P2@HFO纳米复合材料深度除磷工艺中试研究.docVIP

  P2@HFO 纳米复合材料深度除磷工艺中试 研究# 肖莉莉，谢英梅，潘丙才，吕路** 5 10 15 20 （污染控制与资源化研究国家重点实验室，南京大学环境学院，南京 210046） 摘要：摘要：作为水体富营养化的关键影响因子，磷在水与废水中的控制标准不断提升。开 发经济适用的深度除磷技术已成为水污染控制领域的重要研究课题。本研究以聚苯乙烯基纳 米 Fe(III)氧化物 P2@HFO 为吸附剂，对 P2@HFO 固定床吸附深度处理城市污水处理厂生化 尾水进行了除磷中试研究。结果表明：该材料对城市污水 MBR 工艺处理出水具有较好的深 度除磷效果，当进水磷浓度在 1-1.5 mg/L、流速为 60 BV/h 时，以一级 A 排放标准 0.5 mg P/L 为泄漏点，每批次处理量可达 4000 BV，使用 5% NaOH+5% NaCl 即可实现 P2@HFO 的再 生。 关键词：磷；深度处理；纳米复合材料；水合氧化铁 中图分类号：X52 Pilot study on deep phosphate removal by P2@HFO nanocomposite XIAO Lili, XIE Yingmei, PAN Bingcai, LV Lu (State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046) Abstract: As the key factor of water eutrophication, the control criteria of phosphorous in water and wastewater are becoming more rigorous. Thus, it is still an important and challenging task to exploit an economical and applicable technology for deep phosphorous removal from water. In 25 30 35 40 this article, we proposed a new process of pilot scale, i.e., fixed-bed adsorption based on hydrated ferric oxide-immobilized nanocomposite P2@HFO, for deep removal of phosphorous from waste effluent discharged from municipal wastewater treatment plant. The results indicated that phosphorous in waste effluent can be effectively removed from 1-1.5 mg/L to 0.5 mg/L by P2@HFO when the flow rate was set as 60 BV per hour, with the treatment volume of 4000 BV per run. Moreover, the exhausted P2@HFO could be regenerated by a binary solution of 5% NaOH and 5% NaCl for repeated use without any significant capacity loss. Key words: Phosphorous; Deep removal; Nano-composite adsorbent; Hydrated ferric oxide 0 引言 含磷生活污水和工业废水排入江河湖泊中，会增加水体营养物质的负荷，从而导水体富 营养化[1]。我国许多湖泊和水库都面临着不同程度的富营养化威胁，如滇池、太湖等都已经 处于重富营养化状态[2]。由于湖泊水体富营养化越来越严重，磷的排放标准也越来越严格。 在 1996 年、2002 年、2008 年，中国环保部门分别对生活污水和各种工业废水中磷的排放标 准进行了提高，而美国 Lake Tahoe（太浩湖）、Great Lakes（北美五大湖）、The Occoquan Reservoir and the Chesapeake Bay、Northern Gulf of Mexico 四个区域已经将排放标准分别提 高到 0.1-0.2 ppm