CFD simulation of mixing in anaerobic digesters

被引：132

作者：

Terashima, Mitsuharu ^{[1
]}

Goel, Rajeev ^{[2
]}

Komatsu, Kazuya ^{[1
]}

Yasui, Hidenari ^{[3
]}

Takahashi, Hiroshi ^{[4
]}

Li, Y. Y. ^{[5
]}

Noike, Tatsuya ^{[6
]}

机构：

[1] Kurita Water Ind Ltd, Nogi, Tochigi 3290105, Japan

[2] Hydromantis Inc, Hamilton, ON L8P 4R5, Canada

[3] Univ Kitakyushu, Fac Environm Engn, Wakamatsu Ku, Kitakyushu, Fukuoka 8080135, Japan

[4] Tohoku Univ, Grad Sch Environm Studies, Aoba Ku, Sendai, Miyagi 9808579, Japan

[5] Tohoku Univ, Dept Civil Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan

[6] Nihon Univ, Adv Res Inst, Chiyoda Ku, Tokyo 1020073, Japan

来源：

BIORESOURCE TECHNOLOGY | 2009年 / 100卷 / 07期

关键词：

Anaerobic digestion; Mixing; CFD; Rheology; FLOW PATTERN VISUALIZATION; RHEOLOGICAL CHARACTERIZATION; SLUDGE; WASTE;

D O I：

10.1016/j.biortech.2008.07.069

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

A three-dimensional CFD model incorporating the theological properties of sludge was developed and applied to quantify mixing in a full-scale anaerobic digester. The results of the model were found to be in good agreement with experimental tracer response curve. In order to predict the dynamics of mixing, a new parameter. UI (uniformity index) was defined. The visual patterns of tracer mixing in simulation were well reflected in the dynamic variation in the value of UI. The developed model and methods were applied to determine the required time for complete mixing in a full-scale digester at different solid concentrations. This information on mixing time is considered to be useful in optimizing the feeding cycles for better digester performance. (C) 2008 Published by Elsevier Ltd.

引用

页码：2228 / 2233

页数：6

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