METHOD OF REMOVING PETROLEUM AND OIL PRODUCTS FROM WASTE WATER Russian patent published in 2011 - IPC C02F1/40 

FIELD: chemistry.

SUBSTANCE: method of removing petroleum and oil products from waste water involves fitting settling tanks or aerotanks - bioreactors of full biological treatment stations on the perimetre with semi-submersed wall-mounted partitioned trays, having receiving windows on the top edges of vertical walls. Floating petroleum and oil products from the trays are air-lifted into a remote unit fitted with removable cartridges. The filtered water is tapped to the inlet of biological treatment facilities. Inside the tray, along its longitudinal axis, there is a vertical partition which divides it into two sections of equal cross-sectional area. The bottom of the tray is formed by two planes lying at 90° to each other and in one of the planes which faces the wall of the settling tank or aerotank - bioreactor, there is an oval shaped opening for outlet of water which does not contain floating petroleum products. The tray is fitted with a baffle plate which is a structural continuation of one of the planes forming the bottom of the tray.

EFFECT: method increases stability of operation of biological treatment facilities due to virtually complete extraction of floating petroleum and oil products.

2 cl, 2 dwg