Method of purifying waste water

Details Method of purifying waste water Method of purifying waste water

C - Chemistry, Metallurgy

02

F

362/4

C02F 3/30 (2006.01) C02F 3/28 (2006.01)

Patent

CA 1067626

Inventors: HARALD SKOGMAN LENNART HUSS Title: A METHOD OF PURIFYING WASTE WATER Abstract: A method of biologically purifying waste water rich in carbohydrates or proteins, wherein the waste water is treated in an anaerobic stage while leading off generated methane gas, sludge-bearing water formed being subjected to sludge separation during formation of a first sludge concentrate which is returned to the anaerobic stage, and that the water thus treated is treated in an aerobic. stage, sludge-bearing water formed being subjected to sludge separation during formation of a second sludge concentrate, of which at least a portion is returned to the aerobic stage, while possible excess is returned to the anaerobic stage, a portion of the first, and possibly also of the second sludge concentrate being led off for disposal.

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