| 氯胺消毒对铜和不锈钢管壁生物膜的控制作用 |
| 摘要点击 2979 全文点击 2208 投稿时间：2007-12-05 修订日期：2008-04-05 |
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| 中文关键词 氯胺 生物膜 异养菌 铜 不锈钢 |
| 英文关键词 chloramines biofilm HPC copper stainless steel |
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| 中文摘要 |
| 以松花江为水源的哈尔滨某水厂出厂水为研究对象，采用生物膜培养反应器(rotating annular bioreactor, RAB)模拟给水管网系统，考察了氯胺对铜和不锈钢2种管材上生物膜的控制情况.结果表明，在无氯胺情况下运行时，铜和不锈钢挂片上的生物膜在第18d和21 d达到最大值，其生物量分别为5.5×１０3 CFU/cm2和2.5×１０5 CFU/cm2，生物膜达到稳定时生物量分别为1.0×１０3 CFU/cm2和1.3×１０5 CFU/cm2，铜挂片上的生物量明显低于不锈钢.反应器在有氯胺状态下运行时，铜和不锈钢挂片上最大生物量为5.0×102 CFU/cm2和5.0×１０4 CFU/cm2，分别低于无氯胺情况下1个数量级，达到稳定状态时，其生物量分别为10 CFU/cm2以下和3.5×１０4 CFU/cm2，说明氯胺对处于稳定状态的生物膜具有一定的控制作用，对铜挂片上的生物膜具有更明显的控制效果.对消毒剂投量、管材和管壁生物膜HPC进行分析可知，生物膜HPC与余氯胺具有良好的指数相关关系，增加氯胺投量可以降低生物膜HPC数量，氯胺和铜挂片对管壁上的生物膜具有协同灭菌作用. |
| 英文摘要 |
| Two rotating annular bioreactors (RABs) with copper and stainless steel pipe materials were adopted in the study, the effects of these two pipe materials and chloramines disinfection on biofilms formation in drinking water distribution system were evaluated. The maximum viable bacterial number in biofilm of copper and stainless steel reached 5.5×１０3 CFU/cm2 and 2.5×１０5 CFU/cm2 at 18th and 21st day without chloramines, and the viable bacterial number at the apparent steady state was 1.0×１０3 CFU/cm2 and 1.3×１０5 CFU/cm2 respectively. It was obvious that the biomass on copper materials was lower than that of the stainless steel. The maximum viable bacterial on copper and stainless steel under chloramines was 5.0×102 CFU/cm2 and 5.0×１０4 CFU/cm2, which was one order of magnitude lower than that of without chloramines, and its number was 10 CFU/cm2 and 3.5×１０4 CFU/cm2 at the steady state. These results illustrated that chloramines had apparent ability in controlling biomass when the biofilm was on steady states, especially for copper material. There was exponential relationship between biomass in biofilm and residue chloramines, which meant less biomass with more chloramines, synergistic effects were observed between chloramines and copper materials on biomass in biofilms inactivation. |
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