METHOD AND DEVICE FOR TREATING ORGANIC COMPOUND OF CHLORINE

摘要

PURPOSE:To provide a method and a device for decomposition and treatment of an organic chlorine compound in waste water wherein treating performance for the organic chlorine compound by means of bacteria can be maintained for a long period of time so that stable quality of treated water can be obtained. CONSTITUTION:In a device for decomposition and treatment of an organic chlorine compound in waste water which includes a plurality of reactors l filled with bacteria and a means for introducing into the reactors 1 waste water 6 containing the organic chlorine compound, and methane and oxygen or air 8, there are provided a means 12 for changing over feed 6 of waste water to the plurality of reactors 1 any time or periodically and a means 8 for changing over an introducing concentration ratio of methane with respect to oxygen in association with changeover. And an operation wherein the waste water is supplied under conditions that the concentration of dissolved oxygen in the liquid phase in the reactor is 1.7 (mole fraction) times or more the concentration of dissolved methane and an operation wherein feed of waste water is stopped when the concentration of dissolved oxygen in the liquid phase in the reactor is 1.1 times or less the concentration of dissolved methane to restore activity are performed alternately.