摘要：

某化学合成制药企业针对其产生的废水盐分含量高、生物毒性大、可生化性差等特点，并结合用户的再生水使用需求，将“UASB（上流式厌氧污泥床）?HBF（生物固定膜复合技术）?UF/NF/DM（超滤/纳滤/高频振动膜分离技术）”组合工艺应用于化学合成制药废水的零排放处理。本工程案例中，设计厌氧池COD容积负荷为4.5 kg/（m³·d），水力停留时间为47 h，好氧池COD容积负荷为1.0 kg/（m³·d），水力停留时间为30.7 h。运行结果表明，在设计工况下，该组合工艺对化学合成制药废水的处理效果稳定，且抗冲击负荷能力强。经该组合工艺处理后，系统回用水COD<80 mg/L、TN<20 mg/L、NH₃?N<15 mg/L、TDS<800 mg/L，COD和TN去除率分别可达99.2%和93.3%，出水水质满足《循环冷却水用再生水水质标准》（HG/T 3923—2007）的要求，且再生水回用率达98.3%。系统运行成本约为37~43元/m³。

关键词: 制药废水, 零排放, 上流式厌氧污泥床, 生物固定膜复合技术

Abstract:

Aiming at the characteristics of high salt content， high biological toxicity， and poor biodegradability of wastewater from a chemical synthetic pharmaceutical company，and combining the user’s reclaimed water use needs，the “UASB（up-flow anaerobic sludge bed）?HBF（hybrid biological & Fixed film technology）?UF/NF/DM（ultrafiltration/nanofiltration/high frequency vibrating membrane separation technology）” combined process was used in the zero-discharge treatment of chemical synthesis pharmaceutical wastewater. In this project case，the design COD volume load and hydraulic retention time of the anaerobic tank were 4.5 kg/（m³·d） and 47 h respectively，and those of the aerobic tank were 1.0 kg/（m³·d） and 30.7 h respectively. The results showed that under the design conditions，the treatment effect of combined process on chemical synthesis pharmaceutical wastewater was stable，the impact resistance was strong. After treatment by the combined process，the COD，TN，NH₃?N and TDS of the recycled water of the system were respectively less than 80，20，15 and 800 mg/L. The removal rate of COD and TN could reach 99.2% and 93.3%，respectively. The effluent met the requirements of the Water Quality Standard for Reclaimed Water for Circulating Cooling Water（HG/T 3923—2007），and the reclaimed water reuse rate could reach 98.3%. The operating cost of the system was about 37?43 RMB/m³.

Key words: pharmaceutical wastewater, zero emission, UASB, HBF

中图分类号: 

• X703.1