Method for the treatment of animal waste from an animal containment building, comprising: a) periodically removing undiluted animal waste from the animal containment building； b) placing the removed waste in a hydrolytic degritting chamber with heated water or steam to obtain a mixture having a temperature of at least about 50 degrees C to about 60 degrees C, and degritting the mixture；c) transfer of at least a portion of the degritted mixture into an anaerobic digester chamber held at a temperature of about 50 degrees C to about 60 degrees C, and digesting the mixture； and d) transfer of at least a portion of the digested mixture to a secondary solid-phase digester chamber loaded with dry biomass and fermenting the mixture at a temperature of at least about 50 degrees C, to obtain bio-organic fertilizer and biogas.A system for the treatment of animal waste from one or more animal containment building, comprising: a) one or more animal containment buildings containing animal waste； b) a hydrolytic degritting chamber in fluid communication with an anaerobic digester chamber, which is in turn in fluid communication with a secondary solid-phase digester chamber, all in an insulated unitary structure wherein communication is accomplished by flow pressure； and c) heated water or steam to combine with animal waste from the one or more containment buildings to raise the combined temperature to about 50 degrees C to about 60 degrees C； wherein in use the animal waste from the animal containment building is in fluid communication with the hydrolytic degritter.The method and system for disposing of waste for the hog industry avoids use of lagoons.
