| 摘要 |
<p>The present invention provides methods and apparatus that include piping system of headers (14) and laterals (16) providing flow to a central point so that sludge can be removed from areas where it accumulates most rapidly. The adaptable nature of the piping system additionally permits the number of collection laterals (16) and orifices therein to be varied to suit the sludge accumulation characteristics of the sludge basin (50). Multiple port valves (10) are disclosed that permit the selective connection of the headers (14) to an outlet.</p> |
