Grit Removal System – so that your system does not silting up.
The sand contained in the waste is a central problem of any waste treatment and fermentation. It is the cause of enormous wear and blockages in fittings and pipes. In addition, it leads to sediments in all containers, especially the fermenters, which can no longer be stirred and can caked hard as concrete. The consequences are high maintenance and repair costs as well as a lack of operational safety and functionality.
Therefore, in the second step of the BTA® Hydromechanical Waste Treatment, the organic suspension produced in the waste pulper is freed from the still contained, sedimentable impurities. This includes sand, glass splinters, mussel and egg shells, stones or similar. Sand separation (grit separation) takes place in the BTA® Grit Removal System, which essentially consists of a storage tank, a hydrocyclone, a classifying tube and a grit box. Due to the centrifugal forces in the hydrocyclone, a sludge enriched with grit is discharged as underflow into the classifying tube and sediments downwards into the grit box, whereby the content of organic particles in the grit is reduced by upflow water. Depending on the parameterisation, the degree of separation is over 98 %. The separated impurities are discharged at intervals from the grit box into the downstream classifying screw, where they are largely cleaned of organic fines, dewatered and conveyed via a conveyor belt into a collection container.