工业废水与生活污水合并处理工程的改造与应用

介绍了江苏省某污水处理厂的工艺改造情况。在保持处理水量不变的情况下，将原设计仅处理生活污水的工艺改为工业废水与生活污水合并处理，其中工业废水量约占60%。改造内容包括增加气浮隔油-水解酸化的预处理，将原A/O工艺改为A²/O工艺，同时将无阀滤池扩建为高密度沉淀池-无阀滤池进行深度处理。结果表明，由于强化了预处理和深度处理，改造后的工艺适合处理混合型城市污水，对COD、BOD₅、NH₃-N、TN、TP的去除率分别达到92.4%、94.9%、91.1%、80.8%、95.8%，出水水质均能达到排放要求。

The technological modification of a wastewater treatment plant in Jiangsu Province was introduced. The original process designed to treat domestic wastewater only was modified to treat both industrial and domestic wastewater with the same treatment capacity, of which 60% was industrial wastewater. The modification measures included adding the pretreatment of air floatation, oil separation and hydrolysis acidification, changing the original A/O process to A²/O process, and expanding the valveless filter to include a Densadeg for advanced treatment. The results indicated that the modified process was suitable to treat mixed municipal wastewater due to the enhanced pretreatment and advanced treatment. The removal rates of COD, BOD₅, NH₃-N, TN, and TP reach 92.4%, 94.9%, 91.1%, 80.8% and 95.8%, respectively, and the effluent quality could meet the discharge requirements.