State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, People's Republic of China.
Appl Biochem Biotechnol. 2013 Mar;169(6):1822-36. doi: 10.1007/s12010-013-0105-6. Epub 2013 Jan 24.
The performance and microbial community characteristics of a laboratory scale anaerobic baffled reactor (ABR) with four compartments (C1-C4) treating sugar refinery wastewater were investigated. The COD removal was 94.8 % with a CH4 yield of 0.21 L g(-1) CODremoved at total organic loading rate (OLR) of 5.33 kg COD/m(-3) day(-1). Fermentative bacteria were dominant in C1 and C2, while syntrophic acetogens and methanogens were dominant in C3 and C4. Some acid-tolerant methanogens were enriched in acidogenic phase. The present of the acid-tolerant methanogens could improve the efficiency and stability of the ABR as the most of the methanogens are vulnerable to low pH. In addition, high functional redundancy of the fermentative bacteria implicated that the microbial communities in acidogenic phase were stable functionally and allowed the ABR to balance perturbation. It was also found that syntrophic acetogenesis might be a weakness in the ABR as syntrophic acetogens were poor as compared with fermentative bacteria and methanogens.
采用具有四个隔室（C1-C4）的实验室规模厌氧折流板反应器（ABR）处理糖精炼废水，考察了其运行性能和微生物群落特性。在总有机负荷率（OLR）为 5.33kg COD/m³·天（-1）时，COD 去除率为 94.8%，CH4 产率为 0.21L/g COD去除。发酵细菌在 C1 和 C2 中占优势，而产氢产乙酸菌和产甲烷菌在 C3 和 C4 中占优势。一些耐酸产甲烷菌在产酸相中得到了富集。耐酸产甲烷菌的存在可以提高 ABR 的效率和稳定性，因为大多数产甲烷菌对低 pH 值很敏感。此外，发酵细菌具有较高的功能冗余性，这意味着产酸相中的微生物群落在功能上是稳定的，允许 ABR 平衡扰动。还发现，产氢产乙酸作用可能是 ABR 的一个弱点，因为与发酵细菌和产甲烷菌相比，产氢产乙酸菌的性能较差。
