A preliminary assessment of incidental potable water reuse (IPR) in the Llobregat River basin has been conducted by estimating the dilution factor of treated effluent discharges upstream of six river flow measurement sections. IPR in the Llobregat River basin is an everyday occurrence, because of the systematic discharge of treated effluents upstream of river sections used as drinking water sources. Average river flows at the Sant Joan Despí measurement section increased from 400,000 m3/d (2007) to 864,000 m3/d (2008) and to 931,000 m3/d (2013), while treated effluent discharges upstream of that section ranged from 109,000 m3/d to 114,000 m3/d in those years. The highest degree of IPR occurs downstream of the Abrera and Sant Joan Despí flow measurement sections, from where about half of the drinking water supplied to the Barcelona Metropolitan Area is abstracted. Based on average annual flows, the likelihood that drinking water produced from that river stretch contained treated effluent varied from 25% (2007) to 13% (2008) and to 12% (2013). Water agencies and drinking water production utilities have strived for decades to ensure that drinking water production satisfies applicable quality requirements and provides the required public health protection.
Huerta, M.; Solé, J.; Aceves, M.; Valhondo, C.; Hernández, M.; Gullon, M. International UFZ-Deltares Conference on Groundwater-Soil-Systems and Water Resource Management p. 1-7 Data de presentació: 2013-04-16 Presentació treball a congrés
The Llobregat River is the main source of water supply in this area. This river together with its aquifer has suffered from several damages which had contributed to endanger a suitable ecological and hydrological status; among them, pollution is a serious problem to deal with. In the last decades, the presence of organic pollutants in this river has been demonstrated [1,2]. Some of them are persistent to biological degradation and have shown to survive wastewater treatments almost unaltered and therefore they get surface waters where in some cases become recalcitrant pollutants. In order to mitigate the effect and presence of these compounds, Soil Aquifer Treatments (SAT) could be an approach since these treatments have demonstrated to be efficient to remove or decrease concentrations of such contaminants due to physico-chemical and biological processes occurring within the subsoil . In the framework of the LIFE-ENSAT project, an organic substrate layer was installed in the basin of a recharge system located in the upper Llobregat delta aquifer. The aim was to enhance the degradation of contaminants through biochemical reactions on the reductive environment promoted in the unsaturated zone in order to improve the water quality of the system. In this work, the efficiency of this organic layer to remove organic pollutants included in European directives (2000/60/EC-2008/105/EC), such as triazines, pesticides or polyaromatic hydrocarbons (PAHs), has been evaluated. More than 80 compounds were analyzed; among them, 27 were priority pollutants while 6 were classified as preference substances (RD 60/2011).
Desde principios de este año, el efluente de la Estación de Regeneración de Aguas (ERA) de El Prat de Llobregat se emplea como un recurso alternativo para el riego de parques, jardines e instalaciones deportivas, el baldeo de calles
y la limpieza del alcantarillado en la ciudad de Barcelona. El proyecto Montjuïc ha consistido en la construcción de un sistema de traída y distribución de aguas regeneradas desde la citada ERA hasta la Montaña de Montjuïc. La inversión realizada ha ascendido a 8,1 M€, aportados por las siguientes tres instituciones: Agencia Catalana del Agua (ACA), la Entidad Metropolitana (EMSHTR) y su empresa pública EMSSA, y el Ayuntamiento de Barcelona.
The following article presents the first phase of implantation of the Centralized Management project of wastewater quality. From the Inspection and Environmental Control Service the need to implant a project
that integrates the different tasks carried out by the service arose in order to obtain the maximum benefit of them all, offering environmental services of high added value to control and reduce pollution. During the
remote control phase of water quality two Quality Stations have been initiated, one of general character at the entry of a filter system and other one of industrial character in the connection of an Industrial Estate.
The two Quality Stations have been remote controlled, therefore, conductivity sensors have been installed, as well as refreshed automatic sampling testers that work 24 hours a day, thus a pollution episode can be
characterized from the beginning. Hereby, it will be possible to have the necessary tools to reinforce the degree of knowledge and the control of the system, increasing the diagnostic capability by means of the
detection of incidents caused by spillages.
En los últimos años se han promulgado diversidad de ordenanzas de ahorro de agua. En el área metropolitana de Barcelona (600 km2 y 3.180.000 habitantes), varios municipios disponen de normas que establecen requisitos en cuanto a los sistemas de reutilización y el dimensionado de los depósitos de almacenamiento de aguas pluviales. Con el objetivo de armonizar las propuestas existentes en una futura ordenanza de ámbito metropolitano, se ha realizado un estudio pormenorizado para calcular las dimensiones óptimas de un depósito de aguas pluviales en esta área. Así pues, se han propuesto distintos escenarios considerando variables tales como la superficie de captación, la superficie de riego, usos adicionales del agua recogida (aseos, limpieza) y variaciones en el régimen de lluvias.