Sludge Rising and Critical Time Prediction for Denitrification in Secondary Clarifiers: Experimental and Computational Fluid Dynamics Studies
文献类型：期刊论文
| 作者 | Fan, Long1,2; Xiao, Yao1; Liu, Qiao2,3; Xu, Nong2,3; Dong, Qiang2,3; Shi, Hanchang1; Ding, Aiqin2 |
| 刊名 | ENVIRONMENTAL ENGINEERING SCIENCE
 |
| 出版日期 | 2021-06-11 |
| 页码 | 9 |
| 关键词 | computational fluid dynamics (CFD) critical time denitrification lighter sludge sludge rising |
| ISSN号 | 1092-8758 |
| DOI | 10.1089/ees.2021.0163 |
| 英文摘要 | In this study, we investigated the sludge rising process during denitrification, especially its hydrodynamics, with both experiments and computational fluid dynamics (CFD) modeling. The rising process was observed and divided into three stages: bubble-forming, sludge particles rising with isolated bubbles, and sludge blanket rising. A new solid phase denoted as lighter sludge was introduced in the CFD simulation to bridge the gap between the simulation and the reality. We simulated the three-phase (wastewater, normal activated sludge, and lighter sludge) turbulent flow in the secondary clarifier. CFD simulation agreed with the experiments and math-model results. Lighter sludge dominated the effluent quality during the denitrification process. Sludge blanket rising started at scattered points in the bottom hopper. A 30-min window occurred between the rising of the sludge blanket and the worsening of effluent quality, which could be regarded as a critical time to prevent sludge from rising. |
| WOS关键词 | MATHEMATICAL-MODEL ; DESIGN ; FLOW |
| 资助项目 | Key Research and Development Project of Anhui Province, China[201904a05020077] ; Major Program of Anhui Provincial Science and Technology, China[201903a05020044] ; Start-up Fund for Distinguished Scholars in Hefei University[18-19RC15] ; Start-up Fund for Distinguished Scholars in Hefei University[18-19RC16] ; Start-up Fund for Distinguished Scholars in Hefei University[18-19RC19] ; Fund of State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University ; State Key Laboratory of Biochemical Engineering, IPE, CAS |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000660216800001 |
| 出版者 | MARY ANN LIEBERT, INC |
| 资助机构 | Key Research and Development Project of Anhui Province, China ; Major Program of Anhui Provincial Science and Technology, China ; Start-up Fund for Distinguished Scholars in Hefei University ; Fund of State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University ; State Key Laboratory of Biochemical Engineering, IPE, CAS |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/49094]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Xu, Nong; Dong, Qiang |
| 作者单位 | 1.Tsinghua Univ, Environm Sch, State Key Joint Lab Environm Simulat & Pollut Con, Beijing, Peoples R China 2.Hefei Univ, Sch Energy Mat & Chem Engn, Hefei 230601, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, Long,Xiao, Yao,Liu, Qiao,et al. Sludge Rising and Critical Time Prediction for Denitrification in Secondary Clarifiers: Experimental and Computational Fluid Dynamics Studies[J]. ENVIRONMENTAL ENGINEERING SCIENCE,2021:9. |
| APA | Fan, Long.,Xiao, Yao.,Liu, Qiao.,Xu, Nong.,Dong, Qiang.,...&Ding, Aiqin.(2021).Sludge Rising and Critical Time Prediction for Denitrification in Secondary Clarifiers: Experimental and Computational Fluid Dynamics Studies.ENVIRONMENTAL ENGINEERING SCIENCE,9. |
| MLA | Fan, Long,et al."Sludge Rising and Critical Time Prediction for Denitrification in Secondary Clarifiers: Experimental and Computational Fluid Dynamics Studies".ENVIRONMENTAL ENGINEERING SCIENCE (2021):9. |
入库方式： OAI收割
来源：过程工程研究所
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