National University of Ireland, Galway, Ireland.
Water Sci Technol. 2010;61(10):2433-41. doi: 10.2166/wst.2010.079.
Nutrient removal, microbial community and sludge settlement were examined in two 3-litre laboratory-scale anaerobic/aerobic sequencing batch reactors (SBRs). One SBR was operated at 10 degrees C and the other SBR at 20 degrees C. Different from conventional enhanced biological phosphorus removal, most of the soluble sodium acetate was removed in the aerobic phase and no organic carbon uptake or biological phosphorus release occurred in the anaerobic phase. In this type of anaerobic/aerobic SBR, the phosphorus removal and sludge settlement seemed to be unstable, and the dominant microorganism was Zoogloea sp. Although no excess biological phosphorus removal occurred, extracellular phosphorus precipitation contributed a significant proportion to total phosphorus removed. Sludge volume index decreased with increasing phosphorus contents in the biomass under all conditions. The functions of extracellular polymeric substances in sludge settlement and phosphorus removal depended on the environmental conditions applied.
在两个 3 升实验室规模的厌氧/好氧序批式反应器 (SBR) 中研究了营养物质去除、微生物群落和污泥沉降性能。一个 SBR 在 10°C 下运行，另一个 SBR 在 20°C 下运行。与传统的强化生物除磷不同，大部分可溶性乙酸钠在好氧阶段去除，厌氧阶段没有有机碳吸收或生物磷释放。在这种类型的厌氧/好氧 SBR 中，磷的去除和污泥沉降似乎不稳定，优势微生物是动胶菌属。尽管没有发生过量的生物除磷，但胞外磷沉淀对去除的总磷贡献了很大比例。在所有条件下，随着生物量中磷含量的增加，污泥体积指数降低。胞外聚合物在污泥沉降和磷去除中的作用取决于所施加的环境条件。
