【摘要】 用国产中空纤维膜组件,研究膜混凝反应器小试规模条件下的除砷效果.结果表明:膜混凝反应器的除砷效果良好,砷的去除率高达92.8%~98.2%,可使原水中As(Ⅴ)的浓度从100μg/L左右降至10μg/L以下,出水平均含砷4.40μg/L,完全满足城市供水水质标准的要求;膜污染是导致膜比通量下降的主要原因,铁盐对膜污染的贡献较小,膜污染主要是有机物污染,占总量的67.2%;通过物理清洗和化学清洗可使膜比通量恢复到新膜的87.8%.更多还原

【Abstract】 A lab-scale membrane coagulation reactor with hollowfiber microfiltration membrane is used to remove arsenic(Ⅴ) from drinking water.The results show that arsenic removal efficiency ranges from 92.8% to 98.2%.When the concentration of arsenic in raw water is about 100 μg/L,the concentration of arsenic in the treated water is below 10 μg/L and the averaged value is 4.40 μg/L.The quality of treated water satisfies Water Quality Standards For Urban Water Supply.The decease of membrane specific flux is mainly due to membrane fouling.The influence of ferric to membrane fouling is minor and membrane fouling is mainly caused by organic matters in the raw water which contributes to 67.2% of the total membrane resistance.After physical and chemical cleaning,the membrane specific flux can recover to 87.8% of the initial value.更多还原