基于LBM-DEM耦合研究多孔介质中生物膜对悬浮粒子运移的影响

洪逸群; 陈丽萍; 龚延风; 薛芳玲; 周彦杰; 王世林

doi:DOI:10.13205/j.hjgc.202207015

基于LBM-DEM耦合研究多孔介质中生物膜对悬浮粒子运移的影响

doi: DOI:10.13205/j.hjgc.202207015

1. 南京工业大学城市建设学院, 南京 211816;
2. 盐城工业职业技术学院, 江苏盐城 224055

详细信息

作者简介:
洪逸群(1997-),男,硕士研究生,主要研究方向为地下水回灌生物-颗粒复合堵塞。yiqunhong@163.com

通讯作者:
陈丽萍,女,教授,博士,主要研究方向为地下水回灌堵塞。clpjoy@njtech.edu.cn

计量
- 文章访问数: 139
- HTML全文浏览量: 23
- PDF下载量: 3
- 被引次数: 0
出版历程
- 收稿日期: 2021-08-10
- 网络出版日期: 2022-09-02

EFFECT OF BIOFILM ON SUSPENDED PARTICLES TRANSPORT IN POROUS MEDIA BASED ON LBM-DEM COUPLING

1. College of Urban Construction, Nanjing Tech University, Nanjing 211816, China;
2. Yancheng Polytechnic College, Yancheng 224055, China

摘要

摘要: 生物膜是多孔介质中普遍存在的细菌群落,会与悬浮粒子相互作用并影响粒子的迁移沉积。采用格子玻尔兹曼-离散单元耦合方法(LBM-DEM)研究了悬浮粒子在覆盖生物膜多孔介质中的运移。发现生物膜的存在会降低孔喉尺寸和DLVO排斥势垒,这有助于增强悬浮粒子的沉积。进出口压差是影响粒子滞留率的主要因素,低进出口压差下粒子无法突破排斥能垒,高压差下流体力通过改变粒子的沉积位置可提高渗透率。溶液离子强度变化主要影响排斥屏障。高离子强度的溶液中,粒子滞留率对压差变化响应较小;低离子强度溶液中,粒子滞留率受进出口压差的影响较大。此外,从介观角度观察入流速度对悬浮粒子黏附与滚动的影响,发现粒子的初始沉积点与来流方向的角度随着粒子速度的增加而减小。
- 生物膜 /
- 多孔介质 /
- 粒子沉积 /
- 格子玻尔兹曼方法 /
- 离散元法
Abstract: Biofilm is a common bacterial community in porous media,which can interact with suspended particles and affect the migration and deposition of particles.The Lattice Boltzmann-discrete element coupling method (LBM-DEM) was used to study the migration of suspended particles in porous media covered with biofilm.The presence of biofilms reduced the pore-throat size and the DLVO repulsive barrier,which helped enhance the deposition of suspended particles.The pressure difference between inlet and outlet was the main factor affecting the retention rate of particles.Under low-pressure difference between inlet and outlet,particles couldn't break through the exclusion barrier,and the flow force of high-pressure difference could increase the permeability by changing the deposition position of the particles.The change of ion concentration in the solution mainly affected the exclusion barrier.In the solution with high ion concentration,the particle retention rate had little response to the change of pressure difference.In the solution with low ion concentration,the particle retention was greatly affected by the inlet and outlet pressure difference.In addition,the effects of inflow velocity on the adhesion and rolling of suspended particles were also observed from a mesoscopic perspective.The angle between the initial deposition points of particles and the incoming flow direction decreased with the increase of particle velocity.
- biofilm /
- porous media /
- particle deposition /
- Lattice Boltzmann method /
- discrete element method

HTML全文

参考文献(18)

[1]	KOTTSOVA A K, YEGANE M, TCHISTIAKOV A A, et al. Effect of electrostatic interaction on the retention and remobilizationof colloidal particles in porous media[J]. Colloids and Surfaces A Physicochemical Engineering Aspects, 2021, 617(13):126371.
[2]	黄修东,束龙仓,崔峻岭,等.人工回灌物理堵塞特征试验及渗滤经验公式推导[J].吉林大学学报, 2014, 44(6):1966-1972.
[3]	PRIYANK J, FATHIYA A H, ATEKWANA E A, et al. Mechanistic models of biofilm growth in porous media[J]. Journal of Geophysical Research Biogeosciences, 2015, 119(7):1418-1431.
[4]	CARREL M, MORALES V L, BELTRAN M A, et al. Biofilms in 3D porous media:delineating the influence of the pore network geometry, flow and mass transfer on biofilm development[J]. Water Research, 2018, 134(5):280-291.
[5]	HE L, RONG H F, WU D, et al. Influence of biofilm on the transport and deposition behaviors of nano-and micro-plastic particles in quartz sand[J]. Water Research, 2020, 178:115808.
[6]	JIANG X J, WANG X T, TONG M P, et al. Initial transport and retention behaviors of ZnO nanoparticles in quartz sand porous media coated with Escherichia coli biofilm[J]. Environmental Pollution, 2013, 174(3):38-49.
[7]	ZHOU K, HOU J, SUN Q C, et al. Study on the flow resistance of the dispersion system of deformable preformed particle gel in porous media using LBM-DEM-IMB method[J]. Journal of Dispersion Science Technology, 2019, 40(10/11/12):1523-1530.
[8]	BENIOUG M, GOLFIER F, OLTEAN C, et al. An immersed boundary-lattice Boltzmann model for biofilm growth in porous media[J]. Advances in Water Resources, 2017, 107:65-82.
[9]	LI Q J, PRIGIOBBE V. Numerical simulations of the migration of fine particles through porous media[J]. Transport in Porous Media, 2018, 122(3):745-759.
[10]	CROWE C T, SCHWARZKOPF J D, SOMMERFELD M, et al. Multiphase flows with droplets and particles:CRC press[M]. Taylor&Francis Group, 2011.
[11]	BRILLIANTOV N V, P. SCHEL T. Rolling friction of a viscous sphere on a hard plane[J]. Europhysics Letters, 1998, 42(5):511-516.
[12]	LIANG Y C, HILAL N, LANGSTON P, et al. Interaction forces between colloidal particles in liquid:theory and experiment[J]. Advances in Colloid and Interface Science, 2007, 134/135:151-166.
[13]	TORKZABAN S, BRADFORD S A. Critical role of surface roughness on colloid retention and release in porous media[J]. Water Research, 2016, 88:274-284.
[14]	NOBLE D R, TORCZYNSKI J R. A lattice-boltzmann method for partially saturated computational cells[J]. International Journal of Modern Physics C, 1998, 9(8):1189-1201.
[15]	ZHOU Y J, CHEN L P, GONG Y F, et al. Pore-scale simulations of particles migration and deposition in porous media using LBM-DEM coupling method[J]. Processes, 2021, 9(3):465.
[16]	MITZEL M R, SAND S, WHALEN J K, et al. Hydrophobicity of biofilm coatings influences the transport dynamics of polystyrene nanoparticles in biofilm-coated sand[J]. Water Research, 2016, 92:113-120.
[17]	JIN C, ZHAO W G, NORMANI S D, et al. Synergies of media surface roughness and ionic strength on particle deposition during filtration[J]. Water Research, 2017, 114:286-295.
[18]	YANG M M, LI S Q, YAO Q. Mechanistic studies of initial deposition of fine adhesive particles on a fiber using discrete-element methods[J]. Powder Technology, 2013, 248:44-53.