Novel active sludge process with reduced excess sludge

The activated sludge new technique for reducing residual sludge comprises: adding the sludge and sewage into aeration pond for continual aerating; depositing in deposition pond, and reflowing the sludge to aeration pond; when the sludge concentration over given value, reflowing part sludge to aerati...

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Bibliographic Details
Main Author FENXIA,LI YE
Format Patent
LanguageEnglish
Published 13.06.2007
Subjects
CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary:The activated sludge new technique for reducing residual sludge comprises: adding the sludge and sewage into aeration pond for continual aerating; depositing in deposition pond, and reflowing the sludge to aeration pond; when the sludge concentration over given value, reflowing part sludge to aeration pond and discharging other out; putting decouple agent into the aeration pond as sludge ratio, then aerating with sewage, and leading the decoupled mixed liquid into deposition pond; taking anoxybiotic treatment to some sludge in storage container for 4~6h and reflowing to aeration pond for aeration and decoupling with sewage. This invention can reduce 40-50% residual sludge with small investment and simple device.
Bibliography:Application Number: CN200510061950