Septage (septic-tank waste) was chemically conditioned with either aluminum sulfate, ferric chloride, or sulfuric acid. Supernatant was decanted and the thickened sludge vacuum filtered or mixed with ...
VACUUM nitration of sewage sludge, particularly surplus activated sludge from the activated sludge process of sewage treatment, is a well-established process, particularly in the United States, for ...
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