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Abstract

Effects of a conventional three-dimensional elastic packing (TDEP) carrier on oxygen mass transfer (OMT) efficiency in clean water were evaluated and a novel OMT model in the presence of plastic carriers in wastewater treatment was proposed. Results showed that OMT efficiency was increased in the presence of TDEP carriers, which had three main positive effects: (1) shearing bubbles; (2) changing bubble moving tracks; (3) enhancing bubble dispersion, and one passive effect: reducing the velocity magnitude and turbulence kinetic energy of mixed liquid. A novel OMT model was established to provide a new OMT coefficient expression. Compared with the previously established model, this novel OMT model represents actual wastewater treatment operation more closely, and provides a better knowledge for OMT efficiency in the presence of the carriers in wastewater treatment.

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Prediction of Oxygen Mass Transfer in the Presence of Plastic Carriers

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