Division of Environmental Science and Engineering, National University of Singapore, Singapore, Singapore.
J Appl Microbiol. 2010 Jun;108(6):2077-87. doi: 10.1111/j.1365-2672.2009.04612.x. Epub 2009 Oct 31.
To examine whether phosphorus and biodegradable organic carbon interact to impact biofilm density and physiological function of biofilm-forming bacteria under conditions relevant to chlorinated drinking water distribution systems.
The 2 x 2 factorial experiments with low and high levels of phosphorus and biodegradable organic carbon were performed on 4 -week-old drinking water biofilms in four separate pipe systems in the presence of chlorine. Experimental results revealed that biofilm heterotrophic plate count levels increased with the increase in biodegradable organic carbon concentration, showed no response to increases in levels of phosphorus and was not affected by interaction between phosphorus and biodegradable organic carbon. However, a significant positive interaction between phosphorus and biodegradable organic carbon was found to exist on biofilm mass and physiological function and/or metabolic potentials of biofilm communities; the effects of biodegradable organic carbon on biofilm mass and physiological function of biofilm-forming bacteria were accelerated in going from low to high level of phosphorus.
Biodegradable organic carbon was found to be the primary nutrient in regulating biofilm formation in drinking water regardless of the presence of chlorine. It can be therefore concluded that the removal of an easily biodegradable organic carbon is necessary to minimize the biofilm growth potential induced by the intrusion of phosphorus.
Phosphorus introduced to drinking water may interact with biodegradable organic carbon, thus leading to measurable impact on the biofilm formation.
研究在与氯化饮用水分配系统相关的条件下，磷和可生物降解有机碳是否相互作用，影响生物膜形成菌的生物膜密度和生理功能。
在四个单独的管道系统中，对 4 周龄饮用水生物膜进行了低磷和高磷与低生物可降解有机碳和高生物可降解有机碳的 2x2 析因实验。实验结果表明，生物膜异养平板计数水平随可生物降解有机碳浓度的增加而增加，对磷水平的增加没有反应，也不受磷与可生物降解有机碳之间相互作用的影响。然而，发现磷和可生物降解有机碳之间存在显著的正相互作用，影响生物膜的生物量和生理功能和/或生物膜群落的代谢潜力；从低磷水平到高磷水平，可生物降解有机碳对生物膜形成菌生物膜生物量和生理功能的影响加快。
无论是否存在氯，可生物降解有机碳被发现是调节饮用水中生物膜形成的主要营养物质。因此可以得出结论，去除易于生物降解的有机碳是将磷侵入引起的生物膜生长潜力降至最低所必需的。
引入饮用水中的磷可能与可生物降解有机碳相互作用，从而对生物膜形成产生可测量的影响。
