摘要
研究了原水中的氨氮对饮用水预氯化工艺处理效果的影响。试验结果表明,随着氨氮浓度的升高,预氯化工艺的沉后水浊度略有升高,但是与常规工艺相比仍具有明显的助凝效果,沉后水的UV254去除率降低,细菌总数稳定在50CFU/mL以下;预氯化在较短时间内生成高浓度的THMs,氨氮能显著降低THMs生成量,因此可采用预氯胺化取代折点预氯化来降低在饮用水中产生有害化学物质的风险。
The effect of ammonia-nitrogen in raw water on the treatment of drinking water by prechlorination process was studied. The results of the test showed that, although with the increasing of the ammonia-nitrogen concentration, the turbidity of water after the sedimentation by the prechlorination process was slightly increased, the said process still had obvious aid-coagulation effect compared with traditional process, the removal rate of UV254 in water after the sedimentation was decreased and the total bacterial counts was below 50 CFU/mL. As high concentration of THMs would be quickly formed with the prechlorination process, and ammonia-nitrogen could effectively reduce the yields of THMs, prechloramination might be used to substitute break point prechlorination, so as to reduce the risk of harmful chemical substances＇ forming in drinking water.
出处
《工业用水与废水》
CAS
2006年第2期12-15,共4页
Industrial Water & Wastewater
基金
国家高技术研究发展计划(863)项目(2002AA601140)
关键词
给水处理
预氯化
氨氮
消毒副产物
feed water treatment
prechlorination
ammonia-nitrogen
disinfection by-products
