紫外线对饮用水中两种代表性微生物的灭活研究

发布时间：2018-05-07 21:28

本文选题：紫外线消毒 + 紫外线剂量　；参考：《节能》2016年12期

【摘要】：使用CS型紫外线消毒装置,以自来水中易被灭活的大肠杆菌和不易被灭活的枯草芽孢杆菌为代表性微生物进行灭活实验,对其灭活效果分析。实验结果表明:在紫外线照射剂量较小时,大肠杆菌和枯草芽孢杆菌的存活数和灭活率都随生物负荷的增加而增加。相同条件下,紫外线对大肠杆菌的灭活效果明显,当紫外线剂量为9.9m J/cm~2时,灭活效果达到3.2个对数级。由于浊度对水的透光率有一定的影响,所以影响紫外线对大肠杆菌的灭火效果,当浊度达到4NTU时,灭活效果明显降低。紫外线对枯草芽孢杆菌的灭活效果比氯好,当CT值为300mg/(L·min)时,芽孢杆菌灭活率达到0.53个对数级。当紫外线剂量为41.3m J/cm~2时,枯草芽孢杆菌灭活效果达到3.2个对数级。与经过48h培养的枯草芽孢杆菌相比,24h培养的芽孢杆菌对紫外线更敏感,灭活率更高。
[Abstract]:Using the CS ultraviolet disinfection device, the inactivated Escherichia coli and the inactivated Bacillus subtilis were inactivated by the inactivated Bacillus subtilis and the inactivation effect was analyzed. The results showed that the survival and inactivation rate of Escherichia coli and Bacillus subtilis were all along with the low dose of ultraviolet radiation. Under the same condition, the inactivation effect of ultraviolet to Escherichia coli is obvious. When the ultraviolet dose is 9.9m J/cm~2, the inactivation effect reaches 3.2 logarithmic levels. Because turbidity has a certain influence on the light transmittance of water, the effect of ultraviolet light on Escherichia coli is affected. When the turbidity reaches 4NTU, the inactivation effect is clear. The inactivation effect of ultraviolet to Bacillus subtilis was better than that of chlorine. When the CT value was 300mg/ (L. Min), the inactivation rate of bacillus was 0.53 logarithmic grade. When the ultraviolet dose was 41.3m J/cm~2, the inactivation effect of Bacillus subtilis reached 3.2 logarithmic grade. Compared with Bacillus subtilis cultured by 48h, Bacillus subtilis cultured in 24h It is more sensitive to ultraviolet light and higher inactivation rate.

【作者单位】：沈阳建筑大学市政与环境工程学院;沈阳世创工程集团有限公司;
【分类号】：R123.6

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