The Pre-design of Berenplaat Water-Treatment Works, Rotterdam: Additional Processes to Achieve Biologically Stable Water

• Published in: Water and environment journal : WEJ Vol. 9; no. 4; pp. 344 - 352
• Main Authors: RODMAN, D. J, VAN DE VEER, A. J., HOLMES, J. F
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.08.1995
• Subjects: Assimilable organic carbon; biologically stable water; granular activated carbon; ultraviolet disinfection
• ISSN: 1360-4015
• DOI: 10.1111/j.1747-6593.1995.tb00951.x

ABSTRACT Biological regrowth in a water distribution system can be avoided by either maintaining a free chlorine residual to suppress growth or controlling conditions which may support growth, or by a combination of both. Micro‐organisms will grow in water only if nutrients are present in sufficient amounts; conversely the reduction of biodegradable nutrients in water is vitally important in controlling the regrowth of microorganisms and zooplankton in the distribution system. The measurement of assimilable organic carbon has been developed as a way of evaluating the concentration of biodegradable material which is available to support such biological growth. This paper describes the pilot‐plant and full‐scale studies carried out at the Berenplaat water‐treatment works, Rotterdam to (a) improve disinfection, (b) eliminate the formation of trihalomethanes and other halogenated compounds formed by chlorination, and (c) reduce the final water assimilable organic carbon concentrations to very low levels, so that a high degree of biological stability can be maintained in the distribution system.