反硝化聚磷菌富集条件的研究

Study on Enrichment Conditions of Denitrifying Phosphorus Accumulating Bacteria

采用SBR反应器,通过厌氧/好氧、厌氧/缺氧两个阶段的驯化培养来富集反硝化聚磷菌(DPBs),考察了不同条件对DPBs富集情况的影响。在培养驯化过程中应抑制厌氧/好氧阶段聚糖菌的生长以及厌氧/缺氧阶段反硝化菌的繁殖。结果表明,乙酸是DPBs生长的优良碳源;在pH=8.5的条件下,按C/P值为8进水、按N/P值为4在缺氧段添加硝酸钠进行培养驯化可富集大量的DPBs。

In a laboratory-scale sequencing batch reactor （SBR）, denitrifying phosphorus accumulating bacteria （DPBs） were enriched during acclimation in the anaerobic/aerobic and anaerobic/anoxic stages, and the influence of different conditions on the enrichment of DPBs was investigated. The growth of the glycogen accumulating organisms in the anaerobic/aerobic stage and the propagation of denitrifying bacteria in the anaerobic/anoxic stage should be inhibited during the acclimation. The results demonstrate that acetic acid is the best carbon source for the growth of DPBs, the optimal conditions for enrichment of DPBs are that pH value of the wastewater is 8.5, the influent C/P ratio is 8, and sodium nitrate is added into the anoxic stage at N/P ratio of 4.