An Dong, Li Wei-guang, Cui Fu-yi, He Xin, Zhang Jin-song
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
J Environ Sci (China). 2005;17(2):315-8.
The removal of disinfection by-products formation potential (DBPFP) in artificially intensified biological activated carbon (IBAC) process which is developed on the basis of traditional ozone granular activated carbon was evaluated. By IBAC removals of 31% and 68% for THMFP and HAAFP were obtained respectively. Under identical conditions, the removals of the same substances were 4% and 32% respectively only by the granular activated carbon (GAC) process. Compared with GAC, the high removal rates of the two formed potential substances were due to the increasing of bioactivity of the media and the synergistic capabilities of biological degradation cooperating with lactivated carbon adsorption of organic compounds. A clear linear correlation (R2 = 0.9562 and R2 = 0.9007) between DOC HAAFP removal rate and Empty Bed Contact Time (EBCT) of IBAC process was observed, while that between THMFP removal rate and EBCT of GAC was R2 = 0.9782. In addition certain linear correlations between THMFP, HAAFP and UV254 (R2 = 0.855 and R2 = 0.7702) were found for the treated water. For IBAC process there are also more advantages such as long backwashing cycle time, low backwashing intensity and prolonging activated carbon lifetime and so on.
对在传统臭氧颗粒活性炭基础上开发的人工强化生物活性炭（IBAC）工艺中消毒副产物生成潜力（DBPFP）的去除情况进行了评估。通过IBAC工艺，三卤甲烷生成潜力（THMFP）和卤乙酸生成潜力（HAAFP）的去除率分别达到31%和68%。在相同条件下，仅通过颗粒活性炭（GAC）工艺，相同物质的去除率分别为4%和32%。与GAC相比，这两种生成潜力物质的高去除率归因于介质生物活性的提高以及生物降解与活性炭对有机化合物吸附的协同能力。观察到IBAC工艺中溶解性有机碳（DOC）-HAAFP去除率与空床接触时间（EBCT）之间存在明显的线性相关性（R2 = 0.9562和R2 = 0.9007），而GAC工艺中THMFP去除率与EBCT之间的R2 = 0.9782。此外，对于处理后的水，发现THMFP、HAAFP与UV254之间存在一定的线性相关性（R2 = 0.855和R2 = 0.7702）。对于IBAC工艺，还有更多优点，如反冲洗周期长、反冲洗强度低以及延长活性炭使用寿命等。
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