Analysis of hydrodynamic characteristics of the counter-flow water distribution layout mode in UASB reactors
YANG Zehao
TIAN Fengguo
WEI Zhiyang
LI Guohua
Abstract：The hydrodynamic characteristics of the upflow anaerobic fermentation tank(UASB)under the counter-flow water distribution mode are numerically simulated to explore the velocity distribution,turbulence intensity and shear rate distribution features under different numbers of inlet pipes.The results show that under the counter-flow water inlet distribution layout mode,there is a large-scale circulating flow in the tank with the center rising and the periphery descending.With the increase in the number of inlet pipes,the flow intensity in the bottom and central areas decreases,but it fails to effectively reduce the proportion of the flow stagnation zone throughout the reactor.However,the uniformity of the distribution of turbulent kinetic energy and shear rate is effectively improved.
Keywords：upflow anaerobic fermentation tankfluid mechanicscounter-flow water distribution mode
Publication Date：2025-07-25
Online Publishing Date：2025-09-15(First online date of this platform, not the publication date of the document)
Pages：4( 76-79 )