Liquid purification or separation – Processes – Treatment by living organism
Patent
1988-10-21
1990-02-27
Wyse, Tom
Liquid purification or separation
Processes
Treatment by living organism
210609, 210614, 210621, 210630, C02F 1104
Patent
active
049043889
ABSTRACT:
An apparatus for sludge thickening including a sludge thickener allowing suspended solids of sludge supplied thereto to settle by their own weight while being thickened. The sludge supplied to the sludge thickener is subjected to aeration for a predetermined period of time in a sludge aerator. Aeration of the sludge strips the anaerobic gas, which is attached to the suspended solids in the form of bubbles or dissolved in the sludge, to atmosphere. By aeration of the sludge before being fed to the sludge thickener, floating of the thickened sludge in the thickener can be avoided.
REFERENCES:
patent: 4062770 (1977-12-01), Kneer
patent: 4130481 (1978-12-01), Chase et al.
patent: 4192740 (1980-03-01), Savard et al.
patent: 4352738 (1982-10-01), Blay et al.
patent: 4437992 (1984-03-01), Saito et al.
Baba Kenji
Ogasawara Hitoshi
Watanabe Shoji
Yahagi Hayao
Hitachi , Ltd.
Wyse Tom
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