Treatment of waste products with anaerobic digestion
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United States of America Patent
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Sep 26, 2017
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N/A
app pub date -
Dec 10, 2015
filing date -
Feb 3, 2011
priority date (Note) -
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Abstract
A waste stream is treated by anaerobic digestion. A process is described involves a step of separating solids from digestate, and returning separated solids to a digester. Optionally, there may be a step of solids separation in which larger solids are removed from the digester. A process and apparatus are described for treating waste sludge from a wastewater treatment plant in an anaerobic digester. Feed sludge is thickened or solids are separated from digestate and returned to the digester. Additional co-digestion waste may be added to the digester. The process and apparatus may be used in a retrofit of an existing wastewater treatment plant.
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