期刊
BIOCHEMICAL ENGINEERING JOURNAL
卷 27, 期 1, 页码 45-52出版社
ELSEVIER
DOI: 10.1016/j.bej.2005.06.012
关键词
diffusion; dissolved oxygen; modeling; kinetic parameters; substrate; aerobic granule
In this study, one-dimensional models were developed to simultaneously describe diffusion of substrate and dissolved oxygen in aerobic granule under various conditions in sequencing batch reactor (SBR), meanwhile the models were further applied to predict changes of the bulk substrate concentration in the course of SBR operation. The proposed models were solved numerically by the Numerical Finite Difference Methods without making any additional assumptions. Results showed that diffusions of substrate and dissolved oxygen in aerobic granule would be a dynamic process, and they were closely interrelated. For aerobic granules with a size smaller than 0.4 mm, no diffusion limitation of substrate and dissolved oxygen occurred. However, when aerobic granules grew to a size larger than 0.5 mm, dissolved oxygen became a major limiting factor of metabolic activity of aerobic granule over substrate. These imply that the optimal size of aerobic granule would be less than 0.5 turn in the sense of mass transfer. It was revealed that the substrate removal rate was inversely related to the size of aerobic granules, the substrate removal rate by aerobic granules with a size of 0.5 mm was almost three times of that by aerobic granules with a size of 1 turn. (c) 2005 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据