Patent ID: 8196757

Claim:
A unit for integrated waste water biological treatment, comprising: a reservoir accommodating a receiving chamber, the receiving chamber having a waste water supply, an air-lift for transferring surge inflows, an air-lift for transferring waste water, a primary filter and a means for clearing the primary filter, and float gauges for measuring a level of waste water; an aerobic tank chamber, the aerobic tank chamber having an air-lift for transferring sludge, the aerobic tank chamber in fluid communication with the receiving chamber by means of the air-lift; a secondary settling tank, the secondary settling tank having an outlet tube for discharging treated water and an air-lift for transferring a grease film into the aerobic tank chamber; an activated sludge stabilizer chamber, the activated sludge stabilizer chamber having an intermediate partition forming an additional chamber for stabilizing sludge, the intermediate partition composed of an upper part and a lower part so as to form free space between said parts, the lower part being arranged below the upper part and upright to the bottom of the activated sludge stabilizer chamber, and the upper part being arranged obliquely with respect to the lower part; aerators provided in the receiving chamber, the aerobic tank chamber and the activated sludge stabilizer chamber, respectively; and a source of compressed air for supplying air to the aerators and to the air-lifts.