Water Supply Vol 2 No 2 pp 289–296 © IWA Publishing 2002
Large scale pilot plant for treating flocculated reservoir water and membrane integrity monitoring
G. Hagmeyer*, R. Gimbel** and W. Dautzenberg***
*IWW Rheinisch-Westfaelisches Institut fuer Wasserforschung gemeinnuetzige GmbH, (Institut an der Universitaet Duisburg), Moritzstr.26, 45476 Muelheim, Germany. (E-mail: hagmeyer@uni-duisburg.de)
**IWW Rheinisch-Westfaelisches Institut fuer Wasserforschung gemeinnuetzige GmbH, (Institut an der Universitaet Duisburg), Moritzstr.26, 45476 Muelheim, Germany. (E-mail: gimbel.iww@uni-duisburg.de)
***WdKA Wasserwerk des Kreises Aachen, Am Filterwerk; 52159 Roetgen, Germany. (E-mail: walter.dautzenberg@ewv.de)
ABSTRACT
The Wasserwerk des Kreises Aachen in Roetgen, Germany operates with financial help of the German Ministry for Education and Research and with scientific support of the IWW (Muelheim, Germany) a large scale membrane pilot plant. This pilot is equipped with twelve 6 m long pressure vessels resulting in a membrane area of about 1,620 m2 to produce about 150 m3/h of filtrate. The pilot plant was operated first with flocculated reservoir water as feed. The results show that this is a reasonable process especially if the backflush water of the plant is further treated with another membrane plant to achieve high overall recoveries up to 98-99%.
Monitoring of membrane integrity is an important topic in this research. Every pressure vessel of the pilot can be connected to a particle counter by switching magnetic valves automatically. Corrupted fibres were detected by particle counting after about 8 month of operation. A correlation between the number of broken fibres and particle concentration in the filtrate could not be established and may not exist as it is discussed in this paper.
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