Method and apparatus for biological wastewater purification
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United States of America Patent
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Jun 12, 2012
Grant Date -
Jan 21, 2010
app pub date -
Jul 20, 2007
filing date -
Jul 28, 2006
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Abstract
A biological wastewater is mixed in an activated sludge tank with activated sludge that is concentrated in the activated sludge tank to a predetermined value. The mixture of wastewater and activated sludge running off in a drain of the activated sludge tank is then sieved to effect an incomplete solid/liquid separation that leaves a separated solid phase in the activated sludge tank. The liquid phase including a remnant of solids is then removed from the tank.
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