Sensitivity analysis of autotrophic N removal by a granule based bioreactor: Influence of mass transfer versus microbial kinetics

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• 作者：Anna Katrine Vangsgaard ; Miguel Mauricio-Iglesias ; Krist V. Gernaey ; Barth F. Smets ; G¨¹rkan Sin
• 关键词：Autotrophic nitrogen removal ; Anammox ; Granular sludge ; Uncertainty and sensitivity analysis ; Modeling
• 刊名：Bioresource Technology
• 出版年：2012
• 出版时间：November, 2012
• 年：2012
• 卷：123
• 期：Complete
• 页码：230-241
• 全文大小：1133 K

文摘

A comprehensive and global sensitivity analysis was conducted under a range of operating conditions. The relative importance of mass transfer resistance versus kinetic parameters was studied and found to depend on the operating regime as follows: Operating under the optimal loading ratio of 1.90 (gO₂/m³/d)/(gN/m³/d), the system was influenced by mass transfer (10 % impact on nitrogen removal) and performance was limited by AOB activity (75 % impact on nitrogen removal), while operating above, AnAOB activity was limiting (68 % impact on nitrogen removal). The negative effect of oxygen mass transfer had an impact of 15 % on nitrogen removal. Summarizing such quantitative analyses led to formulation of an optimal operation window, which serves a valuable tool for diagnosis of performance problems and identification of optimal solutions in nitritation/anammox applications.