锦纶6生产废水处理工艺设计及工程实践

Engineering Practice and Process Design of Wastewater Treatment in Polyamide-6 Granula Production

天津某生产锦纶6切片的化工企业新建一座生产废水处理站工程（350,t/d），废水处理工艺采用初沉池-缺氧-好氧（AN/O）-二沉池流程，工程工艺设计依据《室外排水设计规范》，并对缺氧-好氧（AN/O）工艺参数的选取进行了详细阐述。工程建成后经过3个月的试运行，在进水ρ（CODCr）＝1,845～7,367,mg/L、ρ（NH3-N）＝37～84,mg/L时，经缺氧（HRT＝7.9,h）-好氧（HRT＝30.6,h）处理后出水，ρ（CODCr）≤500,mg/L、ρ（NH3-N）≤35,mg/L、CODCr 和NH3-N 去除率分别为87.54%、95.41%和42.22%、73.33%。工程试运行结果与设计基本一致，其工艺设计经验可供借鉴与推广。

A waste water processing project（350 tons/day）was constructed in a polyamide-6 granula producer in Tian-jin. Taking anoxic-aerobic（AN/O）process as the main process,the project’s engineering design was referenced to the Code for Design of Outdoor Drainage Engineering and process parameters of the AN/O process were elaborated. After a 3-month trial run,when ρ（CODCr）=1,845~7,367 mg/L and ρ（NH3-N）=37~84 mg/L for the influent,ρ（CODCr）≤500 mg/L and ρ（NH3-N）≤35 mg/L for the final effluent after treatment of Anoxic（HRT=7.9,h）-Aerobic（HRT=30.6 h）,the removal rate of CODCr reached 87.54% and 95.41% and the removal rate of NH3-N reached 42.22% and 73.33%. Results of the pilot run were basically consistent with the design,indicating that the experience could be referred and popularized by other similar wastewater treatment projects.