| 摘要 |
<p>A sewage treatment plant and associated method in which sewage is introduced through an inlet (16) of a tank (10) or other suitable container installed in the ground, to form a liquid consisting of partially-treated sewage and biomass for treatment in the tank (10), with a biological filter (42) located in the tank (10) above the liquid and having a plurality of inclined or at least substantially upright filter passages (43). At least one airlift tube (39, 40) extends from a lower location (41) within the sewage biomass to an upper location above the filter (42), whereby air introduced into the lower end (41) of the or each lift tube (39, 40) directs biomass material on to the upper part of the biological filter (42), to recycle and oxidise the biomass.</p> |
