Cusido Fabregas, Juan Antonio
Total activity: 58
Department
Department of Physics and Nuclear Engineering
School
Vallès School of Architecture (ETSAV)
E-mail
joan.antoni.cusidoupc.edu
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    Atomized sludges via spray-drying at low temperatures: an alternative to conventional wastewater treatment plants  Open access

     Cusido Fabregas, Juan Antonio; Cremades Oliver, Lazaro Vicente
    Journal of environmental management
    Date of publication: 2012-04
    Journal article

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    Removal of sludges from Wastewater Treatment Plants (WWTP) represents a serious worldwide environmental problem for which alternatives other than their simple incineration are investigated. In this work the treatment of raw sludge from urban WWTP by means of a minimization process through spraydrying is analyzed as well as some proposals for revaluating the resulting dry product. Analysis is supported by some experimental results obtained with a laboratory spray dryer. The experimental procedure at laboratory scale is extrapolated to an industrial plant scale. An economic analysis of the proposal in relation to other possible sludge treatments is presented, taking into account in this case the comparison between the costs of the processes of sludge thickening, stabilization and dehydratation and the costs of spray-drying (especially power consumption), minimization of the ¿nal waste and reuse options. Finally, an environmental balance of the process is presented. In contrast with the classical treatment line, this alternative allows transforming sludges, i.e., a waste, into a valuable product with several applications.

    Removal of sludges from Wastewater Treatment Plants (WWTP) represents a serious worldwide environmental problem for which alternatives other than their simple incineration are investigated. In this work the treatment of raw sludge from urban WWTP by means of a minimization process through spraydrying is analyzed as well as some proposals for revaluating the resulting dry product. Analysis is supported by some experimental results obtained with a laboratory spray dryer. The experimental procedure at laboratory scale is extrapolated to an industrial plant scale. An economic analysis of the proposal in relation to other possible sludge treatments is presented, taking into account in this case the comparison between the costs of the processes of sludge thickening, stabilization and dehydratation and the costs of spray-drying (especially power consumption), minimization of the final waste and reuse options. Finally, an environmental balance of the process is presented. In contrast with the classical treatment line, this alternative allows transforming sludges, i.e., a waste, into a valuable product with several applications.

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    Environmental effects of using clay bricks produced with sewage sludge: leachability and toxicity studies  Open access

     Cusido Fabregas, Juan Antonio; Cremades Oliver, Lazaro Vicente
    Waste management
    Date of publication: 2012-04
    Journal article

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    Use of sewage sludge from wastewater treatment plants as a raw material for making clay bricks has been analyzed to be an option to dumping sludges into landfills. This alternative has been shown feasible and interesting due to the high rate of use of ceramic materials in the building sector. However, it meets with some environmental issues and some prejudices on the part of users. This work shows some leachability and toxicity tests (outgassing and offgassing) which demonstrate the environmental compatibility of these ceramic products to be used as building materials and even in deconstruction of the building once its useful life is ended.

  • Dispositivo de micro y ultrafiltración tangento-axial de alto rendimiento mediante macromembrana cerámica

     Cusido Fabregas, Juan Antonio; Cremades Oliver, Lazaro Vicente; Sitjar Cañellas, Rafael; Anglada Gomila, Marcos Juan
    Date of request: 2012-01-20
    Invention patent

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    La invención incluye una macromembrana cerámica para micro y ultrafiltración de fluidos, incluido agua, y el dispositivo de filtración que la utiliza. Esta macromembrana se caracteriza por poder tener cualquier tamaño y morfología, y funciona según un nuevo concepto operativo denominado "tangento-axial". Su producción se realiza por "slip casting" (vaciado), a diferencia de la producción estándar de piezas tubulares cerámicas por extrusión. La principal aportación de esta tecnología radica en que las plantas de filtración y su operación son más simples y, por lo tanto, con un menor coste de implantación del proceso. Por otro lado, los rendimientos de la filtración de la tecnología propuesta pueden llegar a ser 5 veces superiores o más respecto a los obtenidos de la filtración tangencial convencional.

  • Valorization of pellets from municipal WWTP sludge in lightweight clay ceramics

     Cusido Fabregas, Juan Antonio; Soriano Ortiz, Cecilia
    Waste management
    Date of publication: 2011-06
    Journal article

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    A direct result of the growing number of municipal wastewater-treatment plants (WWTPs) has been an increase in the generation of large amounts of sewage sludge that requires environmentally acceptable final destination. To decrease the volume of sludge, a common technique is drying the sludge at a low temperature in rotary kilns. The result of this process is a granulated material consisting of dehydrated sludge pellets. After this treatment, this pelletized material becomes easier to manipulate, but it also becomes a more toxic waste, containing dangerous substances, mostly of the lipid type. At its final stage, this material is usually incinerated, used as a comburent material, used as an agricultural fertilizer, or used in the cement industry. Each application has its own problems and requires remediation measures from the safety and environmental viewpoints. In this study, we looked beyond these possible applications and analyzed the transformation of sewage sludge through a ceramization process into a material similar to expanded clays; we subsequently explored its uses in the building industry or in the agriculture industry, among others. Both the properties of the product material and the production method were characterized, and an environmental analysis was conducted. The new, lightweight material had a microstructure with open porosity and low thermal conductivity. Environmental characterization such as the leaching test revealed that undetectable amounts of hazardous metals from the sludge were present in the leachate after the sludge went through a thermal treatment, despite their initial presence (with the exception of vanadium, which could pose some restrictions on some of the proposed uses for the final product). Toxicity tests also showed negative results. The study of gaseous emissions during production revealed emissions factors similar to those during the production of conventional clay ceramics, although with higher organic emissions.

    A direct result of the growing number of municipal wastewater-treatment plants (WWTPs) has been an increase in the generation of large amounts of sewage sludge that requires environmentally acceptable final destination. To decrease the volume of sludge, a common technique is drying the sludge at a low temperature in rotary kilns. The result of this process is a granulated material consisting of dehydrated sludge pellets. After this treatment, this pelletized material becomes easier to manipulate, but it also becomes a more toxic waste, containing dangerous substances, mostly of the lipid type. At its final stage, this material is usually incinerated, used as a comburent material, used as an agricultural fertilizer, or used in the cement industry. Each application has its own problems and requires remediation measures from the safety and environmental viewpoints. In this study, we looked beyond these possible applications and analyzed the transformation of sewage sludge through a ceramization process into a material similar to expanded clays; we subsequently explored its uses in the building industry or in the agriculture industry, among others. Both the properties of the product material and the production method were characterized, and an environmental analysis was conducted. The new, lightweight material had a microstructure with open porosity and low thermal conductivity. Environmental characterization such as the leaching test revealed that undetectable amounts of hazardous metals from the sludge were present in the leachate after the sludge went through a thermal treatment, despite their initial presence (with the exception of vanadium, which could pose some restrictions on some of the proposed uses for the final product). Toxicity tests also showed negative results. The study of gaseous emissions during production revealed emissions factors similar to those during the production of conventional clay ceramics, although with higher organic emissions. As for conventional clay ceramics, industrial production would require the implementation of some type of air-depuration system. The results showed that the ceramization of sludge pellets is a promising valorization technique worth considering from both the economic and technological perspectives.

  • Micro i ultrafiltració targento-axial per macromembranes

     Mestra Rodríguez, Alvaro Miguel; Cremades Oliver, Lazaro Vicente; Cusido Fabregas, Juan Antonio; Anglada Gomila, Marcos Juan
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  • Premio Jaume Blasco a la Innovación

     Cusido Fabregas, Juan Antonio; Cremades Oliver, Lazaro Vicente; González Benítez, María Margarita
    Award or recognition

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  • Custom formulation of red ceramics with clay, sewage sludge and forest waste

     Devant Guille, Martí; Cusido Fabregas, Juan Antonio; Soriano Ortiz, Cecilia
    Applied clay science
    Date of publication: 2011-10
    Journal article

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    The large quantities of sewage sludge that are currently generated require new alternatives for its recycling and final destination, beyond already known methods in the agriculture and cement industry. The use of this sludge as raw material for the production of structural ceramics, such as clay bricks, may become an interesting alternative, both from an industrial and environmental point of view. Several investigations have addressed this issue by formulating binary mixtures of sludge with clay. However, the incorporation of forest waste into the binary mixture described in this paper allows a high amount of sewage sludge to be assimilated into an extrudable mix and represents a better choice for the valorization of this hazardous waste. In this study the physicochemical properties of several formulations of ternary mixtures were analyzed. A ternary pseudo diagram was obtained relating the physicochemical properties of the ceramic product to the fraction of the raw materials. The optimal ternary mixture of 10% sludge, 10% forest waste and 80% clay, yielded a ceramic material with compression strength of 96 kp/cm2. It also met the technological limit of 8 bar to give and extrudable material. The mixture would be suitable for building ceramics, with low thermal conductivity (0.31 W/m·K) and high porosity (59.4%). The environmental aspects of the production of these ceramics were investigated by leaching and outgassing tests.

    The large quantities of sewage sludge that are currently generated require new alternatives for its recycling and final destination, beyond already known methods in the agriculture and cement industry. The use of this sludge as raw material for the production of structural ceramics, such as clay bricks, may become an interesting alternative, both from an industrial and environmental point of view. Several investigations have addressed this issue by formulating binary mixtures of sludge with clay. However, the incorporation of forest waste into the binary mixture described in this paper allows a high amount of sewage sludge to be assimilated into an extrudable mix and represents a better choice for the valorization of this hazardous waste. In this study the physicochemical properties of several formulations of ternary mixtures were analyzed. A ternary pseudo diagram was obtained relating the physicochemical properties of the ceramic product to the fraction of the raw materials. The optimal ternary mixture of 10% sludge, 10% forest waste and 80% clay, yielded a ceramic material with compression strength of 96 kp/cm2. It also met the technological limit of 8 bar to give and extrudable material. The mixture would be suitable for building ceramics, with low thermal conductivity (0.31 W/m·K) and high porosity (59.4%). The environmental aspects of the production of these ceramics were investigated by leaching and outgassing tests.

  • Evaluación de la incidencia de patologías respiratorias por exposición al polvo de madera de los carpiteros del Quindío (Colombia).  Open access

     Gómez Yepes, Milena Elizabeth
    Defense's date: 2010-10-29
    Department of Engineering Design, Universitat Politècnica de Catalunya
    Theses

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    Es bien conocido por la comunidad científica internacional que la exposición al polvo de madera, dependiendo del tipo de madera utilizada en la fabricación del mueble, acarrea diferentes afecciones a la salud del carpintero. Las maderas blandas (coníferas) son irritantes, alergénicas, y con el tiempo pueden llegar a generar asma ocupacional y EPOC. El polvo de madera dura (no-coníferas) ha sido asociado con varios tipos de cáncer, incluyendo el nasal, pulmón y tracto gastrointestinal, y la enfermedad de Hodgkin.La diferencia entre las fibras de coníferas y no-coníferas no siempre es fácil. Las fibras de las coníferas son largas, desgarradas y encintadas. La mayoría de las fibras de no-coníferas son de paredes gruesas y cortas. Estas características morfológicas de las fibras de las coníferas hace presumible que estas puedan asirse fuertemente a los tejidos blandos de la nariz y los pulmones que las fibras de no-coníferas, aunque los efectos sean mas letales en estas últimas, sin embargo la aparición del cáncer nasal y pulmón es más tardía, que los problemas respiratorios e irritaciones provocadas por las fibras de las coníferas. Un hecho igualmente grave en el acabado de madera es la presencia de elementos químicos derivados de la pintura y barnices, como Ca, K, Na y Cr, considerado éste último como cancerígeno.Una de las principales actividades económicas del departamento del Quindío (eje cafetero colombiano) es el sector maderero desde el cultivo de árboles hasta su transformación en muebles, ventas de productos terminados y de subproductos. Se realizó un muestreo por conveniencia a 10 carpinterías más representativas del Quindío y se encuestaron el 100% de los trabajadores de las áreas de lijado, cepillado, inmunizado y pinturas (trabajadores con mayor riesgo de adquirir enfermedades respiratorias crónicas). Se detectó el uso de maderas duras y blandas y la utilización para el acabado de la madera noble, de plaguicidas, solventes orgánicos volátiles, resinas epóxicas sintéticas, pegamentos y pinturas. La concentración de material particulado estaba por encima del TLV indicado para el polvo de madera (15 veces más). El análisis de morbi-mortalidad laboral concluyó que el riesgo relativo era del 81%, lo que evidencia que la exposición continua al polvo de madera incide en la aparición de patologías respiratorias y por ende al absentismo laboral.Considerando importante la protección respiratoria del carpintero, se realizaron pruebas experimentales para verificar la eficacia en la retención de las partículas del polvo de madera de los tejidos de las mascarillas desechables de uso común y otros tipos de tejido (tafetán y Jacquard). Se construyó un microambiente laboral y se sometieron los diferentes tipos de tejidos a una simulación de condiciones normales y extremas de exposición al polvo de madera. Los resultados nos revelaron que en condiciones extremas, las típicas mascarillas desechables de uso común, pierden su efecto protector al cabo de un par de horas de exposición, a pesar de tener hasta 3 capas. En condiciones normales o de baja producción de polvo, tanto los tejidos estudiados como las mascarillas desechables, logran su efecto protector. El tejido tipo tafetán ha sido el que mayor eficacia de retención de partículas ha presentado frente a las pruebas de exposición normal y extrema. Además, ha resultado ser el más eficaz para retener partículas < 20 micrometros. Estos resultados coinciden con la simulación de Monte Carlo de retención de partículas.

  • Fabricación de membranas cerámicas de MF/UF por slip coating de gran formato parra aplicaciones específicas de tratamiento de aguas

     Cusido Fabregas, Juan Antonio; Cremades Oliver, Lazaro Vicente; Rafael, Mulero; Josep, Ena
    Soluciones Tecnológicas al Alcance de las PYMES: Sector Tratamiento y Control de Aguas
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    Comparative study of the performance of three cross-flow ceramic membranes for water treatment  Open access

     Cremades Oliver, Lazaro Vicente; Rodríguez-Grau, Esteban; Rafael, Mulero; Cusido Fabregas, Juan Antonio
    Water SA
    Date of publication: 2007-04
    Journal article

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    Several tests using water as effluent are used to analyse the performance of three types of microfiltration cross-flow ceramic membranes. Two of these membranes are commercial (Atech and Membralox/US Filter) and the third one is experimental. The main differences between them lie in their chemical composition (different origin of raw materials) and in their manufacturing process. The results presented here show the dominant effect of the filtering and the gel layer. Both are formed during operation acting as equalising agent between the three membranes. The membranes tested have similar performances in cross-flow operation, although permeability rates for the membrane Membralox/US Filter were about 15% higher. This increase might be due to the smoother surface formed by a second filtering ultrafiltration layer (0.01 ìm) of 10 ìm width, which probably contributes to a decrease in the thickness of the gel layer formed during operation. Using specific raw materials (non-industrial) as well as a second ultrafiltration layer improves the results in operation (performances and cleaning intervals). However, they are uneconomical because of the extra costs involved. In conclusion, low-cost membranes can achieve similar results to the commercial and more expensive ones opening up their application to new uses and emergent markets.

    Several tests using water as effluent are used to analyse the performance of three types of microfiltration cross-flow ceramic membranes. Two of these membranes are commercial (Atech and Membralox/US Filter) and the third one is experimental. The main differences between them lie in their chemical composition (different origin of raw materials) and in their manufacturing process. The results presented here show the dominant effect of the filtering and the gel layer. Both are formed during operation acting as equalising agent between the three membranes. The membranes tested have similar performances in cross-flow operation, although permeability rates for the membrane Membralox/US Filter were about 15% higher. This increase might be due to the smoother surface formed by a second filtering ultrafiltration layer (0.01 ìm) of 10 ìm width, which probably contributes to a decrease in the thickness of the gel layer formed during operation. Using specific raw materials (non-industrial) as well as a second ultrafiltration layer improves the results in operation (performances and cleaning intervals). However, they are uneconomical because of the extra costs involved. In conclusion, low-cost membranes can achieve similar results to the commercial and more expensive ones opening up their application to new uses and emergent markets.

  • Obtención de membranas cerámicas de bajo coste para micro y ultrafiltración tangencial.

     LUIS RODRÍGUEZ GRAU, ESTEBAN
    Defense's date: 2005-06-15
    Department of Physics and Nuclear Engineering, Universitat Politècnica de Catalunya
    Theses

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  • Estudio, Formulación y Obtención de Membranas Cerámicas de Bajo Coste destinadas a Tratamientos Terciarios de Aguas Residuales

     Cusido Fabregas, Juan Antonio; Cremades Oliver, Lazaro Vicente; Mulero Vidales, Rafael; Rodríguez Grau, Esteban; García Belinchón, Carmen
    Date: 2005-03
    Report

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  • Planta de ensayos para la caracterización de membranas cerámicas

     García, C; Rodríguez, E; Cremades Oliver, Lazaro Vicente; Cusido Fabregas, Juan Antonio
    International Congress on Project Engineering
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  • Planta de ensayos para la caracterización de membranas cerámicas de bajo coste para MF y UF en filtración tangencial

     García, C; Rodríguez, E; Cremades Oliver, Lazaro Vicente; Cusido Fabregas, Juan Antonio
    International Congress on Project Engineering
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  • Premi Empresa JUSTINOX al millor PFC en l'ambit de Medi Ambient

     Cremades Oliver, Lazaro Vicente; Manuel, Ortiz; Ramón, Pedra; Cusido Fabregas, Juan Antonio
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  • Gaseous emissions from ceramics manufactured with urban sewage sludge during firing processes

     Cusido Fabregas, Juan Antonio; Cremades Oliver, Lazaro Vicente; González Benítez, María Margarita
    Waste management
    Date of publication: 2003-05
    Journal article

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    The re-use of sewage sludge without any treatment as primary material¿mixed with clays¿in order to obtain structural ceramics for buildings has been successfully improved. In the Ecobrick® project, the firing of a mixture of specific percentages of three components (clays, sludges and forest debris) resulted in a lighter and more thermal and acoustic insulating brick, compared with conventional clay-bricks. Volatile organic compounds (VOC) emission from the manufacturing of ceramics is the most important aspect to control. In the Ecobrick® project VOC emissions were monitored by using a bench-scale furnace. The study was conducted using an EPA recommended sampling train and portable sampling tubes that were thermally desorbed and analyzed by gas chromatography/mass spectrometry. Drying of raw sewage-sludge and firing processes were considered separately. In this paper, we present VOC emissions coming from the firing step of the Ecobrick® production

    The re-use of sewage sludge without any treatment as primary material—mixed with clays—in order to obtain structural ceramics for buildings has been successfully improved. In the Ecobrick® project, the firing of a mixture of specific percentages of three components (clays, sludges and forest debris) resulted in a lighter and more thermal and acoustic insulating brick, compared with conventional clay-bricks. Volatile organic compounds (VOC) emission from the manufacturing of ceramics is the most important aspect to control. In the Ecobrick® project VOC emissions were monitored by using a bench-scale furnace. The study was conducted using an EPA recommended sampling train and portable sampling tubes that were thermally desorbed and analyzed by gas chromatography/mass spectrometry. Drying of raw sewage-sludge and firing processes were considered separately. In this paper, we present VOC emissions coming from the firing step of the Ecobrick® production

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    Innovación en el tratamiento de fangos en una ETAP : secado por atomización y su aprovechamiento en la industria cerámica  Open access

     Armenter, J L; Roca, J C; Arteaga, F; Cusido Fabregas, Juan Antonio; Cremades Oliver, Lazaro Vicente
    Tecnología del agua
    Date of publication: 2003-01
    Journal article

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    La potabilización de aguas superficiales por medio de tratamientos fisicoquimicos genera un volumen de lodos de aproximadamente el 15% del volumen total de agua tratada, cuyo destino final segun la legislación vigente deberá ser en la mayoria de los casos un vertedero para tal efecto, lo que conlleva para el explotador unos costes importantes de transporte y de derecho de vertido. En España se producen unas 120.000 ton/año de este residuo en mas de 200 ETAPs. Desde 1995 Aguas de Barcelona ha estado trabajando en su ETAP de Sant Joan Despí en el diseño e implantación de una instalación para transformar este residuo en un producto con valor añadido. Para ello, a partir de una instalación convencional de tratamiento de fangos, mediante espesamiento y deshidratación por centrifugación, se pasa a una segunda etapa innovadora, consistente en el secado de lodos por atomización;proceso que genera un polvo cerámico con una humedad de entre el 3 y el 5%, que puede ser comercializado en el mercado de la elaboración de ceramica de calidad.

    La potabilizaci6n de aguas superficiales por medio de tratamientos fisicoquimicos genera un volumen de lodos de aproximadamente el 15% del volumen total de agua tratada, cuyo destino final segun la legislación vigente deberá ser en la mayoria de los casos un vertedero para tal efecto, lo que conlleva para el explotador unos costes importantes de transporte y de derecho de vertido. En España se producen unas 120.000 ton/año de este residuo en mas de 200 ETAPs. Desde 1995 Aguas de Barcelona ha estado trabajando en su ETAP de Sant Joan Despí en el diseño e implantación de una instalación para transformar este residuo en un producto con valor añadido. Para ello, a partir de una instalación convencional de tratamiento de fangos, mediante espesamiento y deshidratación por centrifugación, se pasa a una segunda etapa innovadora, consistente en el secado de lodos por atomización;proceso que genera un polvo cerámico con una humedad de entre el 3 y el 5%, que puede ser comercializado en el mercado de la elaboración de ceramica de calidad.

  • AEROGENERADOR DE SUSTENTACIÓN SUPERCONDUCTORA

     Cremades Oliver, Lazaro Vicente; Cusido Fabregas, Juan Antonio
    Date of request: 2003-12-03
    Invention patent

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    Aerogenerador de sustentación superconductora.

    La presente invención introduce un nuevo concepto de aerogenerador que no necesita sistemas mecánicos de acoplamiento, como puede ser el sistema multiplicador del aerogenerador convencional, ya que se sustituye por un sistema donde la turbina o rotor se sustenta o levita en posición horizontal sobre una plataforma que hace las funciones de inducido o estator, además de alojar unos materiales superconductores que, a la temperatura adecuada y enfrentados a un campo magnético externo, producen el efecto de levitación, y por tanto de cojinete sin rozamientos mecánicos. La turbina con sus aspas se dispone de forma horizontal y todo el sistema está encerrado en una carcasa vertical, con una o más aberturas en su parte inferior para poder canalizar el aire hacia la turbina. Tal sistema es capaz de hacer las funciones de generador eléctrico, ya que la turbina dispone de imanes permanentes, que realizan las funciones de inductor o rotor.

  • Innovación en el tratamiento de fangos de una ETAP. Secado por atomización y aprovechamiento en la industria cerámica

     Armenter, J Ll; Cristià, J; Cusido Fabregas, Juan Antonio; Arteaga, F; Cremades Oliver, Lazaro Vicente
    XXII Jornadas Técnicas de la Asociación Española de Abastecimientos de Agua y Saneamiento
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  • Raw material production for ceramic lining industry from drinking water treatment sludges: case of St. Joan Despí (Barcelona) Plant

     Cantó, J; Armenter, J Ll; Cristià, J; Arteaga, F; Cremades Oliver, Lazaro Vicente; Cusido Fabregas, Juan Antonio
    Management of Wastes from Drinking Water Treatment
    Presentation's date: 2002-09-12
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  • Recovery and treatment of spirulina platensis cells cultured in a continous photobioreactor to be used as food

     Morist, A; Montesinos, J L; Cusido Fabregas, Juan Antonio; Godia, F
    Process biochemistry
    Date of publication: 2001-12
    Journal article

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    he development of auto-regenerative biological life support systems for men in Space will be based on photosynthetic organisms, such as higher plants and algae, providing edible material. In this work, Spirulina platensis grown in a continuous photobioreactor was used to design a process for its recovery and further treatment to be used as food. Two different possibilities are studied (liquid or dry food). In each case, different steps are considered in the design of the process and further characterised: cell harvesting, washing, pasteurisation and spry-drying. Special emphasis is made on biomass quality, both in terms of potential microbial contamination and changes in its composition during the different steps of the process. Cell harvesting was conducted with a net recovery of solids and water higher than 95% with a solids concentration factor about 20¿30. Biomass quality was shown as satisfactory in all the treatments tested.

    The development of auto-regenerative biological life support systems for men in Space will be based on photosynthetic organisms, such as higher plants and algae, providing edible material. In this work, Spirulina platensis grown in a continuous photobioreactor was used to design a process for its recovery and further treatment to be used as food. Two different possibilities are studied (liquid or dry food). In each case, different steps are considered in the design of the process and further characterised: cell harvesting, washing, pasteurisation and spry-drying. Special emphasis is made on biomass quality, both in terms of potential microbial contamination and changes in its composition during the different steps of the process. Cell harvesting was conducted with a net recovery of solids and water higher than 95% with a solids concentration factor about 20–30. Biomass quality was shown as satisfactory in all the treatments tested.

  • HTSC Technology for wind energy systems: the levitating turbine

     Cusido Fabregas, Juan Antonio; Cremades Oliver, Lazaro Vicente; Riba, J; Granados García, Xavier; Obradors Berenguer, Xavier
    VI World Renewable Energy Congress 2000
    Presentation's date: 2000-07-01
    Presentation of work at congresses

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  • Nuevos materiales cerámicos para la construcción mediante valorización de lodos de aguas residuales urbanas. Proyecto ECOBRICK

     Cusido Fabregas, Juan Antonio; Cremades Oliver, Lazaro Vicente
    International Congress on Project Engineering
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  • HTSC technology for wind energy sustems: the levitating turbine

     Cusido Fabregas, Juan Antonio; Cremades Oliver, Lazaro Vicente; Riba, J; Granados García, Xavier; Obradors Berenguer, Xavier
    Renewable energy
    Date of publication: 2000-09
    Journal article

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  • Elemento cerámico de construcción para el aprovechamiento de lodos de depuradora

     Cusido Fabregas, Juan Antonio
    Date of request: 1999-08-20
    Invention patent

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    "Elemento cerámico de construcción para el aprovechamiento de lodos de depuradora".

    Se obtiene mediante la siguiente secuencia de operaciones: a) se mezcla Lodo de Depuradora (LD) con Residuo Forestal (RF) triturado en una proporción LD:RF de entre 80:20 y 65:35; b) se mezcla el compuesto así obtenido con arcilla cerámica seca en una proporción (LD+RF): (arcilla) de aproximadamente 40:60; c) a la mezcla anterior se le añade la cantidad necesaria de agua; d) y el elemento cerámico se termina mediante secado y cocción convencionales. La temperatura máxima de cocción está comprendida entre 900 y 1.100°C. El elemento cerámico es útil como material de construcción, preferentemente en forma de ladrillo o bloque y presenta las ventajas de menor densidad y mayor aislamiento térmico y acústico; además su fabricación conlleva el beneficio medioambiental de permitir la eliminación no-contaminante de los residuos urbanos.

  • Elemento cerámico para el aprovechamiento de lodos de depurador urbano y procedimiento de recuperación

     Cusido Fabregas, Juan Antonio
    Date of request: 1999-08-20
    Invention patent

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    Procedimiento para la fabricación de un elemento cerámico para el aprovechamiento de lodos de depuradora urbana y elemento cerámico obtenido con dicho procedimiento.

    El procedimiento comprende las etapas de mezclar un compuesto de tierras arcillosas convencionales con lodos de depuradora urbana en una proporción arcilla: lodo de 97:3 a 55:45 en relación al peso de materia seca, o bien si se utiliza algún elemento granular adicional en relación lodo:elemento adicional 20:80 a 80:20 que a su vez esta proporción de mezcla está relacionada con la arcilla:mezcla) de 97:3 a 50:50 en relación al peso de la materia seca; añadir a la mezcla anterior, en caso necesario, una cantidad de agua para proporcionar la humedad adecuada para el extrusionado y moldeo del elemento cerámico; y acabado del elemento cerámico mediante secado y cocción. Se obtiene un elemento cerámico cuya distribución de tamaño de poro sigue aproximadamente la distribución de Füller.

  • Valorización de los fangos de estación de tratamiento de agua potable (ETAP), en materiales de construcción: cerámica estructural y cerámica de revestimiento

     Arteaga Nuñez, Francisco
    Defense's date: 1998-03-27
    Department of Physics and Nuclear Engineering, Universitat Politècnica de Catalunya
    Theses

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  • Nuevos materiales cerámicos para la construcción mediante revalorización de lodos de aguas residuales urbanas: Proyecto Ecobrick

     Devant Guille, Martí
    Defense's date: 1997-11-18
    Department of Physics and Nuclear Engineering, Universitat Politècnica de Catalunya
    Theses

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  • REUTILITZACIÓ DE FANGS DE DEPURADORES

     Cusido Fabregas, Juan Antonio
    JORNADES SOBRE REUTILITZACIÓ DE FANGS DE DEPURACIÓ D'AIGÜES RESIDUALS URBANES.
    Presentation's date: 1996-03-13
    Presentation of work at congresses

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  • Access to the full text
    Aplicaciones de la termografía infraroja y la espectrorradiometría en el estudio del deterioro del patrimonio nacional  Open access

     Cusido Fabregas, Juan Antonio; Devant Guille, Martí; Riba Vilanova, Josep
    Informes de la construcción
    Date of publication: 1996-06
    Journal article

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    Son conocidos los problemas que la acción de los agentes atmosféricos causa a nuestro patrimonio monumental. Sin duda, el aumento de la contaminación atmosférica contribuye a aumentar las causas naturales del deterioro de las piedras que constituyen nuestro legado histórico. Lamentablemente, el conocimiento científico parcial de las causas que producen el denominado "mal de piedra", ha conllevado a restauraciones inapropiadas que, en no pocas ocasiones, lejos de solucionar el problema, han incrementado el proceso de deterioro o degradación. La necesidad de encontrar métodos de diagnóstico rápidos y eficientes, especialmente los denominados como técnicas de análisis no destructivos, ha dado lugar a la aplicación de la Termografía Infrarroja (TIR) y la Espectrorradiometría (ER) como herramientas de apoyo al estudio del deterioro de las piedras monumentales y cuyos primeros resultados presentamos en este trabajo.

    Son conocidos los problemas que la acción de los agentes atmosféricos causa a nuestro patrimonio monumental. Sin duda, el aumento de la contaminación atmosférica contribuye a aumentar las causas naturales del deterioro de las piedras que constituyen nuestro legado histórico. Lamentablemente, el conocimiento científico parcial de las causas que producen el denominado "mal de piedra", ha conllevado a restauraciones inapropiadas que, en no pocas ocasiones, lejos de solucionar el problema, han incrementado el proceso de deterioro o degradación. La necesidad de encontrar métodos de diagnóstico rápidos y eficientes, especialmente los denominados como técnicas de análisis no destructivos, ha dado lugar a la aplicación de la Termografía Infrarroja (TIR) y la Espectrorradiometría (ER) como herramientas de apoyo al estudio del deterioro de las piedras monumentales y cuyos primeros resultados presentamos en este trabajo.

  • Ecobrick : a new ceramic material for solar buildings

     Cusido Fabregas, Juan Antonio; Devant Guille, Martí; Celebrovsky, M.; Riba Vilanova, Josep; Arteaga, F.
    Renewable energy
    Date of publication: 1996-08
    Journal article

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    Ceramic materials technology has been known for a very long time. In the construction field, ceramics are considered ecological or natural materials with acceptable structural and thermal characteristics. Besides, these characteristics can be improved by changing the composition of the raw material. In this respect the Ecobrick(R) Project aims at optimizing some of those properties and achieving thereby important environmental benefits. In our study, we used sludges from urban wastewater treatment plants together with other wastes and clays, to produce a new ceramic material suitable for construction. When using Ecobrick(R), energy consumption can be reduced up to 49% and the Solar Saving Fraction will increase up to 14% compared both to conventional ceramics.

    Ceramic materials technology has been known for a very long time. In the construction field, ceramics are considered ecological or natural materials with acceptable structural and thermal characteristics. Besides, these characteristics can be improved by changing the composition of the raw material. In this respect the Ecobrick(R) Project aims at optimizing some of those properties and achieving thereby important environmental benefits. In our study, we used sludges from urban wastewater treatment plants together with other wastes and clays, to produce a new ceramic material suitable for construction. When using Ecobrick(R), energy consumption can be reduced up to 49% and the Solar Saving Fraction will increase up to 14% compared both to conventional ceramics.

  • MATERIALES AISLANTES TRANSPARENTES. APLIC. A VIV. BIFAMILIAR EN CLIMA MEDIT.

     Cusido Fabregas, Juan Antonio
    VII CONGRESO IBÉRICO DE ENERGÍA SOLAR
    Presentation's date: 1994-05-30
    Presentation of work at congresses

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  • ACCESSIT

     Cusido Fabregas, Juan Antonio
    Award or recognition

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  • EXPERIENCIA DEL PROGRAMA DE ASESORAMIENTO ENERGETICO EN EL SECTOR TERCIARIO Y

     Cusido Fabregas, Juan Antonio
    VII CONGRESO IBÉRICO DE ENERGÍA SOLAR
    Presentation's date: 1994-05-30
    Presentation of work at congresses

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  • Aillament transparent d'edificis : conservació i gestió de l'energia

     Cusido Fabregas, Juan Antonio
    Eficiencia energetica
    Date of publication: 1994-02
    Journal article

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  • ELEMENTO CERAMICO DE CONSTRUCCION PARA EL APROVECHAMIENTO DE LODOS DEPURADORA

     Cusido Fabregas, Juan Antonio
    Date of request: 1994-04-01
    Invention patent

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  • Experiences on solar passive demonstration projects

     Cusido Fabregas, Juan Antonio; Devant Guille, Martí
    EFFICIENT SOLAR THERMAL SYSTEMS IN BUILDINGS
    Presentation of work at congresses

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  • A practical tool for sizing optimal shading devices

     Jorge Sanchez, Juan; Puigdomenech Franquesa, Joan; Cusido Fabregas, Juan Antonio
    Building and environment
    Date of publication: 1993-01
    Journal article

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    A nomogram is presented for use in regions with a Mediterranean climate. Architects can use this tool as an easy way to optimize the design of shading devices. The nomogram allows the performance of a proposed external fixed shading device to be evaluated. The input variables required are (i) the location of the building, (ii) the orientation of the facade and (iii) two adimensional characteristics corresponding to the opening-shading device system. The accuracy reaches its minimum value during intermediate seasons but the margin of error is less than 10%.

    A nomogram is presented for use in regions with a Mediterranean climate. Architects can use this tool as an easy way to optimize the design of shading devices. The nomogram allows the performance of a proposed external fixed shading device to be evaluated. The input variables required are (i) the location of the building, (ii) the orientation of the facade and (iii) two adimensional characteristics corresponding to the opening-shading device system. The accuracy reaches its minimum value during intermediate seasons but the margin of error is less than 10%.

  • Els sistemes de refrigeració natural als edificis

     Cusido Fabregas, Juan Antonio
    Conservació i gestió de l'energia
    Date of publication: 1993-02
    Journal article

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  • Situación actual y perspectivas de futuro en las normativas técnicas de los ED

     Cusido Fabregas, Juan Antonio
    MI: montajes e instalaciones
    Date of publication: 1993-03
    Journal article

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  • ECOBRICKS: MATERIAL CERAMICO ELABORADO CON LODOS DE DEPURACION.

     Cusido Fabregas, Juan Antonio; Elías Castells, Xavier
    Date of request: 1993-02-12
    Invention patent

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  • Estudi de la capa fronterera atmosférica

     Cusido Fabregas, Juan Antonio; Conangla Triviño, Laura; Ferreres Soler, Enriqueta
    Participation in a competitive project

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  • Refrigeracio natural als edificis

     Mitja, A; Cusido Fabregas, Juan Antonio; Jorge Sanchez, Juan; Puigdomenech Franquesa, Joan
    Date of publication: 1992-01-02
    Book

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  • L'ART DE VIURE BE

     Cusido Fabregas, Juan Antonio; Puigdomenech Franquesa, Joan; Jorge Sanchez, Juan; Cendra Garreta, Jaume; Bobes Picornell, Arcadio de
    Date of publication: 1992-04
    Book

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  • ESTUDI CONJUNT BIOCLIMATIC DE BEGUES

     Cusido Fabregas, Juan Antonio; Devant Guille, Martí; Cendra Garreta, Jaume
    Date: 1992-09
    Report

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  • VIABILITAT CENTRE DE RECERCA

     Cusido Fabregas, Juan Antonio; Devant Guille, Martí
    Date: 1992-02
    Report

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  • ESTUDI DEL COMPORTAMENT TERMIC DEL CONJUNT BIOCLIMATIC DE BEGUES

     Cusido Fabregas, Juan Antonio; Cendra Garreta, Jaume; Devant Guille, Martí
    Date: 1992-10
    Report

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