Numerical simulation analysis of flow characteristics of suspended packing in biological contact oxidation tank

doi:10.11949/j.issn.0438-1157.20171511

CIESC Journal ›› 2018, Vol. 69 ›› Issue (7): 3242-3248.DOI: 10.11949/j.issn.0438-1157.20171511

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Numerical simulation analysis of flow characteristics of suspended packing in biological contact oxidation tank

WU Yun^1,2, DU Xiaolei^1,2, SONG Kai³, LIU Hongyu^1,2, WANG Jie^1,2, WANG Erpo⁴

1 State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China;
2 School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China;
3 Tianjin Moor Lake Investment Development Co. Ltd., Tianjin 300381, China;
4 Tianjin KCO Green Technology Development Co., Ltd., Tianjin 300450, China

Received:2017-11-12 Revised:2017-12-27 Online:2018-07-05 Published:2018-07-05
Supported by:
supported by the National Natural Science Foundation of China(51678410), the China Postdoctoral Science Foundation (2015M571267), the Tianjin Science and Technology Project (16PTGCCX00070) and the Tianjin Construction Committee Science and Technology Projects(2016-19).

生物接触氧化池悬浮填料流动特性数值模拟分析

吴云^1,2, 杜小磊^1,2, 宋凯³, 刘宏宇^1,2, 王捷^1,2, 王二坡⁴

1 天津工业大学省部共建分离膜与膜过程国家重点实验室, 天津 300387;
2 天津工业大学环境与化学工程学院, 天津 300387;
3 天津市团泊湖投资发展有限公司, 天津 300381;
4 天津康科绿特科技发展有限公司, 天津 300450

通讯作者: 吴云, 刘宏宇
基金资助:
国家自然科学基金面上项目（51678410）；中国博士后科学基金（2015M571267）；天津市科技计划项目（16PTGCCX00070）；天津市建委科技项目（2016-19）。

Abstract

Abstract:

A model was developed to simulate the flow properties of suspended packing materials in the biological contact oxidation tank according to the FLUENT multi-phase flow modeling. The distribution of suspended packing materials was improved by optimizing the oxidation tank structure and aeration intensity distribution. The results indicated that the ratio of length to width and aeration intensity distribution played the key role in uniform mixing of the packing materials in the oxidation tank. The tank was divided into four subsections using separation wall, which reduced the ratio of length to width from 7.1 to 1.8. Subsequently, instead of accumulating at the end zone of the oxidation tank, the biological packing materials could be evenly distributed in four subsections. When water body flew through the overflow hole, the flow rate instantaneously increased due to the narrowing cross section area. The water body at high flow rate collided with that at low flow rate at the surrounding area, resulting in the formation of huge vortex flow field. Thus, it mixed consistently the packing materials and enhanced the dispersion effect of the materials. However, the intersection between the separation wall and side wall of the oxidation tank was subjected to the formation of dead zone. It could be resolved by redistributing the aeration intensity of the subsections. The results suggested that uneven aeration could obviously optimize the flow field, which eliminated the accumulation of the packing materials at the side wall and end zone.

Key words: biological contact oxidation pond, suspended packing, numerical simulation, aeration, multiphase flow

摘要：

采用FLUENT多相流模型对生物接触氧化池悬浮生物填料流动特性进行数值模拟，分析了改变氧化池长宽比及调整曝气强度分布对改善填料分布状态的可行性。研究表明，通过添加隔墙将曝气池分成4个区后，分区内形成较明显涡流流场，改善了悬浮填料的空间分布均匀性；通过对分区内曝气强度分布进行优化，悬浮填料在氧化池内的混合状态得到进一步改善，氧化池末端和边壁不再发生填料团聚现象。因此，合理设计反应池的长宽比及优化曝气强度分布对悬浮生物填料能否在氧化池内混合均匀起到关键作用。

关键词: 生物接触氧化池, 悬浮填料, 数值模拟, 曝气, 多相流

CLC Number:

WU Yun, DU Xiaolei, SONG Kai, LIU Hongyu, WANG Jie, WANG Erpo. Numerical simulation analysis of flow characteristics of suspended packing in biological contact oxidation tank[J]. CIESC Journal, 2018, 69(7): 3242-3248.

吴云, 杜小磊, 宋凯, 刘宏宇, 王捷, 王二坡. 生物接触氧化池悬浮填料流动特性数值模拟分析[J]. 化工学报, 2018, 69(7): 3242-3248.

References 31

[1]	AHMET A, BILGEHAN N, ALI B, et al. Application of sequencing batch biofilm reactor for treatment of sewage wastewater treatment:effect of power failure[J]. Desalination and Water Treatment, 2014, 52(37/38/39):6956-6965.
[2]	张静. 生物接触氧化池曝气池设计方法的探讨[J]. 工业用水与废水, 2014, 45(6):47-50. ZHANG J. Discussion on the design method of biological contact oxidation pond[J]. Industrial Water and Wastewater, 2014, 45(6):47-50.
[3]	张磊, 郎建峰, 牛姗姗. 生物膜法在污水处理中的研究进展[J]. 水科学与工程技术, 2010, (5):38-41. ZHANG L, LANG J F, NIU S S. Research progress of biofilm process in wastewater treatment[J]. Water Science and Engineering Technology, 2010, (5):38-41.
[4]	王圣武, 马兆昆. 生物膜污水处理技术和生物膜载体[J]. 江苏化工, 2004, (4):36-38. WANG S W, MA Z K. Biofilm wastewater treatment technology and biofilm carrier[J]. Jiangsu Chemical Industry, 2004, (4):36-38.
[5]	MUTHIAH P, PONNUSAMY K, RADHAKRISHANA T K. CFD modeling of flow pattern and phase holdup of three phase fluidized bed contactor[J]. Chemical Product and Process Modeling, 2011, 4(1):3961-3970.
[6]	MIURA H, KAWASE Y. Hydrodynamics and mass transfer in threephase fluidized beds with non-Newtonian fluids[J]. Chemical Engineering Science, 1997, 52(21/22):4095-4104.
[7]	YANG N, WANG W, GE W, et al. Modeling of meso-scale structures in particle-fluid systems:the EMMS/CFD approach[J]. China Particuology, 2005, 3(1):78-79.
[8]	WANG X Y, JIANG F, XU X, et al. Experiment and CFD simulation of gas-solid flow in the riser of dense fluidized bed at high gas velocity[J]. Powder Technology, 2009, 199(3):203-212.
[9]	ANDREWS G. Fluidized-bed bioreactors[J]. Biotechnology and Genetic Engineering Reviews, 1988, 6(1):151-178.
[10]	JIN Y, ZHU J X, WANG Z W, et al. Fluidization Engineering Principles[M]. Beijing:Tsinghua University Press, 2001.
[11]	PANNEERSELVAM R, SAVITHRI S, SURENDER G D. CFD simulation of hydrodynamics of gas-liquid-solid fluidised bed reactor[J]. Chemical Engineering Science, 2009, 64(6):1119-1135.
[12]	PANNEERSELVAM R, SAVITHRI S, SURENDER G D. CFD modeling of gas-liquid-solid mechanically agitated contactor[J]. Chemical Engineering Research and Design, 2008, 86(12):1331-1344.
[13]	BALTUSSEN M W, SEELEN L J H, KUIPERS J A M, et al. Direct numerical simulations of gas-liquid-solid three phase flows[J]. Chemical Engineering Science, 2013, 100:293-299.
[14]	HERMANOWICZ S W, CHENG Y W. Biological fluidized bed reactor:hydrodynamics, biomass distribution and performance[J]. Water Science & Technology, 1990, 22(1/2):193-202.
[15]	许龙. 关于悬浮填料生物接触氧化池设计的探讨[J]. 中国给水排水, 2015, 31(24):1-4. XU L. Discussion on the design of biological contact oxidation tank with suspended carrier[J]. China Water Supply and Sewerage, 2015, 31(24):1-4.
[16]	张鸣远. 高等工程流体力学[M]. 北京:高等教育出版社, 2010:331-344. ZHANG M Y. Advanced Engineering Fluid Mechanics[M]. Beijing:Higher Education Press, 2010:331-344.
[17]	张德良. 计算流体力学教程[M]. 北京:高等教育出版社, 2010:17-54. ZHANG D L. Tutorial of Computational Fluid Dynamics[M]. Beijing:Higher Education Press, 2010:17-54.
[18]	DO-QOANG Z. Computational fluid dynamics applied to water and wastewater treatment facility modeling[J]. Environmental Engineering and Policy, 1998, 1(3):137-147.
[19]	江帆, 黄鹏. FLUENT高级应用与案例分析[M]. 北京:清华大学出版社, 2008:140-182. JIANG F, HUANG P. FLUENT Advanced Applications and Case Studies[M]. Beijing:Tsinghua University Press, 2008:140-182.
[20]	DEEN N G, ANNALAND M S, KUIPERS J. Direct numerical simulation of complex multi-fluid flows using a combined front tracking and immersed boundary method[J]. Chemical Engineering Science, 2009, 64(9):2186-2201.
[21]	蒋宏, 刘春雨. 气-液-固三相流数值模拟研究进展[J]. 广东化工, 2017, 44(3):91-92+112. JIANG H, LIU C Y. Progress in numerical simulation of gas liquid solid three-phase flow[J]. Guangdong Chemical Industry, 2017, 44(3):91-92+112.
[22]	李向阳, 杨士芳, 冯鑫, 等. 气-液-固三相搅拌槽反应器模型及模拟研究进展[J]. 化学反应工程与工艺, 2014, 30(3):238-246. LI X Y, YANG S F, FENG X, et al. Gas liquid solid stirred tank reactor model and simulation research progress[J]. Chemical Reaction Engineering and Technology, 2014, 30(3):238-246.
[23]	董宏伟. 生物膜法在市政污水处理中的应用[J]. 黑龙江科技信息, 2015, (17):77. DONG H W. Application of biofilm process in municipal wastewater treatment[J]. Heilongjiang Science and Technology Information, 2015, (17):77.
[24]	刘广立, 种云霄, 樊青娟, 等. 氧化沟水力特性对处理效果和能耗的影响[J]. 环境科学, 2006, 27(11):2323-2326. LIU G L, CHONG Y X, FAN Q J, et al. Effects of hydraulic characteristics of oxidation ditch on treatment efficiency and energy consumption[J]. Environmental Science, 2006, 27(11):2323-2326.
[25]	REBECCA M, JOANNE Q, TOM S. The effects of media size on the performance of biological aerated filters[J]. Water Research, 2001, 35(10):2514-2522.
[26]	环境保护部. 生物接触氧化法污水处理工程技术规范:HJ 2009-2011[S]. 北京:中国环境科学出版社, 2011. Environmental Protection Department. Technical specification for wastewater treatment engineering by biological contact oxidation process:HJ 2009-2011[S]. Beijing:China Environmental Science Press, 2011.
[27]	AMIRI T Y, MOGHADDAS J S. A jet mixing study in two phase gasliquid systems[J]. Chemical Engineering Research and Design, 2010, 89(3):352-366.
[28]	ROSSO D, STENSTROM M K. Surfactant effects on α-factors in aeration systems[J]. Water Research, 2006, 40(7):1397-1404.
[29]	黄本胜. 生物接触氧化源水预处理工程的水流阻力试验研究[C]//中国水利学会2002学术年会论文集. 中国水利学会, 2002. HUANG B S. Experimental study on flow resistance of biological contact oxidation source water pretreatment project[C]//Proceedings of the 2002 Annual Conference of China Society of Water Conservancy. China Society of Water Conservancy, 2002.
[30]	DONG S R, HYOSEOP W. Hydraulic resistance of some selected vegetation in open channel flows[J]. River Research and Applications, 2008, 24(5):2758-2761.
[31]	ZHENG S H, MU J G, LI J. Experimental study on the frictional resistance of gas-liquid two-phase flow in vertical helically coiled pipe[J]. Applied Mechanics and Materials, 2012, 1503(130):673-687.

Numerical simulation analysis of flow characteristics of suspended packing in biological contact oxidation tank

生物接触氧化池悬浮填料流动特性数值模拟分析

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