Feedback on experience at DWTP with reverse osmosis: el Prat de Llobregat (2009-2012)

ósmosis inversa-Since 2009, Aigües del Prat has produced over 90% of the drinking water in the municipality of El Prat without interruption by means of two reverse osmosis DWTPs

Since 2009, Aigües del Prat has produced over 90% of the drinking water in the municipality of El Prat without interruption by means of two reverse osmosis DWTPs. This article, which was presented at the 32nd AEAS Conference in San Sebastian in mid-June, outlines the experience acquired in the period 2009-2012 with respect to: operation & maintenance and associated costs, reliability, quality control of distributed water, groundwater quality trends and management, water quality changes in the network, experience in the demonstration plant for permeate remineralisation, public perception, feedback and the resulting lessons learned.

There is wide knowledge of the origin, main characteristics and historical evolution of the Llobregat Delta aquifer. Similarly, due to the salinisation of the aquifer following contamination with volatile organic compounds, the reason for the construction of the DWTPs with membrane technology, specifically reverse osmosis technology, was widely publicised. Aigues Ter Llobregat (ATLL) was responsible for the management of the construction of the treatment plants. Construction, assembly and commissioning was carried out by Veolia Water Systems Ibérica in 2009 and operation and maintenance of the plants is the responsibility of publicly owned company Aigües del Prat.

Evolution of the aquifer, care of the exploitation of supply wells, which have their source in the aforementioned aquifer, monitoring and control of maintenance and operation tasks, and continuous analytical monitoring at different points of the supply network have enabled water of excellent quality, compliant with the provisions of RD 140/2003, to be supplied to different types of industry and the public, most of whom are in favour of the initiatives undertaken. Unlike other similar facilities, the plants operate on a daily basis to satisfy 90% of demand.

Juan Manuel Ortega Díaz, Technical Department, Veolia Water Solutions & Technologies
Idoia García Velasco, Process Engineer, Veolia Water Solutions & Technologies
Joan Sanz Ataz Technical department, Veolia Water Solutions & Technologies
Aureliano García Ruz, Technical Department, Aigües del Prat
Carlos Miguel Centeno, Head of ATLL desalination plant

Article published in: FuturENVIRO September 2013