The invention discloses a method for realizing reduction of recessive growth of
sludge through reduction of microbial iron which is subjected to coupled oxidation by using Fenton. The method comprisesthe steps of: preforming a biochemical reaction of
activated sludge on
sewage, conducting static setting on the obtained
sludge-water mixed liquid in a secondary
settling tank, and performing refluxof part of the
sludge to a biochemical
reaction system, discharging the remaining sludge into a sludge concentration tank for concentration treatment, performing conditioning
dehydration on part of sludge in the concentration tank, performing external transporting treatment, and discharging a part of the dehydrated sludge into a microbial
iron reduction tank so as to realize
hydrolysis of the sludge and reduction of Fe<3+>; performing treatment on the sludge in the microbial
iron reduction tank, discharging the reduced sludge into a sludge
Fenton reaction tank, and starting a
Fenton reaction so as to perform breakage treatment on the sludge; and transferring the sludge
cell-broken liquid to a regulating tank so as to realize further reduction of endogenous consumption of the sludge, and returning the sludge
cell-broken liquid in the regulating tank to the biochemical reaction tank. Through the method, reduction of the sludge inside the
sewage treatment system and reinforcement of a biochemical
treatment effect of
wastewater are realized, the method has simple operation and low cost, and a feasible method is provided for efficient reduction of the remaining sludge and improvement ofthe biochemical
treatment effect of the
wastewater.