Fenton-混凝沉淀-水解酸化-A/O工艺处理医药废水

Treatment of Pharmaceutical Wastewater Using Combined Fenton,Coagulating Sedimentation,Hydrolysis Acidification,and A/O Process

针对浙江某医药厂高浓度难降解医药废水的特点,设计将高浓度废水先经芬顿(Fenton)氧化处理后与低浓度废水混合,再采用混凝沉淀、水解酸化、缺氧/好氧(A/O)工艺进行后续处理,处理水量为120 m^3/d。工程实践结果表明,Fenton氧化处理有效提高了废水的可生化性,该组合工艺能够稳定高效地处理医药废水,实现了良好的脱氮除磷效果,出水水质达到《污水综合排放标准》(GB 8978—1996)的三级排放标准,且其中氨氮、总磷达到《污水排入城镇下水道水质标准》(GB/T 31962—2015)的B级标准。

According to the characteristics of high-concentration refractory pharmaceutical wastewater from a pharmaceutical factory in Zhejiang Province, the highly concentrated wastewater is firstly oxidized by Fenton and mixed with dilute wastewater, followed by coagulating sedimentation, hydrolysis acidification, and anoxic/oxic （A/O） process in this design. The treatment capacity is 120 m3/ d. It is showed that Fenton oxidation effectively improved the biodegradability of wastewater. The com- bined process could treat pharmaceutical wastewater effectively and stably with good removal effect of nitrogen and phosphorus. The final effluent quality could meet the third level of Integrated Wastewater Discharge Standard （GB 8978 - 1996）. Among them, the effluent ammonia nitrogen and total phosphorus could meet B level of Wastewater Quality Standards for Discharge to Municipal Sewers （GB/T 31962 - 2015）.