摘要
以次氯酸钠代替液氯消毒是未来饮用水消毒的重要发展方向,但对于次氯酸钠消毒对供水水质的影响一直缺乏生产性试验研究。以上海2个净水厂实际生产工艺考察了液氯和次氯酸钠2种消毒剂的消毒效果,对于其在微生物消毒效果、消毒副产物生成和对氮磷及有机物去除方面进行了比较分析。研究发现,2种消毒方式对微生物的杀菌效率基本相同,但是次氯酸钠消毒出水中三氯甲烷和卤乙酸含量均比液氯消毒低,而且其在NH3-N、TP和CODMn的去除方面也具有更好的处理效果。结果表明,采用次氯酸钠替代液氯消毒,在保证消毒效果的前提下能够降低出水中消毒副产物的产生量,取得更好的出水水质,是一种较为理想的消毒方式。
Using sodium hypochlorite instead of liquid chlorine as disinfectant is an important development direction of drinking water disinfection in the future;however,there are only a few full-scale tests on the effect of sodium hypochlorite disinfection on water supply quality have been carried out and studied so far.The disinfection effect of liquid chlorine and sodium hypochlorite were investigated through the full-scale tests in two water supply plants of Shanghai,and the effects of the said two disinfectants on microorganism disinfection,disinfection by-products formation and nitrogen,phosphorus and organic matters removal were compared.The investigation results indicated that,the bactericidal efficiencies of the said two disinfectants for microorganisms were almost same,but the mass concentration of chloroform and haloacetic acids in the effluent water through the sodium hypochlorite disinfection were lower than that through the liquid chlorine disinfection;furthermore,the performance of sodium hypochlorite for NH3-N,TP and CODMn removal was also better.The results of the test showed that,compared with liquid chlorine,sodium hypochlorite could reduce the content of disinfection by-products in effluent water and gain a better effluent water quality under the condition of assuring the disinfection effect,which was a promising disinfectant.
出处
《工业用水与废水》
CAS
2011年第2期14-17,75,共5页
Industrial Water & Wastewater
关键词
液氯
次氯酸钠
消毒副产物
liquid chlorine
sodium hypochlorite
disinfection by-products
