Ultrafiltration zur Trinkwasseraufbereitung in kleinen Wasserwerken Bayerns : Angewandte Membrantechnologie in Wasserwerken

In Bavaria, many drinking water supplies use groundwater containing high turbidity and fecally derived micobes as raw water for drinking water production. Furthermore, the companies are very small and require both reliable and low cost solutions to purify the water. Chlorination or UV-radiation as disinfection measures are usually employed. However, an efficient filtration step to remove turbidity is required. Over a period of two-and-a-half years ultrafiltration was tested at small water companies under practical conditions. First results show a very high elimination of particles including all pathogenic organisms. These high elimination rates meet with extraordinary reliability and comparative low running costs. The variability of raw water quality has different effects on the operation of different treatment plants. Therefore, planning of ultrafiltration has to be very careful, using pilot systems as a method of testing. Ultrafiltration of microbial contaminated raw water seems to be a reliable and economical method of drinking water treatment for small water companies.