| 摘要 |
The invention relates to an apparatus for the treatment of waste sludge. The apparatus comprises as its main feature a vertically extending housing unit having a height/width ratio sufficient to provide separate zones in the housing unit, including a settling zone for thickened sludge, a mid-level buffer zone for waste sludge containing solid matter in suspension and a supernatant treatment zone for supernatant treatment. The housing unit also has an inclined bottom with a slope sufficient to cause a lateral and a gravity force to be exerted by the solid matter in the sludge along the inclined bottom to yield a thickened sludge at the settling zone of the housing unit and a supernatant liquid having a reduced solid content at the supernatant treatment zone of the housing unit. The height/width ratio of the housing unit is important to provide the three zones referred to above by which treatment of the supernatant can be conducted in the supernatant treatment zone with minimal disturbance to the settling zone. The sloped bottom provides a geometry which improves sludge accumulation and evacuation, with minimal dilution.
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