Chen Chao, Zhang Xiao-Jian, He Wen-Jie, Han Hong-Da, Zhu Lin-Xia, Wang Yun, Liu Jing
Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China.
Huan Jing Ke Xue. 2006 Jan;27(1):74-9.
A new safe chlorination disinfection process, the sequential disinfection process with short-term free chlorine plus chloramines was investigated its efficiency on control of indices of microorganism, disinfection by-products and bio-stability. This disinfection process may take the advantage of free chlorine's quick inactivation of microorganism and chloramines' low DBP yield and long-term residual. Thus, both control of microorganisms and DBPs can be achieved effectively and economically. The pilot test results show that safe chlorination disinfection process has a little better efficiency on total bacteria count, HPC and total coliform count than free chlorination disinfection, which indicate that free chlorine and chloramines might have the synergetic disinfection effect for their different attacking targets. It also had the same inactivation efficiency on polio virus and coliphage f2 as free chlorination in 120 minutes contact time. Sequential chlorination disinfection process could reduce 35.8% - 77.0% yield of trihalomethane and 36.6% - 54.8% yield of haloacetic acids. The poorer quality the water had, the more advantage the safe-chlorination disinfection had than free chlorination disinfection one. Moreover, sequential chlorination had better efficiency on bio-stability control than free chlorination.
研究了一种新型安全氯化消毒工艺——短期游离氯加氯胺的顺序消毒工艺对微生物指标、消毒副产物和生物稳定性的控制效果。该消毒工艺可利用游离氯对微生物的快速灭活作用以及氯胺产生消毒副产物少和长期残留的特点。因此，能有效且经济地实现对微生物和消毒副产物的控制。中试结果表明，安全氯化消毒工艺对总细菌数、异养菌平板计数和总大肠菌群数的去除效果略优于自由氯消毒，这表明游离氯和氯胺因其不同的攻击靶点可能具有协同消毒作用。在120分钟接触时间内，其对脊髓灰质炎病毒和大肠杆菌噬菌体f2的灭活效果与自由氯消毒相同。顺序氯化消毒工艺可使三卤甲烷的生成量降低35.8% - 77.0%，卤乙酸的生成量降低36.6% - 54.8%。水质越差，安全氯化消毒工艺相对于自由氯消毒工艺的优势就越明显。此外，顺序氯化消毒在生物稳定性控制方面比自由氯消毒效果更好。
