两点短时游离氯后转氯胺的顺序氯化消毒工艺研究

基于顺序氯化消毒工艺的原理，采用两点短时游离氯后转氯胺的两点顺序氯化消毒工艺，即在过滤和清水池前的两点分别加氯，并在清水池加氯后立即加氨转化为氯胺消毒的工艺，该工艺在常规处理工艺的给水厂进行了消毒试验.结果表明，加氯点的适当提前，不仅有利于控制消毒副产物的生成量，而且有效抑制了滤池中的生物膜滋生.两点顺序氯化消毒工艺中生成的卤代消毒副产物比相同条件下一次性加入等量的氯消毒剂的消毒方法产生的三卤甲烷(THMs)平均减少了51.6％，卤乙酸(HAAs)平均减少了46.7％.细菌学指标HPC的结果也显示出了该工艺在保障水质的微生物安全方面的优势.

Use of Two-Points-Short-Term Free Chlorine Plus Chloramines Disinfection Process in Conventional Treatments of Water Supply

Two-points-short-term free chlorine plus chloramines disinfection process was used in conventional treatments of water supply. The process is adding chlorine at the start of filtration and clear well respectively, and then after a few minutes chlorine disinfection in clear well adding ammonia to change the chlorine to chloramines. The point of chlorine dosing move up to the filtration process can decrease disinfection by-product yield and control bio-film growth in filtration process. Compared with adding equal quantity chlorine once, this process reduced 51.6% of THMs and 46.7% of HAAs. HPC result also showed advantage in microorganism controlling.