A HUBER Reception Bunker serves for raw waste storage. A conveyor screw is integrated in the bunker and serves for controlled waste feeding.
In our Wash Drum the fed waste is submerged and homogenized. Coarse solids (> 10 mm) are screened out and washed, while fine solids (< 10 mm) are suspended in the wash water and drained through the drum. Washed coarse solids are discharged at the drum’s end and dewatered and compressed in our Coarse Solids Compactor.
The drained suspension is pumped to a HUBER COANDA Grit Washer. In its fluidized bed mineral solids are separated due to their high specific weight. The mineral fraction is intensively washed and then dewatered (volatiles < 3 % and water < 10 %). Coarse grit can be screened out and recycled as road grit.
Organic solids (> 1 mm) are removed from the remaining suspension with a HUBER wege wire Rotary Drum Fine Screen. They are simultaneously dewatered and compacted (> 30 %DS).
The screened water is re-circulated as wash water to our Wash Drum. Surplus can be treated in a HUBER Longitudinal Grit Trap for removal of very fine sand (< 0.2 mm) and, after flocculation, in a sedimentation tank and a HUBER Dissolved Air Flotation Plant (DAF) for removal of colloids. The DAF’s effluent is recycled as process water to the Grit Washer and Wedge Wire Screen. Removed sludge is dewatered in our Screw Press; solids contents of over 50 %DS can be achieved.
If the system is located at a sewage treatment plant, the organic suspension is generally discharged into its headworks and the plant’s effluent is reused as process water. Special process water treatment is then not needed.
When we implement our solutions, we also provide other top-quality stainless steel components, such as Screw Conveyors and Manhole Covers.