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A force-based mechanistic model for describing activated sludge settling process

文献类型：期刊论文

作者Xu, Guihua1,2; Yin, Fengjun1; Xu, Yuanjian1; Yu, Han-Qing2
刊名WATER RESEARCH
出版日期2017-12-15
卷号127页码:118-126
关键词Activated sludge Settling process Force-based model Secondary settling tank Solids pressure
ISSN号0043-1354
DOI10.1016/j.watres.2017.10.013
英文摘要Sludge settling as the last step in the biological wastewater treatment process substantially affects the system performance, and thus the design and control optimization of the sludge settling process has been frequently investigated with mathematical modeling tools. So far, these models are developed on the basis of the solid flux theory with numerous parameters and complicated boundary conditions, and their prediction results are often unsatisfactory. In this work, a new force-based mechanical model with five parameters was developed, in which five forces were adopted and Newton's law, rather than the flux theory, was used to describe the sludge settling process. In such a model, the phase interactions were taken into account. New functions of hydrodynamic drag, solids pressure and shear stress were developed. Model validation results demonstrate that both batch and continuous sludge settling processes could be accurately described by this model. The predictions of this model were more accurate than those of flux theory-based models, suggesting its advantages in understanding sludge settling behaviors. In addition, this mechanistic model needed to input 5 parameters and set 1 boundary condition only, and could be directly executed by commercial computational fluid dynamics software. Thus, this force-based model provides a more convenient and useful tool to improve the activated sludge settling design and operation optimization. (C) 2017 Elsevier Ltd. All rights reserved.
资助项目National Natural Science Foundation of China[51538011] ; Natural Science Foundation of Chongqing, China[cstc2014jcyjA20010]
WOS研究方向Engineering ; Environmental Sciences & Ecology ; Water Resources
语种英语
WOS记录号WOS:000418219000013
出版者PERGAMON-ELSEVIER SCIENCE LTD
源URL[http://172.16.51.4:88/handle/2HOD01W0/100]  
专题水污染过程与治理研究中心
通讯作者Yin, Fengjun; Yu, Han-Qing
作者单位1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm, Chongqing 400714, Peoples R China
2.Univ Sci & Technol China, Dept Chem, CAS Key Lab Urban Pollutant Convers, Hefei 230026, Anhui, Peoples R China
推荐引用方式
GB/T 7714		 Xu, Guihua,Yin, Fengjun,Xu, Yuanjian,et al. A force-based mechanistic model for describing activated sludge settling process[J]. WATER RESEARCH,2017,127:118-126.
APA Xu, Guihua,Yin, Fengjun,Xu, Yuanjian,&Yu, Han-Qing.(2017).A force-based mechanistic model for describing activated sludge settling process.WATER RESEARCH,127,118-126.
MLA Xu, Guihua,et al."A force-based mechanistic model for describing activated sludge settling process".WATER RESEARCH 127(2017):118-126.

入库方式： OAI收割

来源：重庆绿色智能技术研究院

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