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A municipal sewage treatment plant, the scope of service includes the main urban area, development zone, township, etc. The total design scale is 40000 tons/day. The process of "A/A/O micro aeration oxidation ditch + active sand filter + sodium hypochlorite disinfection" is adopted. The tail water is discharged through the tail water discharge pipe. After the discharge transformation in 2019, the tail water discharge reaches the quasi class IV discharge standard.