Lattice Boltzmann Simulation of Flow and Mass Transfer in Membrane Bioreactor

doi:10.19596/j.cnki.1001-246x.7732

Abstract

Abstract: Effect of biofilm structure on bioreaction as well as flow and mass transfer are investigated with lattice Boltzmann method (LBM) on meso-scale. Porous construction of biofilm is regenerated by Quartet Structure Generation Set (QSGS) method, and LB method is coupled with multi-block model to obtain detail information and save computational cost. It indicates that properly increasing porosity benefits mass transportation between main region and biofilm, and hence improve substrate consumption efficiency under condition of stable biofilm structure. At given porosity of biofilm, changing growth construction of biofilm can also promote mass transfer between inner and outer of biofilm, leading to higher substrate consumption efficiency.

Key words: biofilm, porous media, bioreaction, numerical regeneration

CLC Number:

TK91

YANG Yanxia, LI Jing. Lattice Boltzmann Simulation of Flow and Mass Transfer in Membrane Bioreactor[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2018, 35(5): 571-576.

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