再生水用作循环冷却水的复配杀生剂研究

Research on complex biocide in circulating cooling water supplied by reclaimed water

为研究再生水用作循环冷却水补充水源的可行性,比较不同杀生剂的杀生效果,获得杀生效果好、投加量少的复配杀生剂,以北方某市再生水厂出厂水为研究对象,在水质分析的基础上以异养菌总数、铁细菌总数为检测指标,研究了3种氧化性杀生剂以及2种非氧化性杀生剂单独作用时的杀生效果,发现次氯酸钠与异噻唑啉酮的协同性较好,而二氧化氯与洁尔灭的协同性较好。

In order to study the possibility of using reclaimed water as the make-up water source in circulating cooling systems, the biocidal effect of different biocides has been compared. Complex biocides with better biocidal effect and low dosage have thus been obtained. The effluent from a reclaimed water plant in a northern city is taken as research target. Based on the analysis of water quality, the biocidal effects of three kinds of oxidizing biocides and two kinds of nonoxidizing biocides,which are used individually,are studied by measuring the total number of heterotrophic bacteria and total number of iron bacteria in circulating cooling water. The results show that sodium hypochlorite could cooperate well with isothiazolinone, while chlorine dioxide could cooperate well with geramine.