Grease and scum removal in a filtration apparatus comprising a membrane bioreactor and a treatment vessel for digesting organic materials
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United States of America Patent
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Feb 12, 2008
Grant Date -
Apr 19, 2007
app pub date -
Dec 21, 2005
filing date -
Dec 22, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a membrane bioreactor process combined with an advanced biological sludge digestion process that provides significant improvements in sludge digestion by reducing the costs and resources required for disposing of digested sludge. The offline treatment vessel is used to solubilize the organic material by operating in a very low oxygen environment. Digested process fluid is transferred back to the membrane bioreactor. The processes and apparatus substantially reduce the production of waste sludge. The device includes one or more weirs operable to remove grease and scum.
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