Power-saving process for waste-water treatment
The aim of this project was to build a demonstration plant for anaerobic treatment of domestic waste waters in a seaside town with a large summer population. The plant, built in Biscarrosse (France) was designed to receive a maximum pollution flow for 10,000 inhabitants. It consists of a circular sludge bed fermentor of 950 m3, covered with soft PVC, and a 10 metre diameter settling tank. The results obtained can be summarised as follows: i) for a pollution flow corresponding to 5,000 inhabitants, depollution rates were 56% on BOD(5), 52% on COD and 67% on DSS (dry suspended solids); ii) for a pollution flow corresponding to 10,000 inhabitants, depollution rates were 47% on BOD(5), 43% on COD and 60% on DSS. From the economic standpoint, since production of sludge and operating costs are very low, the additional cost of a plant including an anaerobic stage and a finishing aerobic stage, compared to the cost of a conventional aerobic plant, can be paid off in less than two years.
Bibliographic Reference: EUR 13090 EN (1990) 27 pp., FS, ECU 5
ISBN: ISBN 92-826-1958-3
Record Number: 199110012 / Last updated on: 1994-12-02
Original language: en
Available languages: en,fr