Determination of nutrients limiting biofilm formation and the subsequent impact on disinfectant decay
Determination of nutrients limiting biofilm formation and the subsequent impact on disinfectant decay
复制标题
DOI：
10.1016/s0043-1354(00)00572-8
复制
发表时间：
2001-08-01
期刊：
影响因子：
12.8
通讯作者：
Angles, ML
中科院分区：
文献类型：
--
作者：
Chandy, JP;Angles, ML
了解有机和无机营养物质对生物膜发育的贡献，以及随后形成的生物膜对消毒剂腐烂的影响，是分配系统管理策略的重要要求。营养限制可能是在不增加消毒剂剂量的情况下控制生物膜发展的一种方法。人们对此知之甚少。然而，分配系统中生物膜的营养需求。确实是这样。向分配系统添加营养物质对生物膜发育的影响以及生物膜发育对消毒剂腐烂的影响仍然知之甚少。这项研究使用环形反应器来确定悉尼两个不同来源的饮用水中生物膜形成的营养限制，以及随后生物膜形成对消毒剂腐烂的影响。悉尼水中生物膜的发育受有机碳的限制，生物膜的发育促进了氯胺的腐烂。更有甚者。生物膜的形成是在氯胺存在的情况下发生的。生物膜对消毒剂浓度增加的反应能力取决于生物膜的生物量。在一项使用含VER的氯化饮用水的对比研究中；低水平的有机碳。未检测到生物被膜的形成。有机碳的去除导致氯的持久性更强，从而导致更好的生物膜控制。研究还表明，生物膜可以为水相提供细胞。研究结果表明，rh；lt处理和系统管理策略应包括有机碳去除，通过抑制细菌生长和增强消毒剂持久性相结合来限制生物膜的发展。(C)2001爱思唯尔科学有限公司。保留所有权利。
Understanding the contribution of both organic and inorganic nutrients to biofilm development and the subsequent Impact of developed biofilms on disinfectant decay are important requirements For distribution system management strategies. Nutrient limitation may be one way to control biofilm development without increasing disinfectant dosing. Little is known. however, of the nutrient requirements of biofilms in distribution systems. Indeed. the effects on biofilm development due to the addition of nutrients to distribution systems and what impact biofilm development may have on disinfectant decay is still poorly understood. This study used annular reactors to determine the nutrients limiting for biofilm development in drinking water from two different Sydney sources and the subsequent effects of biofilm development on disinfectant decay. It was round that biofilm development in Sydney water was limited by organic carbon and that biofilm development promoted chloramine decay. Moreover. biofilm development occurred in the presence of chloramine. The ability of biofilms to respond to increases in disinfectant concentrations was dependent on the biomass of the biofilms. In a comparative study using chlorinated drinking water containing ver); low levels of organic carbon. biofilm development was not detected. Removal of organic carbon resulted in greater persistence of chlorine, which led to greater biofilm control. It was also shown that biofilms could contribute cells to the aqueous phase. The results of the study indicate rh;lt treatment and system management strategies should incorporate organic carbon removal to limit biofilm development through a combination of retarding bacterial growth and enhancing disinfectant persistence. (C) 2001 Elsevier Science Ltd. All rights reserved.