难降解制药废水渗坑治理的工艺设计及运行效果

Process Design and Operation Effect for Treatment of a Pharmaceutical Wastewater Seepage Pit

针对天津某制药厂渗坑的废水成分复杂、有毒有害、可生化性差等特点,通过曝气充氧+微生物强化+膜化学反应器(MCR)+连续活性炭吸附再生+景观浮床+投放水生动物等组合措施,对渗坑进行了综合治理和生态修复。运行结果表明,采用微生物强化技术,对苯胺、甲苯、硝基苯和挥发酚的降解率分别达到98.3%、93.2%、98.1%和95.3%。该组合措施可有效去除废水中的有机物、氨氮、总磷等污染物,增加河道中的生物多样性,强化水体的自净能力。渗坑废水处理后水质达到《地表水环境质量标准》(GB 3838—2002)中Ⅴ类标准。

The wastewater from seepage pits in a plicated composition, toxic and hazardous compounds, pharmaceutical factory is characterized by com- low biodegradability and so on. The combined process including aeration, enhanced microbial technology, membrane chemical reactor, continuous acti- vated carbon adsorption and regeneration, landscape floating island, launching aquatic animals was used for the comprehensive treatment and ecological restoration of the pharmaceutical wastewater in pits. It was showed that the bioaugmentation degradation rates of aniline, toluene, nitrobenzene and volatile phenol were 98.3%, 93.2%, 98.1% and 95.3% , respectively. The combined measures could effectively re- move the organic pollutants, ammonia nitrogen, total phosphorus and other pollutants in the wastewater, increase the biological diversity in the river channel, and strengthen the self-purification ability of the wa- ter body. After treatment, water quality could stably meet level V criteria in Environmental Quality Standards for Surface Water（ GB 3838 - 2002）.