Method and apparatus for biologically purifying sewage which is

Details Method and apparatus for biologically purifying sewage which is Method and apparatus for biologically purifying sewage which is

1992-03-13

1994-11-08

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210651, 210259, C02F 144

Patent

active

053623959

ABSTRACT:
Biologically purifying sewage which is organically loaded with substances that are difficult to decompose biologically or are not decomposable biologically has the substances that are difficult to decompose biologically or are not decomposable biologically separated and concentrated to concentrate, the concentrate preferably is treated physically and/or chemically and the treated or untreated concentrate is subjected to a biological transformation or, alternatively, the concentrate is separated from the sewage to be purified. The apparatus has a filtration collecting-basin serving for concentrating the substances that are difficult to decompose biologically or not decomposable biologically, and a membrane-filtering or nanofiltering device connected thereto, in which the substances that are difficult to decompose biologically or not decomposable biologically are retained and to which the sewage with the concentrated substances that are difficult to decompose biologically or not decomposable biologically is supplied on the inlet side, and from which the purified sewage is drawn off on the outlet side.

REFERENCES:
patent: 3950249 (1976-04-01), Eger et al.
patent: 4267049 (1981-05-01), Erickson et al.
patent: 4274966 (1981-06-01), Palmer
patent: 5130025 (1992-07-01), Lefebvre et al.
European search Report, application No. 91103860.2, 3 pages.
Abstract, World Patents Index, Section CH, Week 8040, Derwent Publ. LTD London, GB; Class C, AN 80-70612C & JP-A-55 109(EBARA INFL.KK) Aug. 22, 1980.

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