Key Laboratory of Marine Environment and Ecology (Ocean University of China), Ministry of Education, Qingdao 266100, China.
Bioresour Technol. 2010 May;101(9):2952-9. doi: 10.1016/j.biortech.2009.11.098. Epub 2010 Jan 6.
The effect of different carbon sources on the starting-up duration of sulfidogenic bioreactor and corresponding bacterial communities were investigated. The bioreactor starting-up duration was closely dependent on the complexity and availability of the carbon sources. 16S rRNA gene diversity of climax bacterial communities developed in each bioreactor had an increasing tendency for the carbon resource of lactate, acetate/ethanol, glucose and molasses. At the steady stage of bioreactors, the molasses-fed bacterial community pattern grouped with that of glucose-fed and acetate/ethanol-fed grouped with that of lactate-fed, both of which separated each other and departed further from the seed sludge. The present study concludes that utilization of simple carbon sources that are readily utilized by sulfate-reducing bacteria (SRB) can not only increase the fraction of SRB and thus improve sulfate removal efficiency, but also shorten the starting-up duration.
考察了不同碳源对硫化物生物反应器启动时间及其相关细菌群落的影响。生物反应器的启动时间与碳源的复杂性和可用性密切相关。在每个生物反应器中，处于顶极状态的细菌群落的 16S rRNA 基因多样性随乳酸盐、乙酸盐/乙醇、葡萄糖和糖蜜等碳源的增加而增加。在生物反应器的稳定阶段，糖蜜喂养的细菌群落模式与葡萄糖喂养的细菌群落模式和乙酸盐/乙醇喂养的细菌群落模式聚类，它们彼此分离，与接种污泥的距离更远。本研究得出结论，利用易于硫酸盐还原菌（SRB）利用的简单碳源不仅可以增加 SRB 的比例，从而提高硫酸盐去除效率，还可以缩短启动时间。
