Method and system for improving methane production performance and dehydration performance of sludge

The invention belongs to the field of solid waste treatment, and particularly relates to a method and a system for improving methane production performance and dehydration performance of sludge, the method comprises the following steps: uniformly mixing air nano bubble water and dehydrated waste sludge inoculated with inoculated sludge in an anaerobic reactor, and carrying out anaerobic digestion for 35-45 days at medium temperature, after the air nano bubble water is injected into the sludge, additional dissolved oxygen can be provided on the premise of not damaging the anaerobic environment of the sludge, the metabolic activity of facultative anaerobic microorganisms in the sludge is improved, and the degradation of organic matters is accelerated. In addition, the nano bubbles can also increase the specific surface area of the sludge, improve the contact efficiency of the sludge and microorganisms, and facilitate release of nutrient substances and decomposition of organic matters in the sludge, so that the