科研之友
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摘要
The reconstruction of township domestic sewage treatment stations in Jiangsu Province to receive industrial wastewater was introduced. The enterprises in the region were mainly small food processing factories and textile factories, and COD, TN and NH3-N in wastewater were high. The integrated ANO equipment+filter cloth filter process was adopted for six township domestic sewage treatment stations in the region. Their ability of impact load resistance was week and operation and maintenance was difficult, while the surplus treatment capacity of the original facilities was rich. Focusing on utilizing the surplus treatment capacity and enhancing the ability of nitrogen and phosphorus removal, the original integrated ANO equipment was reconstruction into inverted A2/O process, while MBBR tank, secondary sedimentation tank, high-efficiency sedimentation tank, blower room and dosing room were newly built. Through the reconstruction, the surplus treatment capacity of the original facilities was fully utilized for the industrial wastewater acceptance. Meanwhile, the treatment efficiency and stability of wastewater treatment stations were improved. Within six months of formal operation, the power consumption, reagent and labor cost of a single station was about 1.40 yuan/m3, and the effluent stably met the first-class A criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918—2002). ? 2022 Editorial Office of Industrial Water Treatment, CNOOC Tianjin Chemical Research and Design Institute Co., Ltd.
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