METHOD OF TREATING WASTE WATER Russian patent published in 2011 - IPC C02F3/02 C02F3/12 C02F9/14 C02F103/32 

FIELD: chemistry.

SUBSTANCE: invention relates to treatment of concentrated waste water, particularly waste water from confectionary companies. Waste water which contains a large amount of organic contaminants undergoes primary settling to remove suspended substances. The treated water is then fed into a step I aerotank where is it aerated for 1.076 days while maintaining the dose of active sludge in amount of 3.4 g/l. A portion of the active sludge is removed in the settling tank. Further, the treated water is fed into a step II aerotank where it is aerated for 0.58 days while maintaining the dose of active sludge at 2.04 g/l. Before releasing into a water body, the treated waste water is fed into a settling tank to remove active sludge.

EFFECT: high efficiency of treating waste water.

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