Nurmiyanto Awaluddin, Kodera Hiroya, Kindaichi Tomonori, Ozaki Noriatsu, Aoi Yoshiteru, Ohashi Akiyoshi
Graduate School of Engineering, Hiroshima University.
Department of Environmental Engineering, Islamic University of Indonesia (UII).
Microbes Environ. 2017 Sep 27;32(3):260-267. doi: 10.1264/jsme2.ME17020. Epub 2017 Sep 9.
Candidatus Accumulibacter phosphatis (Accumulibacter), which plays an important role in enhanced biological phosphorus removal in wastewater treatment plants, is phylogenetically classified into two major types (Types I and II). Phosphate concentrations affect the Accumulibacter community of the biomass enriched in treatment plants. Therefore, in the present study, Accumulibacter enrichments were conducted using a down-flow hanging sponge reactor under five conditions and a wide range of controlled phosphate concentrations in order to investigate how phosphate governs the community. We found that excessive phosphate levels inhibited Accumulibacter activity, that this inhibitory effect was greater for Type II. In addition, the affinity of Type II for phosphate was higher than that of Type I. Type IIA-B dominated at a phosphate concentration less than 5 mg P L, while Type IA was dominant at 50 and 500 mg P L. These patterns of enrichment may be explained by an inhibition kinetics model.
“聚磷菌属”（Accumulibacter phosphatis，即聚磷菌）在污水处理厂的强化生物除磷过程中发挥着重要作用，在系统发育上可分为两种主要类型（I型和II型）。磷酸盐浓度会影响污水处理厂中富集的生物质中的聚磷菌群落。因此，在本研究中，使用下流式悬挂海绵反应器在五种条件和广泛控制的磷酸盐浓度下进行聚磷菌富集，以研究磷酸盐如何控制该群落。我们发现，过高的磷酸盐水平会抑制聚磷菌的活性，且这种抑制作用对II型聚磷菌更强。此外，II型聚磷菌对磷酸盐的亲和力高于I型。在磷酸盐浓度低于5 mg P/L时，IIA - B型占主导，而在50和500 mg P/L时，IA型占主导。这些富集模式可用抑制动力学模型来解释。
