The invention discloses a low-energy
drying treatment method for discharged
sludge. The method comprises the following steps: after adding water into discharged
sludge in a first reaction tank so as to carry out physical degradation on the discharged
sludge and then uniformly stirring the obtained mixture completely, conveying the obtained discharged sludge with
water content of 80% to a second reaction tank; adding a chemical
reagent into the second reaction tank so as to carry out chemical conditioning and modification on the discharged sludge, then carrying out
mechanical filter pressing on the sludge so as to reduce the
water content of the sludge to 40-45%, and preparing the sludge into mud cakes; and ventilating and
drying the mud cakes in a
greenhouse shed so as to reduce the content content of the sludge to 20-30%. The method disclosed by the invention is suitable to be applied to the reclamation and
reduction treatment of discharged sludge of municipal
wastewater treatment plants, and the volume of the treated sludge is reduced by more than 70%, thereby effectively saving landfill
land resources; the sludge treatment method is simple in operation, low in cost and low in
energy consumption; by using the method disclosed by the invention, harmful substances in the sludge can be degraded completely, thereby avoiding the secondary
pollution to the environment; meanwhile, the mud cakes can be directly used as boiler fuel so as to recycle
heat energy.