Department of Bioenvironmental Engineering and R&D Center for Membrane Technology, Chun Yuan Christian University, Chungli 320, Taiwan.
Bioresour Technol. 2011 Sep;102(17):8165-70. doi: 10.1016/j.biortech.2011.06.022. Epub 2011 Jun 12.
Sludge in a sequential batch reactor (SBR) system was used to investigate the effect of lead toxicity on metabolisms of polyphosphate accumulating organisms (PAOs) and glycogen accumulating organisms (GAOs) communities fed with acetic acid or glucose as their sole carbon source, respectively. Results showed that the effect of lead on substrate utilization of both PAOs and GAOs was insignificant. However, lead substantially inhibited both of phosphate release and uptake of PAOs. In high concentration of acetic acid trials, an abnormal aerobic phosphate release was observed instead of phosphate uptake and the release rate increased with increasing lead concentration. Results also showed that PAOs could normally synthesize polyhydroxybutyrate (PHB) in the anaerobic phase even though lead concentration was 40 mg L(-1). However, they could not aerobically utilize PHB normally in the presence of lead. On the other hand, GAOs could not normally metabolize polyhydroxyvalerate (PHV) in both the anaerobic and aerobic phases.
序批式间歇反应器（SBR）中的污泥被用于研究铅毒性对以乙酸或葡萄糖分别作为唯一碳源的聚磷菌（PAOs）和糖原积累菌（GAOs）群落代谢的影响。结果表明，铅对 PAOs 和 GAOs 的基质利用影响不显著。然而，铅显著抑制了 PAOs 的磷释放和吸收。在高浓度乙酸试验中，观察到异常的好氧磷释放而不是磷吸收，并且释放速率随铅浓度的增加而增加。结果还表明，即使铅浓度为 40mg/L(-1)，PAOs 也可以在厌氧阶段正常合成聚羟基丁酸酯（PHB）。然而，在存在铅的情况下，它们不能正常地好氧利用 PHB。另一方面，GAOs 不能在厌氧和有氧阶段正常代谢聚羟基戊酸酯（PHV）。
