NOVELTY - An organic slurry containing a mixture of solids suspended in a liquid, colloidal solids and dissolved pollutants is treated by flocculating a slurry stream with anionic polymer and/or a coagulant to aggregate suspended and colloidal solids into a floe, to form a flocculated stream; removing floes from the flocculated stream to form a deflocced stream; and feeding the deflocced stream into a high biomass concentration suspended growth system.    USE - For treating an organic slurry, e.g. animal manure slurry or wastewater.    ADVANTAGE - The inventive process maximizes treatment capacity and recovery of organic matter and nutrients for use as organo-mineral fertilizer. It can eliminate the need for anaerobic digestion, waste lagoons and/or land application when treating animal manure slurries.    DETAILED DESCRIPTION - Treatment of an organic slurry containing a mixture of solids suspended in a liquid, colloidal solids and dissolved pollutants e.g., nitrogen, phosphorus and organic matter, includes flocculating a slurry stream with anionic polymer or a coagulant, or both, to aggregate suspended and colloidal solids into a floe, to form a flocculated stream; removing floes from the flocculated stream to form a deflocced stream; and feeding the deflocced stream into a high biomass concentration suspended growth system to remove biologically a portion of the organic and inorganic nitrogen, and remove by biological luxury uptake a portion of the phosphorus. The system comprises a multi-stage sequence of an anaerobic zone, an anoxic zone, and an aerobic zone; and microfiltration membranes to filter liquid out of the aerobic zone to form a low-turbidity permeate. Each zone is separated with baffles, operating in a biomass recycle pattern from the anoxic zone to the anaerobic zone, and from the aerobic zone to the anoxic zone, with biomass wastage from the aerobic zone.    DESCRIPTION OF DRAWING(S) - The figure shows a process flow diagram corresponding to a pig manure slurry treatment train.