| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of treating sewerage without draining untreated drain in the sewerage to a public water area. SOLUTION: In this method of purifying the sewerage, chemicals are added into an inverted siphon part in a pipe culvert of the sewerage for treatment when the inflow quantity of sewage is small. COPYRIGHT: (C)2004,JPO&NCIPI
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