Treatment method of oil-containing wastewater, oil-containing wastewater processing equipment and additives

摘要

PROBLEM TO BE SOLVED: To provide a method and an apparatus for treating oil-containing wastewater for effectively separating an oil content to a drainable level without adjusting a pH of the oil-containing wastewater or requiring complicated temperature control.;SOLUTION: There are provided the method for treating the oil-containing wastewater comprising a pretreatment step for pretreating the oil-containing wastewater with an oil and fat decomposition enzyme and/or an activated carbon under a condition of applying ultrasonic vibration as needed; optionally, a lubricant removal treatment step for treating the oil-containing wastewater subjected to the pretreatment with an oil coagulating agent to coagulate at least a part of the lubricant in the oil-containing wastewater for removal; and an activated carbon treatment step for treating the oil-containing wastewater treated with the activated carbon; and the apparatus for treating oil-containing wastewater in combination with treatment tanks for performing these treatments.;COPYRIGHT: (C)2007,JPO&INPIT