| 臭氧-生物活性炭对南方河网典型污染物的去除特性 |
| 摘要点击 3996 全文点击 2288 投稿时间：2008-06-10 修订日期：2008-08-27 |
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| 中文关键词 臭氧-生物活性炭 分子量 河网水源 溴酸盐 三卤甲烷(THMs) |
| 英文关键词 ozone-biological activated carbon molecular weight water source of brooky regions, bromate trihalomethanes |
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| 中文摘要 |
| 以我国南方河网原水中有机物和季节性溴化物(Br-)为对象，研究臭氧-生物活性炭(BAC)工艺净化过程中有机物相对分子质量(Mr)分布变化及溴酸盐(BrO-3)和消毒副产物(THMs)的形成规律.结果表明，原水中Mr在103以下的有机物(DOC)约占总量的80%，常规工艺主要表现为对Mr >100×103有机物的去除，出水DOC去除率为8%、 SUVA(UV254/DOC)值下降14%；臭氧-活性炭工艺主要去除103<Mr<5×103的有机物，但亲水性小分子有机物抑制生物降解作用，出水DOC去除率仅提高至30%、SUVA值下降31%.当臭氧投加量高于2 mg/Ｌ时，臭氧氧化出水中BrO-3增加明显，氧化过程原水中Br-浓度升高BrO-3生成量增大；生物活性炭对BrO-3的去除率平均仅为13%，且波动较大.与常规处理相比，臭氧-生物活性炭处理后各类THMs均有减少，总量减少40%；但氯量和Br-对溴代副产物影响大，主要为CHBr3生成量增加. |
| 英文摘要 |
| The products of relative molecular weight (Mr) distribution, bromate (BrO-3) and trihalomethanes (THMs) were studied by ozone-biological activated carbon(O3_BAC) process for treating organic matters and bromide (Br-) in water source of southern brooky regions of China. The experimental results showed that dissolved organic matters (DOC) with Mr lower than 103 accounted for 80% of the total. The removal rate of DOC and SUVA (UV254/DOC) were 8% and 14% respectively by traditional treatment process with main removal only for ones with Mr higher than 100×103. Only 30% of DOC and 31% of SUVA were decreased by O3-BAC process for the removal of ones with Mr between 103 and 5×103, in which the biotic degradation was certainly restricted by predominant organic matters of hydrophilic and Mr was lower than 1 000. An obvious increase of BrO-3 occurred in the effluent from ozone oxidation process when the dose of ozone beyond 2 mg/Ｌ which increased Br- concentration. This could increase the product of BrO-3. A poor and unstable removal effect of BrO-3 was observed in the effluent of BAC process during the experiment. Each species of THMs, decreasing 40% of total, was reduced by O3-BAC treatment compared with the traditional treatment process. But the products of brominated trihalomethanes, especially CHBr3 would be markedly increased by enhanced chlorine dosage and Br- concentration. |
