| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a night soil treating system which suppresses the generation of malodor and eutrophication due to treated water, is suitable for efficiently treating a large quantity of night soil or septic tank sludge or the mixture thereof, is little in the amount of sludge generation and is economical. SOLUTION: This night soil treating system is composed of a pretreatment process in which the water quality of waste water after treating night soil or septic tank sludge or the mixture thereof satisfies the charging standard into sewrage and a main process in which the water quality of the waste water after additionally treating the said waste water satisfies the sewrage treated water effluent standard. In this two step night soil treating system, a specified soil bacteria group is used for the pretreatment process in particular.</p> |
