National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Department of Environmental Engineering, Beijing University of Technology, Beijing 100124, China.
National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Department of Environmental Engineering, Beijing University of Technology, Beijing 100124, China.
Bioresour Technol. 2020 Feb;297:122431. doi: 10.1016/j.biortech.2019.122431. Epub 2019 Nov 14.
Polyaluminium chloride (PAC) was added into the biological phosphorus removal (BPR) systems to investigate the populations of polyphosphate and glycogen accumulating organisms (PAOs and GAOs). Typical BPR performed under Al:P of 1:1, while BPR almost disappeared at Al:P of 4:1. Even with high PAC addition, PAOs still existed in systems. Compared to the BPR with no PAC addition, the relative abundance of Accumulibacter, Tetrasphaera and Commnadaceae slightly increased with PAC addition. The relative abundance of Dechloromonas was improved from 0.87% to 3.82%, becoming the most dominant PAOs. The specific structures of Accumulibacter and Tetrasphaera changed little, but that of Dechloromonas and Comamonadaceae significantly altered. Regarding the GAOs, the relative abundance of Competibacter and Defluviicoccus significantly declined. Additionally, PAC addition effectively inhibited the proliferation of filamentous bacteria, indicating its potential in inhibiting the sludge filamentous bulking. This study provided guidance for the selection of the phosphorus removal process and operational conditions.
聚合氯化铝（PAC）被添加到生物除磷（BPR）系统中，以研究聚磷酸盐和糖原积累菌（PAOs 和 GAOs）的种群。在 Al:P 为 1:1 的情况下进行典型的 BPR，而在 Al:P 为 4:1 的情况下 BPR 几乎消失。即使添加高浓度的 PAC，PAOs 仍存在于系统中。与没有添加 PAC 的 BPR 相比，随着 PAC 的添加，Accumulibacter、Tetrasphaera 和 Comamonadaceae 的相对丰度略有增加。Dechloromonas 的相对丰度从 0.87%提高到 3.82%，成为最主要的 PAOs。Accumulibacter 和 Tetrasphaera 的特定结构变化不大，但 Dechloromonas 和 Comamonadaceae 的结构明显改变。至于 GAOs，Competibacter 和 Defluviicoccus 的相对丰度显著下降。此外，PAC 的添加有效地抑制了丝状菌的增殖，表明其在抑制污泥丝状膨胀方面具有潜力。本研究为磷去除工艺和操作条件的选择提供了指导。
