WATER TREATMENT APPARATUS Russian patent published in 2015 - IPC C02F9/04 C02F1/52 B01D21/02 B01J8/00 B01J19/32 B03D3/02 

FIELD: chemistry.

SUBSTANCE: water treatment apparatus consists of a vessel 1 with a mixer 7 for mixing water with a coagulant, a vessel 2 with a mixer for adding microsand and a flocculant to the mixture, a vessel with a mixer 3 for mixing and holding the mixture and a settling tank 4 with thin-layer modules, equipped with overflow channels, a pipe for pumping out the obtained sludge, as well as devices for separating microsand from the sludge. The device for separating microsand from the sludge is a wash column 5 equipped with perforated trays with a 30-60% flow cross-section. The wash column 5 is connected to a pulsation system 18 and is provided with a pipe for pumping out the obtained sludge, which is connected to the upper part of the column, and a pipe which connects the lower part of the column with feeders for feeding microsand into the mixture.

EFFECT: invention provides more efficient sludge processing for separating microsand and returning the microsand into the process.

5 cl, 1 dwg, 1 tbl