混凝沉淀-生物粉末炭/超滤组合工艺处理含嗅味微污染水研究

针对富营养化湖库水普遍存在的藻类、有机物污染及嗅味问题,以实验室模拟的含嗅味微污染水为试验水样,研究了混凝沉淀-生物粉末活性炭/浸没式超滤(BPAC/SUF)组合工艺对叶绿素a、有机物和嗅味污染物的去除效果及对膜污染的影响,探讨一种有效的含嗅味微污染水处理技术. 结果表明,混凝沉淀-BPAC/SUF组合工艺对叶绿素a的去除效果显著,平均去除率达95.5%;组合工艺可强化有机物的去除效果,对UV₂₅₄、DOC和COD_Mn的平均去除率分别为31.0%,30.4%和51.0%;对二甲基异冰片(2-MIB)和土臭素(GSM)有较好的去除效果,平均去除率为74.8%和75.1%,出水平均浓度均在嗅阈值以下;整个实验期间,跨膜压差仅增长了3.80 kPa,膜污染得到很好的缓解. 

Treatment of Taste and Odor Contained Micro-Polluted Raw Water by Coagulation-Sedimentation and BPAC/SUF Combined Process

To deal with the issue of water polluted by algae, organic matters and taste and odor in eutrophic water of lakes and reservoirs, a combined process of coagulation-sedimentation combined with biological powered activated carbon and submerged ultrafiltration(BPAC/SUF)was applied to study the removal effects of chlorophyll a, organic matters and taste and odor, and to investigate the membrane fouling characteristic of micro-polluted water sample with artificial taste and odor in lab-scale. The results show that remarkable removal rate of chlorophyll a could reach to 95.5%, and the organic matters' removal efficiency was obviously improved with the average removal rate of 31.0% for UV₂₅₄, 30.4% for DOC and 51.0% for COD_Mn, respectively. Better removal effect on 2-MIB and GSM were achieved with 74.8% and 75.1%, respectively. The average taste and odor level of treated water was below the threshold value. Membrane fouling was well controlled during the whole experimental period, and the trans-membrane pressure was increased only by 3.80 kPa.