Division of Materials Science and Chemical Engineering, Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan.
Department of Materials Science and Engineering, Graduate School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan.
Appl Microbiol Biotechnol. 2017 Dec;101(23-24):8607-8619. doi: 10.1007/s00253-017-8571-3. Epub 2017 Oct 24.
Previous studies have shown that enhanced biological phosphorus removal (EBPR) performance under continuous aerobic conditions always eventually deteriorates; however, the speed at which this happens depends on the carbon source supplied. The published data suggest that propionate is a better carbon source than acetate is for maintaining operational stability, although it is not clear why. A lab-scale sequencing batch reactor was run initially under conventional anaerobic/aerobic conditions with either acetate or propionate as the carbon source. Chemical and microbiological analyses revealed that both sources performed as expected for such systems. When continuous aerobic conditions were imposed on both these established communities, marked shifts of the "Candidatus Accumulibacter" clades were recorded for both carbon sources. Here, we discuss whether this shift could explain the prolonged EBPR stability observed with propionate.
先前的研究表明，在连续好氧条件下，强化生物除磷（EBPR）性能最终总是会恶化；然而，这种情况发生的速度取决于所供应的碳源。已发表的数据表明，丙酸盐作为碳源比乙酸盐更有利于维持运行稳定性，尽管尚不清楚原因。在实验室规模的序批式反应器中，最初在传统的厌氧/好氧条件下，以乙酸盐或丙酸盐作为碳源进行运行。化学和微生物学分析表明，这两种来源在这种系统中都表现出预期的效果。当连续好氧条件施加于这两个已建立的群落时，两种碳源的“Candidatus Accumulibacter”菌群都发生了明显的转移。在这里，我们讨论这种转移是否可以解释用丙酸盐观察到的延长的 EBPR 稳定性。
