| 摘要 |
<p>A small-scale waste water treatment plant has an enclosed filtering basin (10) with an overflow outlet (44) pipe (80) discharging to a sump (60) inlet (82) esp. at the base of a biological treatment vessel (12). Water circulation within the biological treatment vessel is maintained by a pump (62) located within a partitioned (78) section at the base. The partition has a large number of small diameter holes.</p> |
