In waste water treatment, screw compactors and screening waste washer / compactors are used to transport and compact waste from bar screens.
The screw compactor consists of a coreless screw rotating in a U-shaped trough, lined with a durable material.
As there are no intermediate shafts or bearings, the risk of clogging is minimal when transporting moist, sticky or long fibrous materials. The trough is covered to eliminate dust and odour problems and also to reduce the risk of accidents.
At the end of the conveying area, the waste can be washed before entering the compacting cell. The spiral conveys the waste to 2/3 of the compacting zone. The lower part of the cell is perforated to allow the evacuation of the filtrates induced by the compaction. A hatch equipped with counterweight (or not) completes the compaction before the waste is evacuated.
The compactor can discharge the waste directly into containers or other modes of transport, and it can also be equipped with a rotating support so that it can be moved from one container to another. However, inclinations of more than 30° should be avoided.
Screening waste washer / compactor
The screenings from bar screens are conveyed to the washing area by the screw with core. In the washing area, the screenings are washed and the organic material is removed.
After washing, the screenings are discharged to the compacting area: the washing water is then discharged to a waiting flange and the washed and compacted waste are discharged to a tank.
The screw compactor washer produces a compact waste with less organic matter and a considerable reduction in transport costs.