Resource utilization method of sludge biogas residue

The invention discloses a resource utilization method of sludge biogas residue. The resource utilization method comprises the steps that a flocculating agent is added to raw sludge from a sewage plantfor dehydration to obtain dehydrated sludge; the obtained dehydrated sludge is subjected to anaerobic digestion treatment to obtain digested sludge and generate biogas; the obtained digested sludge is dried, and obtained solid sludge biogas residue is subjected to low-temperature pyrolysis to obtain pyrolytic carbon; and the sludge biogas residue pyrolytic carbon is added to the dehydrated sludgefor anaerobic digestion treatment. According to the resource utilization method of the sludge biogas residue, the dehydrated sludge is subjected to anaerobic digestion treatment, so that centralizedtreatment of municipal sludge is facilitated, reduction of the sludge is realized, problems of existing anaerobic digestion sludge treatment are solved, and a new method is created; and by optimizingan anaerobic digestion treat