Simulation of liquid-gas flow in full-scale Caroussel oxidation ditch with surface aeration

被引：3

作者：

Li Zhen-liang ^{[1
,2
]}

Guo Li-sha ^{[3
]}

Zhang Dai-jun ^{[1
,4
]}

Xu Dan-yu ^{[5
]}

机构：

[1] Chongqing Univ, Dept Environm Sci, Chongqing 400030, Peoples R China

[2] Chongqing Educ Coll, Chongqing 400067, Peoples R China

[3] Univ Laval, Dept Civil Engn, Quebec City, PQ G1V 0A6, Canada

[4] Chongqing Univ, Key Lab Resources Exploitat & Environm Disaster C, Minist Educ, Chongqing 400030, Peoples R China

[5] Tianjin Acad Environm Sci, Tianjin 300191, Peoples R China

来源：

JOURNAL OF CENTRAL SOUTH UNIVERSITY | 2012年 / 19卷 / 06期

关键词：

liquid-gas flow; computational fluid dynamics technique; oxidation ditch; surface free movement; gas volume fraction; OXYGEN-TRANSFER; RISE VELOCITY; BUBBLES; COLUMN; SWARM;

D O I：

10.1007/s11771-012-1184-1

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A model for liquid-gas flow (MLGF), considering the free movement of liquid surface, was built to simulate the wastewater velocity field and gas distribution in a full-scale Caroussel oxidation ditch with surface aeration. It was calibrated and validated by field measurement data, and the calibrated parameters and sections were selected based on both model analysis and numerical computation. The simulated velocities of MLGF were compared to that of a model for wastewater-sludge flow (MWSF). The results show that the free liquid surface considered in MLGF improves the simulated velocity results of upper layer and surface. Moreover, distribution of gas volume fraction (GVF) simulated by MLGF was compared to dissolved oxygen (DO) measured in the oxidation ditch. It is shown that DO distribution is affected by many factors besides GVF distribution.

引用

页码：1615 / 1621

页数：7

共 14 条

[1] Global and local mass transfer coefficients in waste water treatment process by computational fluid dynamics [J].

Cockx, A ;

Do-Quang, Z ;

Audic, JM ;

Liné, A ;

Roustan, M .

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION, 2001, 40 (02) :187-194

[2] Oxygen transfer prediction in aeration tanks using CFD [J].

Fayolle, Yannick ;

Cockx, Arnaud ;

Gillot, Sylvie ;

Roustan, Michel ;

Heduit, Alain .

CHEMICAL ENGINEERING SCIENCE, 2007, 62 (24) :7163-7171

[3]

FLUENT INCORPORATED, 2003, FLUENT 6 1 US GUID, P231

[4]

Guo L, 2010, WASTEWATER SLUDGE 2

[5] An experimental study of low concentration sludge settling velocity under turbulent condition [J].

Guo, Lisha ;

Zhang, Daijun ;

Xu, Danyu ;

Chen, Yuan .

WATER RESEARCH, 2009, 43 (09) :2383-2390

[6] Rise velocity of a swarm of large gas bubbles in liquids [J].

Krishna, R ;

Urseanu, MI ;

van Baten, JM ;

Ellenberger, J .

CHEMICAL ENGINEERING SCIENCE, 1999, 54 (02) :171-183

[7] Flow field and residence time distribution simulation of a cross-flow gas-liquid wastewater treatment reactor using CFD [J].

Le Moullec, Yann ;

Potier, Olivier ;

Gentric, Caroline ;

Leclerc, Jean Pierre .

CHEMICAL ENGINEERING SCIENCE, 2008, 63 (09) :2436-2449

[8] Numerical simulation of multiphase flow in bubble column reactors. Influence of bubble coalescence and break-up [J].

Olmos, E ;

Gentric, C ;

Vial, C ;

Wild, G ;

Midoux, N .

CHEMICAL ENGINEERING SCIENCE, 2001, 56 (21-22) :6359-6365

[9] The terminal rise velocity of 10-100 μm diameter bubbles in water [J].

Parkinson, Luke ;

Sedev, Rossen ;

Fornasiero, Daniel ;

Ralston, John .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2008, 322 (01) :168-172

[10] Experimental determination of the drag coefficient in a swarm of bubbles [J].

Simonnet, M. ;

Gentric, C. ;

Olmos, E. ;

Midoux, N. .

CHEMICAL ENGINEERING SCIENCE, 2007, 62 (03) :858-866

← 1 2 →