Deng Shuang, Wang Luxi, Su Haijia
Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology, Beijing 100029, PR China.
Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology, Beijing 100029, PR China.
J Environ Manage. 2016 May 15;173:49-54. doi: 10.1016/j.jenvman.2016.03.008. Epub 2016 Mar 11.
Due to the important role of the extracellular polymeric substances in the formation of aerobic granular sludge, the variation of the EPS contents in the process of cultivation and that in the one running cycle time were studied in this work. Aerobic granules with diameters between 0.8 and 1.1 mm were obtained within 30-35 days. The results suggested that the increase of EPS contents significantly contributed to the formation of aerobic granules. A linear relationship between the EPS and SVI was also developed, and it revealed that the aerobic granules had good settling property when the EPS exceeded 200 mg/g MLVSS. Two mainly components of EPS, protein (PN) and polysaccharides (PS), could act as the endogenous food for the microbes during the starvation period. The survival of the microbial population was jeopardized when the F/M ration was below 0.5 g COD/g SS d.
由于胞外聚合物在好氧颗粒污泥形成过程中具有重要作用，本研究考察了培养过程及一个运行周期内EPS含量的变化。在30 - 35天内获得了直径为0.8至1.1毫米的好氧颗粒。结果表明，EPS含量的增加显著促进了好氧颗粒的形成。还建立了EPS与SVI之间的线性关系，结果表明当EPS超过200 mg/g MLVSS时，好氧颗粒具有良好的沉降性能。EPS的两个主要成分，蛋白质（PN）和多糖（PS），在饥饿期可作为微生物的内源食物。当F/M比低于0.5 g COD/g SS d时，微生物种群的存活受到威胁。
