Method to upgrade sewage treatment plants overloaded in continuo

Details Method to upgrade sewage treatment plants overloaded in continuo Method to upgrade sewage treatment plants overloaded in continuo

1981-12-09

1983-11-22

Therkorn, Ernest G.

Liquid purification or separation

Processes

Treatment by living organism

210626, 210631, 210723, C02F 304

Patent

active

044167806

ABSTRACT:
A method to upgrade existing sewage treatment plants which become overloaded in long-term continuous operation by passing waste water or a part stream thereof through a filter device which is installed additionally prior and/or subsequent to at least one overloaded stage of the treatment plant. Thus method replaces preclarification, clearing, thickening and sludge dehydration steps for a part of waste water to be treated and also a part of the biological degradation by a simple purification process using the separated solids as an alluvial filter layer. A sewage treatment plant for waste water treatment by said method is described.

REFERENCES:
patent: 550583 (1895-12-01), Brinckman
patent: 1985435 (1934-12-01), Watson
patent: 2463464 (1949-03-01), Lind
patent: 3397139 (1968-08-01), Sak
patent: 3567629 (1971-03-01), Ayers
patent: 3623976 (1971-11-01), Cessna
patent: 3825119 (1974-07-01), Rost
patent: 4057496 (1977-11-01), Itagaki

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