Day: 10 November 2004

Innovative membrane technology for potable water production in the Channel Islands, by Jack Noble, Managing Director at Zenon Environmental (UK) Ltd.

In this article we describe two recent potable water projects in the Channel Islands where Zenon ZeeWeed^TM ultrafiltration (UF) membranes have been retrofitted to meet the challenges of variable feed water quality and removal of suspended solids and pathogens such as Cryptosporidium. We describe a 13 MLD system for The States of Guernsey Water Board (SGWB), installed at St. Saviours, that was retrofitted into existing clarifier basins, and a UF system followed by reverse osmosis (RO) that produces 4 MLD of an RO permeate / raw water blend at Le Mourier on Jersey. The blended water is added to Jersey's resources to meet the peak requirement of 30 MLD. This system was retrofitted into an existing storage tank. The UF / RO system reduces the nitrate level in the blended water to below the European Commission guideline level of 50 mg/l. We also describe the configuration of the ZeeWeed^TM membrane and show how on-line measurements are used to help maintain system integrity.

Sewer Flooding: The Next Step

By Phil Wildbore, WRc Utilities

Since privatisation, water and sewerage utilities in the UK have been able to deliver almost year-on-year reductions. This applies to both the risk of properties flooding, and also to the actual incidents.

Linking WFD with development control and land-use planning

By Dr Peter Howsam, Cranfield University
Water Framework Directive should have been called Land and Water Framework Directive

UK too slow to pick up ICM

Integrated Catchment Management is highlighted as a key tool in reducing diffuse pollution and delivering the Water Framework Directive. But whilst the ideas are there, the UK water industry is being too slow in implementing an effective policy, says Dr Mark Shepherd of ADAS Catchment Management.