Abstract |
An experimental program was conducted to determine equipment configurations for efficient solids removal, identification of critical parameters involved in the efficiency of electroosmotic pumping, and the design and testing of two prototype electroosmotic pumps. It was determined that electroosmosis can be applied to dewatering waste sludges of various types. For efficient dewatering from very wet sludge (2%) to burnable solids, it is necessary to orient the pumping apparatus with a cathode screen beneath the anode so that an initial sludge film can be formed by gravity settling at the cathode surface. Sludge cannot be thickened to a solids level exceeding 20% if the cake is beneath the liquid level of the sludge suspension and for drying beyond the 20% value, the cake must be brought out of the liquid. (WRSIC abstract) |