膜科学与技术

投加FeCl3改善PAC四级逆流吸附-微滤工艺的膜污染研究

作者：于金山¹，李竞²，郭军科¹，王丹²，张光辉²，顾平²

单位： 1.国网天津市电力公司电力科学研究院天津 300384；2.天津大学环境科学与工程学院，天津300072

关键词：粉末活性炭；二级出水；四级逆流吸附；膜清洗；膜污染

出版年,卷(期):页码： 2016,36(6):108-112

摘要：

粉末活性炭(PAC)四级逆流吸附-微滤组合工艺处理城镇污水厂二级出水的试验存在着较严重的膜污染现象，处理水量达到172.8 L时，膜比通量(SF)急剧下降79.59%。对试验结束后的膜进行分析，滤饼层阻力占总膜阻力的70.3%， PAC及原水中悬浮物形成的滤饼层污染是SF迅速下降的主要原因。为了解决膜堵塞问题，向反应器中投加一定浓度的FeCl3。结果表明：加入10~20 mg/LFeCl3后，处理水量大于300 L，SF仍维持在20 L/(m2•h•mH2O)以上， SF下降缓慢，反应器能够稳定运行。另外，FeCl3的投加对有机物的去除有积极作用，组合工艺中出水DOC浓度均有小幅度的降低。

The experiment on hybrid process of PAC four-stage countercurrent adsorption and microfiltration for treating municipal secondary effluent existed serious membrane fouling phenomenon. When the secondary effluent with a volume of 172.8 L was treated, membrane specific flux (SF) fell by 79.59%. The membrane was analyzed after the experiment, filter cake layer resistance was 70.3% of the total membrane resistance. The filter cake layer formed by PAC and suspended solids in the secondary effluent was the main cause of SF declining rapidly. In order to solve the membrane fouling problem, a certain concentration of FeCl3 was dosed into the reactor. The experiment results indicated that when dosing 10-20 mg/L of FeCl3 and treating more than 300 L of water, SF maintained at more than 20 L/ (m2•h•mH2O), SF decreased slowly, the reactor could be operated steadily. In addition, it has positive effect on the removal of organics when dosing FeCl3, concentration of DOC in the effluent reduced slightly.

第一作者简介：于金山（1979-），男，吉林省松原市人，工程师，从事环境与水处理研究，E-mail：pinfan10@126.com. *通讯作者：E-mail：pinfan10@126.com.

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