Domestic sewage treatment plants PF ANVI designed for individuals houses which have not possibility connect by centralist sewerage. Domestic sewage treatment plant is calculated, that one person will comprises 60 g BOD5/d pollution, and standard of water for one person is 160 l/d. Cleaned water from biological treatment plants can discharge into surfaces water. Domestic sewage treatment plants are secure biological wastewater depuration according BOD7 average annual 29 mg/l, and maximum instantaneous 40 mg/l. ANVI type of cleaning plant made three technological parts (1 picture), it is in one capacity and in the plant.
The waste-water flows into primary sedimentation tanks part, where it comes to partial separation of coarse impurities. So treated waste-water flow from the sedimentation space into the aeration chamber. There the waste-water is treated by means of microorganisms partly formed on biofilm reactor and partly in activated sludge (aeration chamber). Activated sludge and part of the waste-water flows in to the final sedimentation space. Part of superfluous activated sludge returns back in to the aeration chamber and cleaned water could flow to surface water.
STRICTLY IS PROHIBITED leave and spend to closet, sink: condom, sanitary packages, cigarettes butt, plastic, paper, other material which no melt in water, recrements of food, coffee-grounds, excrement of animals, to pour olive, fat, chemicals materials ( paint, varnish, acid of accumulator, other acid, various thinners, fats, used fats, inappropriates to use medicine, pesticides, leach of kalium permanganate, strong chlorine leaches, alkali and so forth); waste; also, can not let to daily wastewater treatment plant water of reservoir, sewerage of rain, water from water development and clearing plants.