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Category: Separation Technology
Question: How can the water removal of anaerobically digested municipal sludge be improved?
Keywords: sludge,treatment,additional,water,removal,peak,process
Answer: Sludge from anaerobic digesters typically contains 70-80% water, most of which is trapped in cellular material. Peak Treatment Systems has developed process to remove additional water from these sludge streams. The slude is heated to 180 0F at 250 psig by steam for 1-2 seconds. The stream is then flashed to atmospheric pressure. This breaks 20% of the cell walls and softens the rest. The remaining cell walls can be broken by agitation and additional water can be removed. The yield from the Peak process is a medium Btu gas and a 40-45% solids cake which can be used for composting.