粉末活性炭/超滤组合工艺处理微污染含藻水效果

Treatment of micro-polluted alga-rich water with PAC and ultrafiltration integrated process

采用粉末活性炭/超滤(PAC/UF)和单独UF处理微污染含藻水,分析2种工艺对水中污染物和微囊藻毒素(MC-LR)的去除效果以及PAC对膜污染控制效果。研究结果表明:2种工艺均能有效去除含藻水中的叶绿素a。反应器内亚硝化菌成熟时间为15 d左右,硝化菌的成熟时间为20 d左右,硝化菌成熟明显滞后于亚硝化菌。单独UF工艺对UV254和溶解性有机物(DOC)的平均去除率分别为11.5%和15.0%,PAC/UF工艺对UV254和DOC的平均去除率分别为32.7%和23.8%,PAC明显提高了超滤工艺对有机物去除效果,将MC-LR平均去除效果从18.5%提高至43.0%,同时,PAC有效减少了含藻水超滤过程膜污染。生物粉末活性炭与超滤联用成为一种经济、高效的MC-LR控制技术。

An integrated process of powdered activated carbon（PAC） and ultrafiltration（UF） and the independent UF were conducted to treat a micro-polluted alga-rich water. Effects of the two treatments on pollutant and microcystin-LR removal, as well as fouling control of PAC, were investigated. The results indicate that both of the two processes can remove the chlorophyll-a effectively. The maturities of nitrosomonas group and nitrobacteria are about 15 d and 20 d, respectively. The removal efficiencies of DOC and UV254 for the PAC/UF are 32.7% and 23.8%, and those of the independent UF process are 11.5% and 15.0%. Therefore, PAC can effectively enhance the organic removal and the MC-LR removal increases from 18.5% to 43.0% with the PAC addition, Moreover, PAC can mitigate the membrane fouling of UF process of alga-rich water. The integrated process of biological powdered activated carbon and UF tends to be a both economical and efficient technology for the treatment of MC-LR.