Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong.
Water Sci Technol. 2012;65(5):840-4. doi: 10.2166/wst.2012.841.
This study explored a sulfur cycle-associated biological phosphorus (P) removal process in a covered and non-aerated sequencing batch reactor (SBR) fed with volatile fatty acid (VFA) and sulfate separately. During the 60-day start-up, both phosphate release and uptake rates increased, while poly-phosphate cyclically increased and decreased accordingly. The P-release and P-uptake rates were associated with VFA uptake and sulfate reduction. The average ratio of potassium to phosphate during the P-uptake and P-release was also determined to be 0.29-0.31 mol K/mol P, which is close to a reported value (0.33) for biological phosphorus removal. All this evidence confirmed there was biological P removal in this reactor, in which metabolism could be different from conventional biological P removal.
本研究探索了在覆盖式非曝气序批式反应器（SBR）中，分别以挥发性脂肪酸（VFA）和硫酸盐为碳源和电子供体时，与硫循环有关的生物除磷过程。在 60 天的启动阶段，磷酸盐的释放和吸收速率均增加，而多磷酸盐则相应地周期性增加和减少。磷酸盐的释放和吸收速率与 VFA 的吸收和硫酸盐的还原有关。在磷酸盐的吸收和释放过程中，钾与磷酸盐的平均比值也确定为 0.29-0.31 mol K/mol P，这与报道的生物除磷值（0.33）接近。所有这些证据都证实了该反应器中存在生物除磷，其代谢可能与传统的生物除磷不同。
