Patent ID: 7485230

Claim:
An integrated wastes, and polar fats/oils/greases/waxes (FOG) waste treatment method, the steps comprising: a) circulating actively digesting sludge in a slipstream loop at a rate for precluding solid settlement accumulation as a flowable slurry from a base and back to a head of an anaerobic wastewater digester system; b) warming the circulating actively digesting sludge to a temperature at least sufficient to soften polar FOG for a desired sewage treatment temperature range; c) initially pumping a set volume (V 1 ) of the warmed, circulating, actively digesting sludge from the slipstream loop though a rock trap and a delivery/input line piping into, for partially filling a closed, vented receiving/conditioning, holding tank; d) connecting a hauler tank containing a volume (V H ) of FOG wastes via an offloading hose to the rock trap; e) pumping the entire FOG waste volume (V H ) from the hauler tank though the rock trap and the delivery/input piping into the closed, vented, receiving/conditioning, holding tank; f) pumping a second volume (V 2 ) of the warmed circulating actively digesting sludge from the slipstream loop via the rock trap and delivery/input piping into the closed, vented, receiving/conditioning holding tank where (V 1 ):(V H ):(V 2 ) have a pre-selected relationship and (V 1 )+(V H )+(V 2 ) is less than the volume of the receiving/conditioning holding tank; g) mixing the warmed, circulating actively digesting sludge with the FOG wastes in the receiving/conditioning holding tank for liquefying, hydrolyzing and decreasing solids particle size of the FOG wastes and allowing acidogens in the actively digesting sludge to pre-digest such wastes, producing volatile fatty acids, some biogas, and from the FOG wastes and actively digesting sludge, a highly bioreactive, flowable, feedstock slurry; h) injecting at a metered rate the highly bioreactive, flowable, feedstock slurry from the receiving/conditioning holding tank back into slipstream loop circulating the warmed, actively digesting sludge slurry; and i) introducing the highly bioreactive, flowable, feedstock slurry with the actively digesting sludge slurry in the slipstream loop together with raw digestible wastes at the head of the anaerobic digester system for solids digestion and steady-state methane production.