The invention provides a
sludge total reduction and resourceful treatment process based on an
ultrasonic technology. The method comprises the following steps:
wastewater enters a secondary
sedimentation tank after biological treatment, part of
sludge flows back, and the rest of
sludge is concentrated; 30% of concentrated sludge is taken out from the gravity concentration tank, nano bubbles with the volume ratio of 10% are introduced, ultrasonic
cell dissolving treatment is conducted, the treated sludge flows back to the biological treatment device, and in-situ reduction is achieved; carrying out ultrasonic pretreatment and low-frequency pulse micro-current disintegration treatment on the residual 70% of concentrated sludge, enabling the treated sludge to enter an aerated grit chamber, discharging clean sand, and carrying out
advection precipitation on the sludge to generate carbon-rich sludge; mgO2 is added into the supernate to form
struvite crystals, the
struvite crystals are recycled, and the carbon-rich supernate and the carbon-rich sludge are combined to serve as endogenous carbon. According to the method, in-situ reduction of the sludge is efficiently realized; comprehensive
resource utilization is realized,
nitrogen and
phosphorus are recycled to generate
struvite, and meanwhile, carbon-rich supernate and carbon-rich sludge are combined to serve as endogenous carbon.