SLUDGE AND KITCHEN COLLABORATIVE DIGESTION PROCESS COUPLED WITH INTERMEDIATE THERMAL HYDROLYSIS

The present invention belongs to the technical field of sludge treatment, and discloses a sludge and kitchen collaborative digestion process coupled with intermediate thermal hydrolysis. The collaborative digestion process comprises: 1) screening and slurrying kitchen waste, and desanding and deslagging a primary sludge; (2) mixing the kitchen waste and the primary sludge, and subjecting same to first-stage collaborative anaerobic digestion; (3) mixing the first-stage collaborative anaerobic digestion product with the residual activated sludge, and then subjecting same to centrifugal dehydration; 4) subjecting the dehydrated mud cake to thermal hydrolysis; 5) subjecting the thermal-hydrolyzed sludge to a desanding treatment; 6) diluting same followed by heat exchange; (7) second-stage anaerobic digestion; 8) plate-frame dehydration; 9) subjecting the filtrate to an anaerobic ammonia oxidation treatment; and 10) compounding mud cake nutrients to produce organic nutrient soil. In the present invention, the good