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bubble hydrodynamics. A specific approach was proposed for estimating the mass transfer coefficient in such a configuration. It was found that the mass transfer coefficient kL depended on bubble behavior through the packing. Low porosity of packing, bubble size and velocity were the principal parameters influencing the hydrodynamics and mass transfer coefficients at this scale.This study considered a new approach to obtain precise data on biofilter systems, investigate the hydrodynamics and gas-liquid mass transfer at two scales, enriching the database on biofilters and providing new insights that could improve this system in industry.

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