Method and apparatus for treating waste water
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United States of America Patent
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-
Nov 30, 2004
Grant Date -
Jul 3, 2003
app pub date -
Sep 27, 2002
filing date -
Mar 27, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A wastewater treatment process involves solids-liquid separation after biological treatment, in which solids-liquid separation of activated sludge can be more efficiently performed. A mixture of wastewater and activated sludge obtained after biologically treating raw wastewater is introduced into a solids-liquid separation tank containing a water-permeable filter immersed therein and a dynamic filter layer of sludge is formed on the surface of the water-permeable filter to give a filtrate from the water-permeable filter.
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