活性炭出水中颗粒物吸附细菌的紫外线消毒
首发时间:2009-02-17
摘要:近年来活性炭生物安全性问题引起广泛关注,本文采用紫外线消毒技术作为传统的氯消毒技术的替代技术进行生物安全控制研究。研究结果表明:在低紫外剂量(10mJ/cm2)时,颗粒物对细菌的保护作用较为明显,低紫外剂量下较长的紫外照射时间(低强度)更有利于细菌的灭活;与砂滤池出水相比,在相同的紫外剂量下,活性炭出水的紫外灭活率偏低,且随着紫外剂量的增加,活性炭出水的紫外灭活率增加不大,稳定在2.5-lg;在低紫外剂量考察紫外线对活性炭出水中颗粒物吸附细菌的灭活效果,低强度紫外线灭活效果要好于高强度,随着紫外剂量的增加,紫外线对颗粒物上吸附细菌灭活率与紫外线对活性炭出水中包括颗粒物吸附细菌和水中游离细菌的总体灭活率的差距越来越大。
关键词: 紫外线消毒 活性炭出水 紫外强度 颗粒物上吸附细菌
For information in English, please click here
Study on Disinfection of Bacteria Attached Microparticles in Activated Carbon Effluent by Ultraviolet
Abstract:Recent years, the biological security of activated carbon effluent attracts widely attention. This study use UV disinfection as alternative technology of traditional chlorine disinfection. The results shows that microparticles can hinder bacteria. When in low UV dose(10mJ/cm2), this phenomenon is more obviously. Under low UV dose, longer UV exposure time(low UV intensity) is beneficial to the inactivation of bacteria. Compared with the UV inactivation effect of sand filter effluent, inactivation effect of activated carbon effluent under the same UV dose is low. With the UV dose increasing, the inactivation effect only increases a little. Inactivation rate keeps in the level of 2.5-lg. Examining the UV inactivation effect of bacteria attached microparticles under the range of low UV dose shows that the inactivation effect of low UV intensity is better than high UV intensity. With the UV dose increasing, the difference between the inactivation effect of bacteria attached microparticles and bacteria in activated carbon effluent including bacteria attached microparticles and free bacteria in effluent is more and more big.
Keywords: UV disinfection activated carbon effluent UV intensity bacteria attached microparticles
基金:
论文图表:
引用
No.2907540220312348****
同行评议
勘误表
活性炭出水中颗粒物吸附细菌的紫外线消毒
评论
全部评论0/1000