| 摘要 |
This application describes method and apparatus for creating a flow of aqueous waste periodically which will eliminate from sewers and manholes any settled solids accumulated therein, which consists of a sewage accumulation tank positioned in a manhole and communicating with the liquid sump thereof at a level below that of the outlet sewer conduit. The tank is adapted with vacuum means to induce flow of sewage into the accumulation tank and means for introducing air into the tank to eliminate the vacuum and to release the accumulated sewage rapidly to join with the normal sewage flow to produce a flushing surge of liquid flowing in the sewer conduit.
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