MESOSCOPIC ANALYSIS ON MICROBIAL GROWTH AND DECAY PROCESS IN POROUS MEDIA

MA Suning; CHEN Liping; GONG Yanfeng; WANG Shilin

doi:10.13205/j.hjgc.202206020

Volume 40 Issue 6

Sep. 2022

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MA Suning, CHEN Liping, GONG Yanfeng, WANG Shilin. MESOSCOPIC ANALYSIS ON MICROBIAL GROWTH AND DECAY PROCESS IN POROUS MEDIA[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(6): 154-161. doi: 10.13205/j.hjgc.202206020

Citation:

MA Suning, CHEN Liping, GONG Yanfeng, WANG Shilin. MESOSCOPIC ANALYSIS ON MICROBIAL GROWTH AND DECAY PROCESS IN POROUS MEDIA[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(6): 154-161. doi: 10.13205/j.hjgc.202206020

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MESOSCOPIC ANALYSIS ON MICROBIAL GROWTH AND DECAY PROCESS IN POROUS MEDIA

doi: 10.13205/j.hjgc.202206020

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

Received Date: 2021-11-14
Available Online: 2022-09-01
Publish Date: 2022-09-01

Abstract

Abstract

In this paper,the LBM-IBM coupling method was used to simulate the flow field in porous media,and the cellular automata model was used to simulate the growth and decay process of microorganisms on the surface of porous media,to reveal the dynamic development process of biological blockage and the essence of the permeability change caused by the blockage in porous media at the mesoscopic level.The study found that when the inlet concentration of nutrients increased by 100%,the relative permeability coefficient attenuation increased by 6.25%~45.5% within 30 hours.There was a critical moment of blockage in biological plugging,and the critical moment of blockage in porous media biofilm was advanced with the increase of nutrient inlet concentration.Under different conditions,the permeability of porous media showed a decreasing trend in different degrees,and the spatial distribution of biological blockage in porous media showed obvious heterogeneity.The growth of organisms was concentration-oriented,and the growth and decay behavior of microorganisms in local pores determined the plugging degree of porous media,but the decline of some organisms didn't change the declining trend of the overall permeability of porous media.When the temperature rose by 25%,the relative permeability coefficient of porous media attenuation could increase by more than 5 times.The sensitivity of biological plugs to temperature was different in different locations.
- biological blockage,
- Lattice Boltzmann method,
- penetrating quality,
- porous media

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References(20)

References

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