Dynamic behavior and concentration distribution of granular sludge in a super-high-rate spiral anaerobic bioreactor

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• 作者：Xiao-Guang Chen^a ; ^b ; ^{cxg@dhu.edu.cn} ; ^{pzheng@zju.edu.cn} ; Ping Zheng^b ; ; Mahmood Qaisar^c ; Chong-Jian Tang^b
• 关键词：Super-high-rate ; Spiral anaerobic bioreactor ; Dynamic behavior ; Concentration distribution ; Sensitivity analyzes
• 刊名：Bioresource Technology
• 出版年：2012
• 期刊代码：11_09608524
• 类别：ce
• 出版时间：May, 2012
• 卷：111
• 期：Complete
• 页码：134-140
• 文件大小：998 K

摘要

Dynamic behavior and concentration distribution of granular sludge is highly dependent on the ecological environment of microbial communities and substrate degradation efficiency along bed height. Both were modeled and verified through experiments in a super-high-rate spiral anaerobic bioreactor (SSAB). The sludge transport efficiency of upmoving biogas (k_t,_n鈭?) displaying dynamic behavior of granular sludge in SSAB were predicted and found to be much lesser than of upflow anaerobic sludge blanket (UASB). The bed concentration distribution (C_m,_n鈭?/C_m,_n) which represented concentration distribution of granular sludge were also quantitatively predicted in two feeding strategies. Parametric sensitivity suggested that k_t,_n鈭? was significantly influenced by spiral angle, outer radii of spiral rectangular channel, settling velocity of granular sludge and superficial liquid velocity (v_l), while C_m,_n鈭?/C_m,_n was affected by v_l and superficial biogas velocity. In addition, some measures were also suggested to optimize designs and operations of such bioreactors.