According to the requirements of"Tianjin Water Pollution Prevention and Control Work Plan,"the efflu-ent quality of urban sewage treatment plants meets the Class A standard of"Discharge Standard of Pollutants for Urban Sewage Treatment Plants"(DB 12/599-2015).In the upgrading and reconstruction project of an industrial park sewage treatment plant in Tianjin,the denitrification filter was used for advanced treatment,and the total design scale was 5×104 m3/d.The operation results showed that the denitrification filter had no obvious removal effect on COD due to the high re-fractory organic matter in the influent of the plant.The system has obvious removal of total nitrogen and ammonia nitrogen,and the emission index can reach the DB 12/599-2015 emission standard.
维普
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