Karnik B S, Davies S H, Baumann M J, Masten S J
Department of Civil & Environmental Engineering, Michigan State University, East Lansing, MI 48824, USA.
Water Res. 2005 Aug;39(13):2839-50. doi: 10.1016/j.watres.2005.04.073.
The effects of combined ozonation and membrane filtration on the removal of the natural organic matter (NOM) and the formation of disinfection by-products (DBPs) were investigated. Ozonation/filtration resulted in a reduction of up to 50% in the dissolved organic carbon (DOC) concentration. Furthermore, humic substances were converted to non-humic substances, with changes in the humic and non-humic substance concentrations of up to -50% and +20%, respectively. Ozonation/filtration resulted in the formation of partially oxidized compounds from NOM that were less reactive with chlorine, decreasing the concentration of simulated distribution system total trihalomethanes (SDS TTHMs) and simulated distribution system halo acetic acids (SDS HAAs) by up to 80% and 65%, respectively. Reducing the molecular weight cut-off (MWCO) of the membranes resulted in reductions in the concentrations of SDS TTHMs and SDS HAAs. Using a membrane with a 5 kD MWCO, the minimum gaseous ozone concentration required to bring about effective NOM degradation and meet regulatory requirements for chlorinated DBPs was 2.5 g/m(3).
研究了臭氧氧化与膜过滤联合作用对天然有机物（NOM）去除及消毒副产物（DBPs）形成的影响。臭氧氧化/过滤使溶解有机碳（DOC）浓度降低了50%。此外，腐殖质转化为非腐殖质，腐殖质和非腐殖质浓度变化分别高达-50%和+20%。臭氧氧化/过滤导致NOM形成了与氯反应性较低的部分氧化化合物，使模拟分配系统总三卤甲烷（SDS TTHMs）和模拟分配系统卤乙酸（SDS HAAs）浓度分别降低了80%和65%。降低膜的截留分子量（MWCO）会导致SDS TTHMs和SDS HAAs浓度降低。使用截留分子量为5 kD的膜时，实现有效NOM降解并满足氯化DBPs监管要求所需的最低气态臭氧浓度为2.5 g/m³。
