| 摘要 |
PURPOSE:To validate both a residual oxidizing agent in deodorized waste liquid and an unavailable component in a flocculating agent and to economically treat waste water by firstly treating odorous gas generated in a waste water treating stage of a night soil treating equipment by an oxidizing agent soln. and treating the deodorized waste liquid produced at this time by the flocculating agent contg. ferric chloride in the waste water treating stage. CONSTITUTION:Waste water 1 is primarily stored in a waste water storage tank 2 and thereafter treated in a biologically treating stage 3. Then a flocculating agent 4 such as ferric chloride is added and this waste water is treated in a flocculating and separating process 5 and separated into flocculated sludge 6 and treated water 7. On the other hand, when odorous gas generated from the waste water storage tank 2 is firstly treated in a wet scrubber 10 added with an oxidizing agent 9 such as sodium hypochlorite, waste water 11 contg. the oxidizing agent is obtained. Then this waste water 11 is added behind the biologically treating stage 3. Thereafter the flocculating agent 4 is added and both the oxidizing agent in the deodorized waste liquid and iron salt in the flocculating agent are effectively utilized. |
