Department of Civil Engineering, National Chi-Nan University, Puli 545, Taiwan, ROC.
Bioresour Technol. 2011 Dec;102(23):11043-7. doi: 10.1016/j.biortech.2011.09.050. Epub 2011 Sep 21.
This study explored the influence of sludge retention time (SRT) on tolerance of copper invasion for polyphosphate accumulating organisms (PAOs) in an enhanced biological phosphorus removal (EBPR). The experimental data showed the anaerobic polyhydroxyalkanoates (PHA) storage for the sludge at 10d SRT was less influenced by copper invasion than those at 5d and 15d SRTs. The reaction of PAOs aerobically taking up phosphate for the sludge at 5d or 15d SRT almost ceased at 2 mg Cu L(-1), whereas PAOs in the sludge at 10d SRT retained half of the ability to take up phosphate. Both the PHAs degradation and synthesis rates decreased with increasing copper concentration, regardless of the SRTs. However, the copper inhibition of the former was greater than that of the later.
本研究探讨了污泥停留时间（SRT）对强化生物除磷（EBPR）中聚磷菌（PAO）耐受铜入侵能力的影响。实验数据表明，在 10d SRT 下，污泥中聚羟烷酸（PHA）的厌氧储存受铜入侵的影响小于在 5d 和 15d SRT 下的储存。在 5d 或 15d SRT 下，PAO 好氧吸磷的反应几乎在 2mg Cu L(-1)时停止，而在 10d SRT 下的污泥中，PAO 仍保留一半的吸磷能力。无论 SRT 如何，随着铜浓度的增加，PHA 的降解和合成速率均下降。然而，前者的铜抑制作用大于后者。
