The discharged sludge from the anaerobic digesters is then held in sludge blending tanks. The belt filter press operation is a dewatering process that will reduce the volume of the sludge that will eventually be hauled from the plant and applied to farmers fields. In this operation anaerobically digested sludge from the storage tanks is pumped to the belt filter presses. Here the sludge is passed in between two porous belts. The water passes through the belts while the sludge is held between them.
Additional water is removed by applying pressure to the belts.
Because of our cold climate the biosolids cannot be be land applied during the winter months. It is for this reason that our storage facility can store up to six months of biosolids production.