Title:
ACTIVATED SLUDGE WASTEWATER TREATMENT FOR REMOVAL OF ENDOCRINE DISRUPTERS
Document Type and Number:
WIPO Patent Application WO2002079103
Kind Code:
A3
Abstract:
An activated sludge tank for treating waste water, e.g. municipal sewage, has a biofilter (31) located in the first 50 % of the length of the tank, spaced from the inlet end (25) by a first activated sludge zone, and occupying less than 40 % of the length of the tank. All the water passes through the biofilter. A second activated sludge zone (26), which is aerated, is located on the outlet end side of the biofilter (31). In the tank the activated sludge has typically an average concentration in the range of 1 to 6 g/L, and the biofilter has a biomass concentration of at least 10 g/L. The presence of the biofilter (31) increases the removal of micro-organic components such as steroid oestrogens.
Inventors:
DARTON RICHARD CHARLES (GB)
JOHNSON ANDREW CLIFTON (GB)
JOHNSON ANDREW CLIFTON (GB)
Application Number:
PCT/GB2002/001503
Publication Date:
October 16, 2003
Filing Date:
March 28, 2002
Export Citation:
Assignee:
NATURAL ENVIRONMENT RES (GB)
DARTON RICHARD CHARLES (GB)
JOHNSON ANDREW CLIFTON (GB)
DARTON RICHARD CHARLES (GB)
JOHNSON ANDREW CLIFTON (GB)
International Classes:
C02F3/06; C02F3/10; C02F3/12; (IPC1-7): C02F3/06; C02F3/12; C02F3/10
Foreign References:
| EP0341432A2 | 1989-11-15 | |||
| US5500119A | 1996-03-19 |
Other References:
GEBARA F: "Activated sludge biofilm wastewater treatment system", WATER RESEARCH, ELSEVIER SCIENCE PUBLISHERS, AMSTERDAM, NL, vol. 33, no. 1, January 1999 (1999-01-01), pages 230 - 238, XP004149676, ISSN: 0043-1354
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 09 31 July 1998 (1998-07-31)
A.C.JOHNSON ET AL: "Estimating steroid oestrogen inputs into activated sludge treatment works and observations on their removal from the effluent", THE SCIENCE OF THE TOTAL ENVIRONMENT, vol. 256, 2000, pages 163 - 173, XP002208650
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 09 31 July 1998 (1998-07-31)
A.C.JOHNSON ET AL: "Estimating steroid oestrogen inputs into activated sludge treatment works and observations on their removal from the effluent", THE SCIENCE OF THE TOTAL ENVIRONMENT, vol. 256, 2000, pages 163 - 173, XP002208650
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