Stabilization can be aided by the technique of blending sludge. Blending is a process where two or more types of sludge are "blended" together to facilitate a higher sludge solids concentration and a more homogenous mixture of sludge prior to dewatering. Blending operations tends to decrease the chemical demand for conditioning and dewatering sludge. The blending operation usually takes place in sludge holding tanks normally where primary sludge is mixed with waste activated sludge. The amounts of the sludge to be blended can only be found by experimentation, with the final results being seen at the dewatering operations.
Was this article helpful?