Method for harmless treatment and resource utilization of domestic sewage and sludge

The invention discloses a method for harmless treatment and resource utilization of domestic sewage sludge. The method comprises the following steps: step 1, pretreatment of the domestic sewage sludge; step 2, bionic enzymolysis; step 3, gas-liquid and solid-liquid separation; step 4, releasing pressure; step 5, harmless treatment; step 6, adjusting the pH value; step 7, quantitative packaging; in the first step, the water content of the domestic sewage sludge is 70-80%; in the step 2, the addition ratio of the domestic sewage sludge to the catalyst to the sodium hydroxide in the reaction kettle is (15-20): 1: 1; the biomimetic enzymolysis and high-temperature and high-pressure treatment technology is adopted for treating domestic sewage sludge, the safe fertilizer rich in water-soluble organic matter and nitrogen and phosphorus elements is obtained, and heavy metal precipitates filtered out in the production process and separated gas are subjected to harmless treatment; and harmless treatment and efficient r