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Effect of PAC addition on MBR process for drinking water treatment

机译：PAC添加对MBR工艺处理饮用水的影响

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The continual pollution of the water supply in China has resulted in shortage of sufficiently clean drinking water,which is essential to this nation's quality of life in the 21 st century.In this paper,an innovative way of evaluating the removal of micro-pollutants from lake water was studied,using MBR and MBR-PAC(powdered activated carbon)hybrid processes.Chemical analyses showed that the quality of treated water has the potential to comply with the drinking water regulations of China.In this experiment,the accumulation of inert compounds in the bioreactor was measured,and the concentration of soluble organic pollutants in the mixed liquor was recorded.Based on this data,both A_m(organics accumulation factor in the mixed liquor)and S_m(membrane separation/rejection coefficient)were proposed to describe the removal of organic pollutants during the MBR process.Each has a close relationship with the removal efficiency of organic pollutants(eta).As such,the eta contribution by biological treatment(or combined with PAC adsorption)in the bioreactor was calculated through establishing a mass balance equation.The membrane fouling conditions were also investigated.The study resulted in the conclusion that the addition of PAC enhanced the microbial activity in the bioreactor,contributed to the increase of the eta and was also found to decrease the membrane fouling.
机译：中国供水的持续污染导致缺乏足够清洁的饮用水，这对于该国在21世纪的生活质量至关重要。本文采用了一种创新的方法来评估从中去除微量污染物利用MBR和MBR-PAC（粉状活性炭）混合工艺对湖水进行了研究。化学分析表明，处理后的水的水质有可能符合中国的饮用水法规。在本实验中，惰性化合物的积累测量生物反应器中的有机污染物，并记录混合液中的可溶性有机污染物的浓度。基于此数据，建议使用A_m（混合液中的有机累积因子）和S_m（膜分离/排斥系数）来描述MBR过程中有机污染物的去除。每个因素与有机污染物的去除效率（eta）都有着密切的关系。通过建立质量平衡方程计算生物反应器的处理（或结合PAC吸附），并研究了膜的结垢条件。 η的增加，还发现减少了膜的结垢。

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