METHOD OF PURIFYING WASTEWATER FROM CAR WASH Russian patent published in 2012 - IPC C02F1/24 C02F1/52 C02F1/40 C02F103/44 

FIELD: chemistry.

SUBSTANCE: two-stage flotation is performed. First initial stage of pressure flotation, during which water is dissolved in purified water, is combined with filtration stage until small bubbles of air start releasing. The following second stage of flotation is carried out with switching off installation and to the moment until small air bubbles start to release. Foam layer, formed on filter surface is removed from installation. Invention ensures simplification of purification process and reduction of installation volume, increase of method efficiency in particular acceleration of purification and increase of ecological safety of purification process.

EFFECT: purified water satisfies imposed on it hygienic requirements of Sanitary rules and requirements.