Abstract: An industrial odor removal system using effective microorganisms (EM) requires sufficient oxygen supply for their appropriate growth and work efficiency. A two-phase bubbly flow mixing inside 3D odor remover was investigated numerically to predict dissolution characteristics of odor gases (i.e., oxygen, carbon dioxide, ammonia, and methane gas etc.) into the working fluid. Three different geometric inner structure designs of odor removal systems were considered to evaluate their effects on the bubble-induced turbulence and concentration variation of oxygen gas dissolved in the water. Several cantilever-typed porous baffle plates were installed at the side wall region of the remover basin to enhance gas dissolution and absorption time. As an additional geometric design, we installed a rotating cylindrical drum with dozens of disk-fins at the upper regime of basin to improve chances of impurity precipitation on the disk surface. Various gas mass fluxes were used to determine their effect on the gas volume fraction, concentration and turbulent viscosity in the water.

Keywords: Odor removal system, bubbly flow, dissolution, porous baffle, gas mass flux

Acknowledgements: This work was supported by the National Research Foundation (NRF) of Korea grant funded by the Korean government (MEST) (No. 2012R1A2A2A01046099), and followings were results of a study on the Leaders INdustry-university Cooperation Project supported by the Ministry of Education, Science and Technology (MEST).

Cheol Woo Park

Affiliation

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Numerical analysis of two-phase bubbly flow in an industrial odor remover employing effective microorganisms solution