游离亚硝态氮对强化生物除磷系统中关键厌氧过程的影响。

The effect of free nitrous acid on key anaerobic processes in enhanced biological phosphorus removal systems.

机构信息

Advanced Water Management Centre (AWMC), The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia.

出版信息

Bioresour Technol. 2013 Feb;130:382-9. doi: 10.1016/j.biortech.2012.11.127. Epub 2012 Dec 8.

DOI:10.1016/j.biortech.2012.11.127

Abstract

In this study, the effect of nitrite/FNA on the anaerobic metabolism of polyphosphate accumulating organisms (PAOs) and glycogen accumulating organisms (GAOs) is investigated. The results clearly show that FNA has a detrimental effect on the acetate uptake rate by both PAOs and GAOs, but this adverse effect is much stronger on PAOs than on GAOs. Also, when FNA was increased, phosphate release to acetate uptake ratio by PAOs increased substantially (250-300% compared to control), which was accompanied by decreases (40-60%) in glycogen degradation and PHA production to VFA uptake. In contrast, these ratios for GAOs remained constant or increased slightly towards the highest FNA concentration applied. These results indicate that the anaerobic metabolism of PAOs is more adversely affected than that of GAOs when FNA is present. This might provide a competitive advantage to GAOs over PAOs in enhanced biological phosphorus removal systems when nitrite is present.

摘要

在这项研究中，研究了亚硝酸盐/FNA 对聚磷菌（PAOs）和糖原积累菌（GAOs）厌氧代谢的影响。结果清楚地表明，FNA 对 PAOs 和 GAOs 的乙酸盐摄取率都有不利影响，但对 PAOs 的不利影响比 GAOs 强得多。此外，当 FNA 增加时，PAOs 的磷酸盐释放与乙酸盐摄取的比例大幅增加（与对照相比增加了 250-300％），同时糖原降解和 PHB 生产与 VFA 摄取的比例分别下降了（40-60％）。相比之下，对于 GAOs，这些比例在应用的最高 FNA 浓度下保持不变或略有增加。这些结果表明，当存在 FNA 时，PAOs 的厌氧代谢比 GAOs 的厌氧代谢受到更不利的影响。当存在亚硝酸盐时，这可能为 GAOs 在强化生物除磷系统中提供比 PAOs 更具竞争力的优势。