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Volume 41 Issue 4
Apr.  2023
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Article Navigation >  ENVIRONMENTAL ENGINEERING  > 2023  >  41(4): 49-54,153
FU Xiaoyan, LI Zhenguo, LI Xiangyu, YANG Meng, LIU Lianlian, XIA Ying, SUN Zhen, LI Zhiyuan. ANTIBIOTIC POLLUTION CHARACTERISTICS AND ECOLOGICAL RISK ASSESSMENT OF WATER BODIES AROUND LIVESTOCK AND POULTRY BREEDING IN DALIAN[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(4): 164-169. doi: 10.13205/j.hjgc.202304023
Citation: YANG Yong, CHEN Liping, GONG Yanfeng, JIN Chunming, WANG Shilin. EFFECT OF MICROBIAL GROWTH ON PERMEABILITY OF POROUS MEDIA BASED ON MULTI-SCALE METHOD[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(4): 49-54,153. doi: 10.13205/j.hjgc.202304007
shu

EFFECT OF MICROBIAL GROWTH ON PERMEABILITY OF POROUS MEDIA BASED ON MULTI-SCALE METHOD

doi: 10.13205/j.hjgc.202304007

  • College of Urban Construction, Nanjing Tech University, Nanjing 211816, China

  • Received Date: 2022-04-16
    Available Online: 2023-05-26
  • Publish Date: 2023-04-01
    Abstract
  • In this paper, a coupling algorithm of microbial growth at pore scale and reduction of permeability at REV-scale was proposed, to analyze the effect law of microbial growth on the reduction of permeability, in order to provide a theoretical basis for effective controlling of microbial clogging in groundwater recharge. About the multi-scale coupled model: in pore-scale, the LBM-IBM coupled model were used to simulate the flow field in porous media, and the CA model was used to simulate microbial growth. A generalized seepage model was used to describe the fluid flow in the porous medium at the macroscopic scale. This study found that heterogeneity in microbial growth was significant in space due to preferential seepage of water and nutrients. The growth rate of microorganisms was the fastest at the inlet of the porous medium. The growth of microorganisms on the porous medium skeleton far from the inlet had little relationship with the upstream and downstream positions, but was directly related to the dominant flow. The dynamic change curve of local equivalent porosity with the different inlet concentrations of nutrients was used in REV calculations. In the results, the clogging in porous media occurs earlier by 18.0% to 30.7%, when the inlet concentration of nutrients doubles.
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