在20-30℃条件下,对ABR反应器进行了169d5个阶段的启动实验,进水COD容积负荷达到4.38kgCOD·m^-3·d^-1,出水COD,挥发性脂肪酸(VFA)和pH值达到要求;形成了大量的性能良好的颗粒污泥,其尺度介于2—3.8mm之间,沉降速度大于20m·h^-1,MLVSS/MLSS值均大于65%;但各格室厌氧污泥的污泥指数(SVI)差异较大.显微分析表明,不同格室内呈现出种群配合良好的厌氧微生物分布,第一格室存在大量的优势发酵细菌,并有代谢乙酸的丝状甲烷细菌,然后颗粒污泥中的微生物逐渐向以产甲烷细菌优势菌群过渡,并存在许多浮游的原生和后生动物.另外,各格室中的颗粒污泥形状各异,表面凸凹不平。存在气孔,且颗粒污泥愈靠近核心,微生物数量愈少,细菌分泌物和无机质愈多.
This study examined the start-up of anaerobic baffled reactor (ABR) at the temperature of 20-30℃.Through five-stage experiments during 169 days, the volumetric loading rate of the influent reached around 4. 38 kgCOD·m^-3·d^-1, and with suitable values of the effluent COD , volatile fatty acid (VFA)and pH.Abundant granular sludge with good characteristics were existed in the reactor, such as granular size 2- 3.8mm, more than 20m·h^-1 of settling velocities and MLVSS/MLSS above 65%. However, different SVI values were found in each compartment. The microscopic analysis results showed that cooperative anaerobic microbial communities distributed within different compartments. The dominant bacteria in the compartment one were zymogen, and much filamentous Methanogenic bacteria that can absorb acetic acid were also observed. Towards the ends of the reactor, the dominant bacterial populations shifted stepwise to Methanogenic bacteria in granular sludge, and appearing lots of protozoan and metazoan. As to single granular sludge with different shape, the air holes were in its uneven surface. The fewer microbes were found in the core of the granular than on the surface, while the bacteria secretion and inorganic compounds appeared oppositely.