In one series, the pre-anoxic activated sludge process is adopted, that is, an anoxic stage (112 of the total volume of the biological treatment tank) is arranged in front of the push-flow aeration tank to improve the sludge properties and prevent sludge from swelling.
The other series adopts anoxic-aerobic (A/O) denitrification activated sludge process,
In the advanced treatment of reuse water, coagulation, inclined plate sedimentation, filtration and disinfection are added on the basis of secondary treatment to further improve the effluent quality.
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