某化工园区废水处理工程设计实例

采用“分质调节—混凝沉淀—厌氧水解—缺氧生物处理—好氧生物处理”工艺处理某化工园区以氟化工和精细化工废水为主的工业废水。工程运行结果表明：废水经处理后，COD=35 mg/L，TN=5.2 mg/L，ρ（NH₃-N）=3.1 mg/L，TP=0.15 mg/L；COD，TN，NH₃-N，TP的去除率分别为91.1％，67.1％，70.5％，89.3％；出水达到DB 32/T1072—2007《太湖地区城镇污水处理厂及重点工业行业主要水污染物排放限值》中的排放标准。工程设计规模1.0×10⁴ m³/d，工程总投资约5 000 万元，直接运行费用1.50 元/m³。每年减少COD，TN，NH₃-N，TP的排放量分别约为1 324.6，38.69，11.05，4.56 t。该工程的实施明显改善了区域水环境，为太湖流域污染的治理提供了技术支撑。

Project Design Example for Chemical Industry Park Wastewater Treatment

The industrial wastewater in a chemical industry park,mainly generated in fluorine chemical and fine chemical processes,was treated by the process of separate adjustment- coagulative precipitation-anaerobic hydrolysis-anoxic biotreatment-aerobic biotreatment. The running results show that：The COD,TN,ρ(NH₃-N) ,TP of the effluent are 35,5.2,3.1,0.15 mg/L with 91.1%,67.1%,70.5%,89.3% of removal rates respectively；The effluent quality can meet the Taihu lake region discharge standards of DB 32/1072-2007. The designed capacity of the project is 1.0×10⁴ m³/d,the investment is about 50 million yuan,and the direct operation cost is 1.50 yuan/m³. The annual discharge amounts of COD,TN,NH₃-N,TP are decreased by 1 324.6,38.69,11.05,4.56 t respectively. The project has significantly improved the regional water environment and provided a technical support to the pollution control of Taihu lake basin.