Abstract: An apparatus for treating substantially liquid sludge having means for providing sludge of less than 10% solids content to a basin, means for providing an alkaline additive in sufficient quantity to the sludge in the basin to increase the ph of the sludge in the basin, a sludge/alkaline blender having a sludge arm conduit, an alkaline arm conduit, and an exit conduit, means for delivering alkaline additive to the alkaline arm conduit, means for delivering recirculated sludge/alkaline mixture drawn from the basin to the sludge arm conduit, means for delivering sludge/alkaline mixture containing newly added alkaline additive thoroughly intermingled with the recirculated sludge/alkaline mixture through the exit conduit of the blender, and means for mixing the sludge and alkaline mixture in the basin to ensure substantially all particles of the sludge alkaline mixture have a pH level of a minimum level.

Abstract: A process is provided for the alkaline stabilization of substantially liquid sludge which includes the steps of providing sludge of low solids content to a basin, and providing alkaline additive in sufficient quantity to the sludge in the basin to increase the ph of the sludge to a level above 12 by utilizing a sludge/alkaline blending Y. The blending Y has a sludge arm conduit, an alkaline arm conduit, and an exit conduit. Alkaline additive is provided to the alkaline arm conduit and recirculated sludge/alkaline mixture is drawn from the basin and is provided to the sludge arm conduit. A sludge/alkaline mixture containing newly added alkaline additive exits through the exit conduit of the Y. The recirculated sludge/alkaline and alkaline additive are mixed and thoroughly intermingled as they pass through the Y.