Patent ID: 6676840
Filing Date: 2004-01-13
Classification: C02F,Y10S

Abstract:
A method for removing COD created by fat and protein components from an aqueous waste stream, said method comprising:adjusting said waste stream to a pH of between about 4.5 and 6.5; treating said waste stream with an aluminate to form an aluminate and fat/protein complex, said aluminate treatment raises said solution pH from between about 4.5 and 6.5 to between about 5 and 10 and said pH is not reduced below about 4.5 prior to treating with said aluminate; adding an anionic flocculating agent to said aqueous solution in order to interact with said complex and form a plurality of insoluble flocculate particles which contain said aluminate and said fat and protein components; and removing said COD by separating at least a portion of said insoluble flocculate particles from said aqueous waste stream.