METHOD OF PURIFICATION OF THE RESIDENTIAL AND INDUSTRIAL WASTE WATERS Russian patent published in 2007 - IPC C02F3/02 C02F3/12 

FIELD: environmental protection; methods of purification of the residential and industrial waste waters.

SUBSTANCE: the invention is pertaining to the method of purification of the residential and industrial waste waters and may be used at the biological purification off the residential and industrial waste waters in the aerotanks or biotanks. The method of purification of these waste waters includes their mixing with the active slime, aeration of the slime mixture stream in the aerotank, separation of the slime mixture and the activated slime return into the aerotank. At that waste waters are fed into the chamber of the preliminary purification, from which the waters are pumped out by the pump into the aerotank at the rate of the stream exceeding consumption of the waste waters fed to the purification with return of the corresponding difference to consumption in the form of the water- slime mixture from the aerotank outlet into the chamber of the preliminary purification. This difference is calculated from the condition of actuation of the level of the waste waters in the chamber of the preliminary purification prior to the mark, at which the pump is switched off for the time period, during which the chamber of the preliminary purification is filled-up with the incoming waste waters ensuring the preset parameters of the active slime loading by the organic impurities in the mode of the intermittent aeration. The technical result of the invention is the increased quality of purification of the residential and industrial waste waters, the reduced capital and operational expenditures.

EFFECT: the invention ensures the increased quality of purification of the residential and industrial waste waters, the reduced capital and operational expenditures.

2 cl, 1 dwg