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.