METHOD AND APPARATUS FOR TREATING OIL-CONTAINING WASTE WATER

摘要

PROBLEM TO BE SOLVED: To efficiently remove an oil component in oil-containing waste water high in concn. up to a concn. possible to discharge. SOLUTION: The greater part of an oil component in oil-containing water high in concn. is removed in a pressure flotation treatment tank 11 to obtain treated water, which is, in turn, allowed to flow to a bioreactor 13 packed with a petroleum adsorbing. material not only to adsorb the oil component by the petroleum adsorbing material 33 but also to decompose the adsorbed oil by petroleum decomposing bacteria.