摘要
以饮用水中的异养茵和大肠杆菌为考察对象，比较了单向流和循环流电化学消毒工艺的处理效果，探讨了氯离子浓度、pH值、流量对循环流电化学消毒效果的影响。结果表明，对于细菌浓度较高[（1～10）×10^5CFU／mL]的自来水，在进水氯离子浓度较低（17．5mg／L）的情况下，单向流电化学消毒的效果并不理想，不宜用作二次水箱水的消毒方式；而采用循环流电化学消毒工艺不仅可改善消毒效果，还可解决二次水箱水因停留时间长而引起水质较差的问题。对循环流电化学消毒工艺的影响因素分析表明，氯离子浓度的影响最为显著，氯离子浓度越大则对细菌的灭活效果越好；低pH值有利于提高细菌的灭活效果，低流量下细菌的灭活效果比高流量下的略好。
The effects of HPC and E. coli removal were compared, specifically the effects of uniflow （direct-flow） and circular-flow electrochemical disinfection. The influences of Cl^- concentration, pH value, and flux on the circular-flow electrochemical disinfection process were investigated. The results show that tap water （ Cl^- = 17.5 mg/L） containing high level （ 10^5 - 10^6 CFU/mL） of bacteria does not meet expectations for the uniflow electrochemical disinfection process which is not suitable for disinfection of water in the secondary tank. By contraries, the circular-flow electrochemical disinfection process can not only achieve preferable removal effects, but also shorten the retention time of water in the secondary tank, which improves the water quality. The analysis of influencing factors shows that chloride concentration in the influent is the most significant of the three factors. Higher chloride concentration, lower pH value, and lower flux can improve disinfection effects.
出处
《中国给水排水》
CAS
CSCD
北大核心
2006年第23期70-73,共4页
China Water & Wastewater
关键词
电化学消毒
余氯
异养菌数
二次水箱水
electrochemical disinfection
residual chlorine
HPC
water of secondary tank
