The Jones+Attwood Bache Classifier™ grit washer handles mixed solids from unscreened sewage. This is a highly effective tool for the separation of grit from foul and odorous organic solids, to produce consistently clean grit that is free of putrescible solids. Its stainless steel construction and few moving parts assure ease of maintenance for maximum design life and durability. Benefits include reducing waste volume for removal from site, reducing odour so that cleaned grit can be stored and reducing costs and space requirements for grit storage and disposal.
The grit, solids and water mixture is delivered to the grit washer from the primary separating system using heavy duty pumps. The Jones+Attwood solids pump system is recommended, and can be packaged with the classifying apparatus. Normal pumping duties are carried out via 100mm nominal bore pipes.
Because the Jones+Attwood Bache Classifier grit washer is designed to handle gross solids, the primary grit removal system can be located upstream of the screening equipment to prevent abrasive wear of screens, thus reducing maintenance and prolonging equipment life.
Water flows through the Jones+Attwood Bache Classifier grit washer, depositing solids and grits on the floor of the trough. These deposits are washed and then flushed into a dewatering screw conveyor; the dewatered grit is deposited for loading and removal.
The recommended flow rate is 15 litres per second is easily accommodated by the Jones+Attwood Bache Classifier grit easher. The maximum acceptable flow rate is 23 litres per second and flow rates in excess of this may be possible.