8 unitats ha reportat una reducció del 78 % del consum d’aigua, que s’usa per a la regulació del pH. S’ha comprovat la viabilitat de l’oxidació biològica de part del sofre acumulat a l’equip, eliminant el 40 % del sofre acumulat a l’equip en 21 dies. En el present estudi es proposa l’ús de dispositius intensius d’aeració, com són els dispositius venturi, per tal de poder subministrar la quantitat necessària d’oxigen per maximitzar la formació de sulfat. Aquest és posteriorment eliminat de l’equip mitjançant purgues de la fase líquida. Per a aquest fi s’han estudiat tres dispositius d’aeració comercials: un difusor de membrana, un ejector venturi i un jet venturi, en condicions d’operació similars a les que es donen en la biofiltració del sulfur d’hidrogen. S’han realitzat experiments en condicions similars a les que es donen en la biofiltració del sulfur d’hidrogen present al biogàs: pressió superior a l’atmosfèrica i presència de sulfat a la fase líquida. També s’ha estudiat l’efecte de la configuració del venturi, realitzant mesures de pèrdua de càrrega al llarg del dispositiu. Amb el difusor de membrana s’ha determinat l’efecte d’addicionar una fase no aquosa, per tal de maximitzar la transferència d’oxigen, i l’ús d’oxigen pur enlloc d’aire. L’equip que ha estat seleccionat, degut a la seva idoneïtat en base al seu consum energètic i l’eficàcia en la transferència d’oxigen, ha estat el jet venturi. Aquest dispositiu ha estat implementat en un biofiltre a escala industrial, reportant una millora en la conversió a sulfat del 32 %, amb una reducció del subministrament d’aire del 78%. L’operació del biofiltre amb el jet venturi s’ha traduït en una millora en la robustesa del sistema, ja que operant amb aquest dispositiu quan la càrrega d’entrada disminueix s’oxida parcialment el sofre acumulat a l’equip, mentre que amb el compressor, quan disminuïa el cabal de biogàs a tractar es parava l’entrada d’aire, empitjorant els problemes d’acumulació de sofre. Finalment, s’ha desenvolupat un model matemàtic que permet predir la formació de sofre i sulfat, fet que no havia estat reportat fins al moment. Aquest model ha estat ajustat i validat per dos biofiltres: un a escala laboratori i un a escala industrial. S’ha obtingut un ajust satisfactori de les dades experimentals i les simulades.

  • Modeling and control strategies development for anoxic biotrickling filtration

     Almenglo, Fernando; Ramírez, Martín; Gómez, José Manuel; Cantero, Domingo; Gamisans Noguera, Javier; Dorado Castaño, Antonio David
    International Conference on Biotechniques for Air Pollution Control and Bioenergy
    p. 123-131
    Presentation's date: 2013-09-11
    Presentation of work at congresses

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    The aim of this work was to evaluate different operational modes in an anoxic biotrickling filter (BTF) by means of a dynamic model. The model was calibrated and validated satisfactorily with experimental data from a pilot-scale anoxic biotrickling filter plant for biogas sweetening. Model simulations allowed to find the optimal mode operation and predicting the biotrickling filter behavior.

  • Conversion of chemical scrubbers to biotrickling filters for VOCs and H2S treatment at low contact times

     Guimera Villalba, Xavier; Dorado Castaño, Antonio David; Santos, Alfredo; Gamisans Noguera, Javier; Gabriel Buguña, David
    International Conference on Biotechniques for Air Pollution Control and Bioenergy
    p. 193-203
    Presentation's date: 2013-09-11
    Presentation of work at congresses

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    The purpose of this work was to evaluate the technical and economical feasibility of converting three in-series chemical scrubbers to biotrickling filters for the simultaneous removal at neutral pH of 10.000 m3 h-1 containing H2S and volatile organic compounds (VOCs) at a wastewater treatment plant (WWTP). The conversion was based on previous conversion protocols and mainly required of replacing the original packing material by a structured packing and recycle pumps, besides modifying the controls and operation of the reactors. Almost complete removal of HsS and VOCs was found 10 and 20 days after startup, respectively. Under the conditions at the WWTP, i.e., a gas contact time of about 1.4 seconds per reactor and pH controlled between 6.5 and 6.8, inlet average concentrations below 10 ppm, of H2S and below 5 ppm, for VOCs were completely degraded in the reactors. The first and second reactors played a major role in the H2S degradation.

  • Biomass accumulation effect on the hydrodynamics of an alkaline biotrickling filter treating dimethyl disulfide vapors: experimental determination towards a dynamic model description

     Arellano García, Luis; Dorado Castaño, Antonio David; Gamisans Noguera, Javier; Revah, Sergio
    International Conference on Biotechniques for Air Pollution Control and Bioenergy
    p. 267-274
    Presentation's date: 2013-09-11
    Presentation of work at congresses

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    The biomass accumulation effect on the performance of a biotrickling filter (BTF) has been assessed in termps of the hydrodynamics and the void space available to gas treatment changes. It was determined tht the available space for gas treatment inside the BTF had been reduced to almost half of that calculated initially when packing was biofilm free. Assuming that flow of liquid through a BTF can be described by the dispersion plug flow model, dispersion coefficients (Ddisp) of 0,12 and 0,33 m2 h-1 were determined when BTF was packed with clean and colonized packing respectively. These coefficients and other parameters assessed experimentally were used in a mathematical model to describe the dimethyl disulfide (DMDS) odors removal along the BTF height. The model that considered dispersion for the liquid flow fitted better to the experimental data, suggesting the importance of the axial dispersion which should be considered when modelling.

  • Development of a novel microsensor for the study of oxygen profiles in biofilms

     Guimera Villalba, Xavier; Prats Alfonso, Elisabet; Dorado Castaño, Antonio David; Villa, Rosa; Gamisans Noguera, Javier; Gabriel Buguña, David; Gabriel, Gemma
    International Conference on Biotechniques for Air Pollution Control and Bioenergy
    p. 275-285
    Presentation's date: 2013-09-11
    Presentation of work at congresses

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    Understanding of the processes taking place inside biofilms is a key parameter to progress in the optimization of biofiltration technologies. This study was conducted with the aim of developing a novel dissovled oxygen (DO) microsensor specially designed for biofilms monitoring. The microsensor was fabricated through standard photolithography techniques, resulting in a microelectrodes array (MEA) of 11 gold circular working electrodes, with a diameter of 50 µm , and a gold reference electrode, which allows obtaining a snapshot oxygen profile of 1 mm of depth. The performance of the sensor was fully characterized under different conditions, inwhich the sensor presented high sensitivity and repeatability, and low detection and quantification limits. Monitoring of sensor performance showed a stable and reliable response. The developed sensor was used in obtaining micropofiles in an aerobic heterotrophic biofilm, showing similar response to Clark-type commercial microsensors. These studies concluded that the novel MEA sensor for DO monitoring allows obtaining oxygen profiles within biofilms, becoming a useful tool for the research of many biological applications.

  • Conversion of chemical scrubbers to biotrickling filters for VOCs and H2S treatment at low contact times

     Guimera Villalba, Xavier; Dorado Castaño, Antonio David; Santos, Alfredo; Gamisans Noguera, Javier; Gabriel Buguña, David
    Date of publication: 2013-09
    Book chapter

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  • Development of a novel microsensor for the study of oxygen profiles in biofilms

     Guimera Villalba, Xavier; Moya, Ana; Prats-Alfonso, Elisabet; Dorado Castaño, Antonio David; Villa, Rosa; Gamisans Noguera, Javier; Gabriel Buguña, David; Gabriel, Gemma
    Date of publication: 2013-09
    Book chapter

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  • Modeling and control strategies for anoxic biotrickling filtration

     Almengló, Fernando; Ramírez, Martín; Gómez, José Manuel; Cantero, Domingo; Gamisans Noguera, Javier; Dorado Castaño, Antonio David
    Date of publication: 2013-09
    Book chapter

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  • Biomass accumulation effect on the hydrodynamics of an alkaline biotrickling filter treating dimethyl disulfide vapors: experimental determination towards a dynamic model description

     Arellano-Garcia, Luis; Dorado Castaño, Antonio David; Gamisans Noguera, Javier; Revah, Sergio
    Date of publication: 2013-09
    Book chapter

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  • DESARROLLO DE UNA NUEVA GENERACIÓN DE NANOESTRUCTURAS PARA LA ELIMINACIÓN DE GASES DE EFECTO INVERNADERO

     Dorado Castaño, Antonio David; Gamisans Noguera, Javier
    Competitive project

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    Biofiltration of WWTP sludge composting emission at contact times of 2 to 8 seconds  Open access

     Dorado Castaño, Antonio David; Gabriel Buguña, David; Gamisans Noguera, Javier
    IWA Specialized Conference on Odors and Air Emissions jointly Conference on Biofiltration for Air Pollution Control
    p. 1-8
    Presentation's date: 2013-03-05
    Presentation of work at congresses

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    The performance of a biotrickling filter for the abatement of composting emissions was evaluated at short contact times of 2 to 8 seconds. The effect of EBRT, pH control and water renovation rate were evaluated. The average elimination capacity was 13 and 3.3 g N/C m-3 h -1 for ammonia and VOCs, respectively, and the maximum EC obtained during a doping process were 40 and 20 g N/C m -3 h -1 . Biotrickling filters appear as a better alternative than biofilters due to their controllability. However, water renovation becomes a critical parameter to avoid substrate inhibition by nitrite and ammonia accumulation. Not only ammonia absorption is negatively affected at low renovation rate but it is also affected the biological process. A decrease of 40 % was detected in the nitrification step when the hydraulic residence time increased from 2 to 5 hours. Results presented herein demonstrate that high removal efficiencies can be achieved for composting emissions in a biotrickling filter operated at short contact times which entails a substantial reduction of operational and investment costs in comparison to traditional techniques.

    Postprint (author’s final draft)

  • Elaboració de materials docents interactius aplicats a l'experimentació en bioenginyeria

     Bonsfills Pedros, Ana; Dorado Castaño, Antonio David; Gamisans Noguera, Javier; Lao Luque, Concepcion; Sole Sardans, M. Montserrat
    Jornada d'Innovació Docent UPC
    p. 1-5
    Presentation's date: 2013-02-08
    Presentation of work at congresses

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  • Monitorización, modelización y control para la optimización de biofiltros percoladores de desulfuración anóxicos y aerobios

     Bonsfills Pedros, Ana; Gamisans Noguera, Javier; Lao Luque, Concepcion; Dorado Castaño, Antonio David; Sole Sardans, M. Montserrat
    Competitive project

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  • Monitorización, modelización y control para la optimización de biofiltros percoladores de desulfuración anoxicos y aerobios

     Dorado Castaño, Antonio David; Lao Luque, Concepcion; Bonsfills Pedros, Ana; Sole Sardans, M. Montserrat; Gamisans Noguera, Javier
    Competitive project

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  • Eficacia de las tecnologías de reducción de olores en la red de alcantarillado de Sídney (Australia)

     Dorado Castaño, Antonio David; Stuetz, R.
    Conferencia sobre Gestión de Olores en el Medio Ambiente
    p. 1-7
    Presentation's date: 2012-11-27
    Presentation of work at congresses

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  • Premi Extraordinari de Doctorat 2012 a la millor tesi doctoral en l'àmbit d'Enginyeria Industrial llegida en el any acadèmic 2009-2010.

     Dorado Castaño, Antonio David; Gamisans Noguera, Javier; Gabriel Buguña, David
    Award or recognition

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  • Elaboració de materials docents interactius en enginyeria química: bescanviadors de calor  Open access

     Bonsfills Pedros, Ana; Dorado Castaño, Antonio David; Gamisans Noguera, Javier; Lao Luque, Concepcion; Sole Sardans, M. Montserrat
    Jornada d'Innovació Docent UPC
    p. 1-5
    Presentation's date: 2012-02-07
    Presentation of work at congresses

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  • Página web Intercambiadores de calor

     Bonsfills Pedros, Ana; Gamisans Noguera, Javier; Lao Luque, Concepcion; Sole Sardans, M. Montserrat; Dorado Castaño, Antonio David
    Congreso de Innovación Docente en Ingeniería Química
    p. 15
    Presentation's date: 2012-01-27
    Presentation of work at congresses

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  • Página web planta piloto de secado de sólidos

     Bonsfills Pedros, Ana; Gamisans Noguera, Javier; Lao Luque, Concepcion; Sole Sardans, M. Montserrat; Dorado Castaño, Antonio David
    Congreso de Innovación Docente en Ingeniería Química
    p. 16
    Presentation's date: 2012-01-27
    Presentation of work at congresses

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  • Optimización de recursos y mitigación de la contaminación ambiental producida por la minería en Bolivia

     Dorado Castaño, Antonio David; Alfonso Abella, María Pura; Parcerisa Duocastella, David; Mata Perello, Jose Maria; Casas Sabata, Jose Maria; Oliva Moncunill, Josep; Torró Abat, Lisard; Melgarejo Draper, Joan Carles; Higueras Higueras, Pablo Leon; Llanos Lazcano, Willians; Canet Miquel, Carles; Martin Romero, Francisco; Zamora Echenique, Gerardo; Rodríguez Lafuente, Mariel; Zambrana Martínez, Rubén Néstor; Loredo, Valentín; Peñarrieta Venegas, Lía; Cortez Torrez, José Antonio; Villegas Flores, Karla Stephanie; Arancibia Balderrama, Hanz Jhony
    Competitive project

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  • Performance of a biotrickling filter for the removal of hydrogen sulfide present in biogas

     Rodriguez Mary, Ginesta; Dorado Castaño, Antonio David; Bonsfills Pedros, Ana; Gamisans Noguera, Javier; Gabriel Buguña, David
    Mediterranean Congress of Chemical Engineering
    Presentation's date: 2011-11-18
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  • A comparative study of oxygen transfer devices applied to biological sweetening of biogas

     Rodriguez Mary, Ginesta; Dorado Castaño, Antonio David; Bonsfills Pedros, Ana; Sanahuja Moliner, Ricard; Gamisans Noguera, Javier; Gabriel Buguña, David
    Mediterranean Congress of Chemical Engineering
    Presentation's date: 2011-11-17
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  • La química i la societat

     Grau Vilalta, Maria Dolors; Font Soldevila, Jose; Sanz Balague, Joaquim; Guaus Guerrero, Ester; Calvet Tarragona, Aurelio; Salán Ballesteros, Mª Núria; Martínez Martínez, María R.; Farran Marsa, Adriana; Gorchs Altarriba, Roser; Alvarez Del Castillo, M. Dolores; Garrido Soriano, Nuria; Morillo Cazorla, Margarita; Almajano Pablos, Maria Pilar; Cardona Planes, Anna Maria; Macanás de Benito, Jorge; Bonsfills Pedros, Ana; Gamisans Noguera, Javier; Dorado Castaño, Antonio David; Lao Luque, Concepcion; Torrent Burgues, Juan; Molins Duran, Gemma; Colom Fajula, Xavier; Carrillo Navarrete, Fernando; Ramon Portés, Eva; Garriga Sole, Pere; Sole Sardans, M. Montserrat; Ardanuy Raso, Monica; Pares Sabates, Ferran; Roncero Vivero, Maria Blanca; Cusola Aumedes, Oriol
    Collaboration in exhibitions

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  • Optimization of oxygen transfer through venturi-based systems applied to the biological sweetening of biogas

     Rodriguez Mary, Ginesta; Dorado Castaño, Antonio David; Bonsfills Pedros, Ana; Sanahuja Moliner, Ricard; Gamisans Noguera, Javier; Gabriel Buguña, David
    International Conference on Biotechniques for Air Pollution Control
    p. 27-33
    Presentation's date: 2011-10-12
    Presentation of work at congresses

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  • Interaction between sorption and biodegradation in a biofilter packed with activated carbon

     Dorado Castaño, Antonio David; Lafuente, Javier; Gabriel Buguña, David; Gamisans Noguera, Javier
    IWA Conference on Odours and VOCs
    p. 1-11
    Presentation's date: 2011-10-17
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  • Adsorción de compuestos emergentes por medio de distintos carbones activados

     Llado Valero, Jordi; Ruiz Bobes, Begoña; Fuente Alonso, Enrique; Sole Sardans, M. Montserrat; Dorado Castaño, Antonio David; Lao Luque, Concepcion
    Reunión del Grupo Español del Carbón
    p. 252-253
    Presentation's date: 2011-10
    Presentation of work at congresses

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  • Fira del Coneixement 2011

     Grau Vilalta, Maria Dolors; Font Soldevila, Jose; Dorado Castaño, Antonio David
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  • Elaboració de materials docents interactius aplicats a l'experimentació en enginyeria química  Open access

     Bonsfills Pedros, Ana; Dorado Castaño, Antonio David; Gamisans Noguera, Javier; Lao Luque, Concepcion; Sole Sardans, M. Montserrat
    Jornada d'Innovació Docent UPC
    Presentation's date: 2011-02-02
    Presentation of work at congresses

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  • Què és l'enginyeria química?

     Grau Vilalta, Maria Dolors; Bonsfills Pedros, Ana; Casas Sabata, Jose Maria; Dorado Castaño, Antonio David; Gamisans Noguera, Javier
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  • Utilisation of activated carbon in biofilters for elimination of industrial waste gases

     Gabriel Buguña, David; Prado, Óscar Jesús; Lafuente, Javier; Gamisans Noguera, Javier; Maestre, Juan P.; Hernández, Jerónimo; Dorado Castaño, Antonio David
    Date of publication: 2011
    Book chapter

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  • Aplicació de tècniques biotecnològiques a l'extracció de metalls presents en menes metàl·liques

     Dorado Castaño, Antonio David; Sole Sardans, M. Montserrat; Lao Luque, Concepcion; Bonsfills Pedros, Ana; Oliva Moncunill, Josep; Parcerisa Duocastella, David; Alfonso Abella, María Pura
    Competitive project

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  • Predicting clogging in biofilters through a straightforward and comprehensive mathematical model

     Dorado Castaño, Antonio David; Lafuente, Javier; Gabriel Buguña, David; Gamisans Noguera, Javier
    Duke - UAM Conference on Biofiltration for Air Pollution Control
    p. 287-294
    Presentation's date: 2010-10-29
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  • Experimentación en Ingeniería Química

     Bonsfills Pedros, Ana; Dorado Castaño, Antonio David; Gamisans Noguera, Javier; Lao Luque, Concepcion; Sole Sardans, M. Montserrat
    Jornadas de Ingeniería Química
    p. 97-99
    Presentation's date: 2010-09-17
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  • Desulfuración gases ricos energéticam. median. biofiltros percoladores desarrollo optimizac. del proceso en condiciones anóxicas y aerobias

     Dorado Castaño, Antonio David; Sole Sardans, M. Montserrat; Bonsfills Pedros, Ana; Gamisans Noguera, Javier
    Competitive project

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  • Exposició On és la química? i tallers/'Què és l'enginyeria química?

     Gorchs Altarriba, Roser; Dorado Castaño, Antonio David; Sole Sardans, M. Montserrat; Lao Luque, Concepcion; Font Soldevila, Jose; Gamisans Noguera, Javier; Busquets Rubio, Pere; Sanz Balague, Joaquim; Bonsfills Pedros, Ana; Casas Sabata, Jose Maria; Grau Vilalta, Maria Dolors
    Competitive project

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  • Biofiltració de contaminants gasosos en aire: caracterització de paràmetres clau per l'estudi i modelització del creixement de biomassa  Open access  awarded activity

     Dorado Castaño, Antonio David
    Department of Mining Engineering and Natural Resources, Universitat Politècnica de Catalunya
    Theses

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    Biofiltration has become an effective and economical alternative to traditional gas treatment systems. High costs of operation and energy consumption associated to conventional treatments have lead to increase the attention on biological processes. In general, a biofilter consists in a reactor packed with a carrier material (organic or inorganic) serving as a support for biofilm growth. The contaminated air stream to be treated is passed through the fixed-bed and the pollutant is transferred from the gas to the biofilm by absorption. In the biofilm, diffusion and biodegradation take place simultaneously. Thus, biofiltration employs the metabolic activity of microorganisms to degrade pollutants which are the energy source for microbial growth. In biofiltration, the mass transfer processes from the gas phase to the biofilm and the posterior biological degradation are the main phenomena involved in the abatement of volatile compounds in air. The correct description of biofilters, based on main phenomena, is related with physico-chemical properties of the packing materials used to immobilize the biomass and the operating conditions. Biofilters modeling has received less attention in comparison to experimental works, which is related with the complexity of the process, due to the physical, chemical and biological interactions. In this doctoral Thesis, firstly, research motivation, scope and outline of the work is presented (chapter 1). Secondly, in a general introduction (chapter 2), main physico-chemical treatments to abate volatile compounds in air are described in comparison to the different biological alternatives. In the same chapter, the key factors in the operation of biofilters are presented. Key factors lead to describe main mechanisms involved in the process of biofiltration, in order to incorporate the different phenomena in a mathematical model to describe the behavior of biofilters, underlining the biomass growth and their consequences in the operation. Objectives are in chapter 3 and Materials and Methods in chapter 4. Doctoral Thesis is presented as a compendium of 9 articles annexed in the Results’ chapter (chapter 5) to their latter general discussion (chapter 6). First 6 articles are related with experimental results of key factors and the other 3 articles are related with mathematical modeling of the processes which describe the behavior of biofilters. In the article “A comparative study based on physical characteristics of the most suitable packing materials for common situations in biofiltration” 10 packing materials commonly used as support media in biofiltration are analyzed and compared to evaluate their suitability according to physical characteristics. The materials studied were chosen according to previous works in the field of biofiltration including both organic and inorganic (or synthetic) materials. A set of nine different parameters were selected to cope with well-established factors such as material specific surface area, pressure drop, nutrients supply, water retentivity, sorption capacity and purchase cost. One ranking of packing materials was established per each parameter studied to define a relative suitability degree. Since biofiltration success generally depends on a combination of the ranked parameters, a procedure was defined to compare suitability of packing materials under common situations in biofiltration. Selected scenarios such as biofiltration of intermittent loads of pollutant and biofiltration of waste gases with low relative humidity were investigated. Among materials with high potential to be used as support media in biofilters, in the article “Evaluation of sludge-based carbon as packing material in biofiltration in comparison to classic materials”, a carbon obtained from sludge from wastewater treatment facilities is analyzed to use it as support material in a biofilter in comparison to classical materials used in this purpose. The study includes the performance of material in an operative, lab-scale biofilter. Apart from evaluating main properties of materials in their nature state, in the article “The role of water in performance of biofilters: parameterization of pressure drop and sorption capacities for common packing materials” is studied how the amount of water retained in biofilters affects physical properties of packing materials and packed beds. In this study, the influence of water on the pressure drop and sorption capacities of different packing materials were experimentally studied and compared. Pressure drop was characterized as a function of dynamic hold-up, porosity and gas flow rate. Sorption capacities for toluene were determined for both wet and dry materials to obtain information about the nature of interactions between the contaminant, the packing materials and the aqueous phase. The experimental sorption capacities of materials were fitted to different isotherm models for gas adsorption in porous materials. The corresponding confidence interval was determined by the Fisher information matrix. The results quantified the dynamic hold-up effect resulting from the significant increase in the pressure drop throughout the bed, i.e. the financial cost of driving air, and the negative effect of this air on the total amount of hydrophobic pollutant that can be adsorbed by the supports. Furthermore, the results provided equations for ascertaining water presence and sorption capacities that could be widely used in the mathematical modeling of biofilters. Later, in the article “Evaluation of mass transfer coefficients in biotrickling filters: experimental determination and comparison to correlations”, overall mass transfer coefficients were determined experimentally. A simple methodology based on overall mass balances and following a standard procedure allowed to calculate the mass transfer coefficients at different operating conditions corresponding to usual biofilter situations. Experimental results were fitted to existing and well-accepted correlations used in conventional biofilters or biotrickling filters modeling. Simple correlations for the experimental data obtained in this study were also suggested. Consequently, in the article “Development of a kinetic model for elemental sulfur and sulfate formation from the autotrophic sulfide oxidation using respirometric techniques” mass transfer is described in a respirometer in order to characterize a tool used usually in biofiltration to determine experimentally kinetic parameters. Finally, once physical phenomena have been characterized, biodegradation of a common pollutant (toluene) and the corresponding biomass growth from inoculation to biofilter clogging is studied towards future modeling of the system. In the article “Biomass accumulation in a biofilter treating toluene at high loads. Part 1: Experimental performance from inoculation to clogging” carbon dioxide production, oxygen consumption, toluene removal, pressure drop and biofilter weight were the parameters related with biomass growth which were monitored in 5 sampling ports along the height of the bioreactor during 120 days of operation. In the second step of the study, the main results in the modeling of biofilters are described according to the experimental data collected in the first part of the study. To achieve the final objective of modeling biomass growth inside biofilters, a base model is developed including the main phenomena involved in biofiltration. The validation of this base model, which predicts the outlet concentrations of pollutant according to system characteristics and operating conditions, has been used satisfactory to describe the evolution from bacterial to fungal population inside a biofilter, as it is detailed in “Modeling of a bacterial and fungal biofilter applied to toluene abatement: kinetic parameter estimation and model validation”. The mathematical model is based on detailed mass balances which include the main processes involved in the system: advection, absorption, diffusion and biodegradation. The model was calibrated and validated using experimental data obtained from two equal lab-scale biofilters. A novel procedure in gas biofilters modeling was considered for checking the model calibration, by the assessment of the parameters confidence interval based on the Fisher Information Matrix (FIM). Additionally, the incorporation of extra phenomena in the base model is studied and a sensitivity analysis is performed to distinguish the most significant parameters under a wide range of operation conditions. This part of the study is included in “Developing a general diffusion-reaction model applied to gas-phase VOCs removal by biofiltration: parameter analysis and phenomena study”. Experimental results in the study of the key factors and discussion of phenomena involved in the process, let to develop, calibrate and validate a dynamic model describing the behavior of biofilters for waste gas treatment considering biomass growth. The dynamic model predicts outlet concentrations along the height of the biofilter and the consequences of biomass growth in the progressive decrease in bed porosity and the increase in pressure drop, relating with the increase in the operating cost and the substitution of the packing material by bed clogging. The satisfactory predictions of the dynamic model to experimental data are presented in the article “Biomass accumulation in a biofilter treating toluene at high loads. Part 2: Model development, calibration and validation

    La biofiltració ha esdevingut una alternativa efectiva i econòmica als sistemes tradicionals fisicoquímics de tractament de contaminants gasosos. Les elevades despeses d’operació i el consum energètic associat als tractaments convencionals han accentuat l’atenció en els processos biològics. En general, un biofiltre consisteix en un reactor empacat amb un material de rebliment (orgànic o inorgànic) que esdevé el medi de suport pel creixement dels microorganismes. L’aire a tractar circula a través del llit i els contaminants es transfereixen des del gas a la biopel·lícula per absorció, on posteriorment difonen i es biodegraden simultàniament. D’aquesta manera, en biofiltració, s’aprofita l’activitat metabòlica dels microorganismes per degradar contaminants que esdevenen la font de matèria i energia pel seu creixement. En biofiltració, la transferència de massa des de la fase gas a la biopel·lícula i la posterior degradació biològica són els principals fenòmens responsables de l’eliminació dels contaminants volàtils en aire. La correcta descripció d’un biofiltre, basada en aquests dos principals processos, es relaciona amb les propietats fisicoquímiques del material de rebliment utilitzat per immobilitzar la biomassa i les condicions d’operació. La modelització de biofiltres ha rebut menys atenció en comparació als treballs experimentals, fet que es relaciona amb la complexitat del procés, que inclou diverses interaccions físiques, químiques i biològiques. En la present tesi doctoral, en primer lloc, es descriu la problemàtica i s’expliquen els antecedents de l’estudi i les motivacions del mateix (capítol 1). En segon lloc, en un capítol introductori (capítol 2) es descriuen els principals tractaments fisicoquímics per l’eliminació de contaminants gasosos en aire en comparació amb les diferents configuracions dels tractaments biològics. En aquest mateix capítol, es presenten els factors que han estat identificats com a claus en l’operació de biofiltres. Els factors clau permeten descriure els principals mecanismes implicats en els processos de biofiltració, a fi d’incorporar els diferents fenòmens en un model matemàtic que descrigui el comportament d’un biofiltre, posant especial atenció en el creixement de biomassa i en les seves conseqüències sobre l’operació. En el capítol 3 es recullen els principals objectius de l’estudi i en el capítol 4 els materials i mètodes utilitzats. La present tesi doctoral es presenta com a compendi d’un total de 9 articles que s’annexen en l’apartat de resultats (capítol 5) per a la seva posterior discussió general (capítol 6). Els primers 6 articles corresponen a l’estudi experimental dels paràmetres clau en biofiltració i els 3 restants, a la modelització matemàtica dels processos que descriuen el comportament d’un biofiltre. En l’article “A comparative study based on physical characteristics of the most suitable packing materials for common situations in biofiltration” es selecciona el material més adient en funció de les característiques físiques, que es relacionen amb les principals funcions que el material ha de portar a terme en un biofiltre, sense deixar de banda els criteris econòmics (despesa del material i costs d’operació associat a la utilització del material). L’estudi dels paràmetres clau en biofiltració es realitza comparativament en 10 materials de rebliment comunament utilitzats en biofiltració o potencialment utilitzables per les seves propietats. Entre els materials amb un elevat potencial per ser utilitzats com a material de rebliment en biofiltració, en l’article “Evaluation of sludge-based carbon as packing material in biofiltration in comparison to classic materials” s’avalua la reutilització d’un fang procedent d’una estació depuradora d’aigües residuals (tractat prèviament), per eliminar toluè. A banda d’avaluar les principals propietats dels materials en el seus estats naturals, en l’article “The role of water in performance of biofilters: parameterization of pressure drop and sorption capacities for common packing materials” també s’estudia la influència que exerceixen les condicions d’humitat pròpies de la biofiltració en dos paràmetres clau en l’operació: les pèrdues de pressió que experimenta el fluid i les capacitats dels materials per adsorbir el contaminant i esmorteir les possibles fluctuacions de càrrega. Posteriorment, en l’article “Evaluation of mass transfer coefficients in biotrickling filters: experimental determination and comparison to correlations” es caracteritza la transferència de massa a partir d’un procediment experimental senzill i es compara amb els resultats obtinguts amb les correlacions empíriques més utilitzades en els estudis de biofiltració. En l’article “Development of a kinetic model for elemental sulfur and sulfate formation from the autotrophic sulfide oxidation using respirometric techniques” també es descriu la transferència de massa, però en aquesta ocasió per un respiròmetre en fase líquida, amb el propòsit de caracteritzar el fenomen en una eina utilitzada habitualment en biofiltració, per la determinació experimental de paràmetres cinètics. Finalment, una vegada caracteritzats els fenòmens físics implicats, s’estudia la degradació d’un contaminant comú (toluè) i el creixement de biomassa associat des de la inoculació del reactor fins a la colmatació del llit. Els resultats obtinguts es presenten en l’article “Biomass accumulation in a biofilter treating toluene at high loads. Part 1: Experimental performance from inoculation to clogging”. El propòsit final és enregistrar l’evolució dels principals paràmetres relacionats amb el creixement de la biopel·lícula per modelitzar el procés d’acumulació de biomassa. En la segona part de l’estudi es descriuen els principals resultats obtinguts en la modelització del procés de biofiltració partint de la informació experimental obtinguda sobre els paràmetres clau en biofiltració. Per assolir l’objectiu final de modelitzar el creixement de biomassa a l’interior d’un biofiltre es parteix del desenvolupament d’un model bàsic que inclou els principals fenòmens que descriuen el procés de biofiltració. La validesa d’aquest model bàsic, que prediu les concentracions de sortida de contaminant en funció de les característiques del sistema i les condicions d’operació, ha estat satisfactòriament comprovada en la descripció de l’evolució de poblacions a l’interior d’un biofiltre, tal i com es detalla en l’article “Modeling of a bacterial and fungal biofilter applied to toluene abatement: kinetic parameter estimation and model validation”. Per altra banda, s’estudia la incorporació de fenòmens addicionals en el model bàsic i es realitza un anàlisi de sensibilitat dels paràmetres del model, per discernir quins són els paràmetres més influents en les prediccions del model. Aquesta part es recull en l’article “Developing a general diffusion-reaction model applied to gas-phase VOCs removal by biofiltration: parameter analysis and phenomena study”. Els resultats obtinguts a nivell experimental en l’estudi de paràmetres clau de l’operació d’un biofiltre i la discussió realitzada en la modelització dels fenòmens que descriuen el procés, permet desenvolupar, calibrar i validar un model dinàmic que descriu els comportament d’un biofiltre pel tractament d’un contaminant gasós, incloent el creixement de biomassa. El model dinàmic de creixement prediu el perfil de concentracions en el biofiltre al llarg del temps, al mateix temps que preveu les conseqüències de l’augment del gruix de la biopel·lícula en la progressiva disminució de la porositat del llit i l’increment de les pèrdues de pressió, relacionades a la vegada, amb l’increment de les despeses d’operació i la possible substitució del material per la colmatació del llit. L’ajust satisfactori de les prediccions del model a dades experimentals obtingudes en l’operació d’un biofiltre real a escala laboratori es presenten en l’article “Biomass accumulation in a biofilter treating toluene at high loads. Part 2: Model development, calibration and validation”. Les principals conclusions del treball es presenten en el capítol 7, a la vegada que s’obre la porta a la continuació del treball amb nous estudis (capítol 8).

  • Study of the biomass accumulation from inoculation to clogging in a biofilter treating toluene at high loads

     Dorado Castaño, Antonio David; Gamisans Noguera, Javier; Baeza, Juan A.; Lafuente, Javier; Gabriel Buguña, David
    DOI: 10.1201/b10563-47
    Date of publication: 2010
    Book chapter

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  • Study of the biomass accumulation from inoculation to clogging in a biofilter treating toluene at high loads

     Dorado Castaño, Antonio David; Baeza, Juan A.; Lafuente, J; Gabriel Buguña, David; Gamisans Noguera, Javier
    International Conference on Biotechniques for Air Pollution Control
    p. 204-207
    Presentation's date: 2009-09
    Presentation of work at congresses

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  • Caracterización cinética de la oxidación aerobia de H2S usando respirometría LFS

     González Sanchez, Armando; Tomas, Maria; Dorado Castaño, Antonio David; Gamisans Noguera, Javier; Guisasola, Albert; Lafuente, Javier; Gabriel Buguña, David
    Congreso Nacional de Biotecnología y Bioingeniería
    p. 1
    Presentation's date: 2009-06-21
    Presentation of work at congresses

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  • Development of a kinetic model for elemental sulfur and sulfate formation from the autotrophic sulfide oxidation using respirometric techniques

     González, Armando; Tomàs, Maria; Dorado Castaño, Antonio David; Gamisans Noguera, Javier; Guisasola, Albert; Lafuente, Javier; Gabriel Buguña, David
    IWA International Conference on Odour and Volatile Organic Compounds
    p. 1-10
    Presentation's date: 2008-10-08
    Presentation of work at congresses

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  • Evaluation of sludge-based carbon as packing material in biofiltration in comparison to classic materials

     Dorado Castaño, Antonio David; Hernández, J; Ribera, G; Gabriel Buguña, David; Lafuente, J; Gamisans Noguera, Javier
    IWA International Conference on Odour and Volatile Organic Compounds
    p. 1-10
    Presentation of work at congresses

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  • A comparative study of the characteristics and physical behaviour of different packing materials commonly used in biofiltration

     Dorado Castaño, Antonio David; Lafuente Sancho, Francisco Javier; Gamisans Noguera, Javier
    Biotechniques for Air Pollution Control
    p. 251-263
    Presentation's date: 2007-10-03
    Presentation of work at congresses

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  • A comparative study of the characteristics and physical behaviour of different packing materials commonly used in biofiltration

     Dorado Castaño, Antonio David; Gamisans Noguera, Javier; Gabriel Buguña, David; Lafuente, Javier
    DOI: 10.1080/09593330903426687
    Date of publication: 2007
    Book chapter

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