0566 - New Petro-Chemical Base. From the time construction was begun on the...Front

New Petro-Chemical Base. From the time construction was begun on the Peking General Petro-Chemical Works, a waste-water treatment plan was set up. Photo shows a corner of the aeration tanks. The discharged water contains oil, sulfur, phenol, alkali--- and other harmful substances. With treatment it is purified contains nitrogen and can be used to irrigated farmland and raise fish and ducks.