Liquid purification or separation – Processes – Treatment by living organism
Patent
1998-11-02
2000-08-22
Simmons, David A.
Liquid purification or separation
Processes
Treatment by living organism
210609, 210623, 210624, 210626, 210630, 210790, 210806, 210906, 210259, C02F 302
Patent
active
061067172
ABSTRACT:
A method of treating an organic waste water, which is capable of separating and recovering phosphorus components in a liquid or solid form, is provided. According to the method of the present invention, reuse of phosphorus components can be facilitated, while the content of phosphorus components contained in a large quantity of a primary treated liquid can be reduced. The following steps are utilized in the method of the present invention: (1) an aeration step for aerobically treating a waste water; (2) a solid-liquid separation step for separating the waste water after the aeration into a primary treated liquid and a primary sludge; (3) a phosphorus component release step for releasing phosphorus components from the separated primary sludge to a liquid phase; and (4) a solid-liquid separation step for separating the primary sludge after releasing the phosphorus components into a secondary treated liquid containing the released phosphorus components and a secondary sludge essentially free from phosphorus components.
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Akashi Akira
Hasegawa Susumu
Morrison Betsey J.
Shinko Pantec Co. Ltd.
Simmons David A.
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