Activated sludge treatment method of waste water
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United States of America Patent
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-
May 26, 1981
Issued Date -
N/A
app pub date -
Jan 4, 1980
filing date -
Apr 15, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An activated sludge treatment method of waste water which comprises (a) the step of micronizing as far as possible the sludge in the waste water containing the BOD component to a degree not to have the cells of the microorganisms therein broken or destroyed and adsorbing the BOD component to the micronized sludge, and (b) the step of oxidizing the BOD component adsorbed to the sludge by blowing in an oxygen-containing gas and flocculating the sludge. By this method, the treatment of waste water is accomplished with a shortened residence time of the waste water in an installation for the treatment and with the production of excess sludge in a considerably reduced amount.
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