Circular grit chamber

The FSM grit wash unit has been developed with three aims in mind: To achieve a very high separation performance of finest grit particles To achieve the limit value called for in the document TA Siedlungsabfall (residential waste) for depositing on a Class 1 dumping site with upstream coarse screen. Grit wash unit in dry and wet charged versions. The FSM grit wash unit consists of two basic items – grit wash tank and discharge screw. Depending upon the effectiveness of the inlet screening unit, the screening drum can be dispensed with. During development, special emphasis was placed on low water consumption at low admission pressure in the service water. The grit wash unit provides high performance coupled with low operating costs. Functional principle: The grit/water mixture is fed in via the inlet flange of the grit wash tank. Organic matter is held in suspension and floated off while the grit is sedimented in the tank. With the addition of water, the sedimented grit is separated from the remaining organic constituents using a stirring device and up-current technique. The grit is removed from the tank, de-watered and discharged via a discharge screw.