Abstract:The periodic existence of feast and famine phases induced by cyclic feeding is generally believed to be beneficial to the formation of aerobic granules in SBR system. In order to enhance this feast-famine regime, we run a lab-scale SBR in anaerobic/aerobic mode. There were granular sludge on the 7d after the SBR started up, and on the 30d the granular sludge system was stable. During the initial granulation period, the content of extracellular protein (PN) was 6mg/(g-VSS), which was lower than that of the famine phase(10mg/g-VSS), while it was higher during the granular stabilization period, 13mg/g-VSS and 20mg/g-VSS, respectively. It was interesting to find that the changing trend of extracellular polysaccharides (PS) at the feast and famine period was opposite to that of the PN. And during the whole operation period, the amount of PS was increased from 13mg/g-VSS to 55mg/g-VSS. In addition, it was higher at the end of feast phase than that of the famine phase. That is, the PS and PN play a different role in the granulation process, and PN seems to be more important to the initial granulation stage. Aerobic granulation was initiated by the feast/famine regime in the SBR system.
吴昌永, 周岳溪. 厌氧/好氧运行方式对颗粒污泥形成的影响[J]. 中国环境科学, 2013, 33(7): 1237-1243.
WU Chang-Yong, ZHOU Yue-Xi. Effect of anaerobic/aerobic alternative operating strategy on the formation of granular sludge in a sequencing batch reactor. CHINA ENVIRONMENTAL SCIENCECE, 2013, 33(7): 1237-1243.