甲烷生物转化膜反应器的CFD模拟

Due to the low mass transfer efficiency of methane during fermentation processes, usage of hollow fiber membrane bioreactors is a promising strategy for better bioconversion efficiency of methane. Effects of hollow fiber bundle length and gas velocity on methane bioconversion efficiency were investigated by computational fluid dynamics (CFD) simulation of internal hydrodynamic characteristics. The results indicate that the gas holdup and liquid circulate velocity could be significantly improved by increasing the length of hollow fiber bundle, which could provide an enhanced mass transfer efficiency of gas-liquid. Finally, parameters for the design of this bioreactor including fiber length and gas velocity were obtained from simulation, which provided the best capability for utilizing methane effectively during the cultivation. The results from this study are instructive for the design of bioreactors used for converting methane into bioproducts by methanotrophic bacteria.