Abstract
The gas-liquid mass transfer issue has always been a challenge in the biological oxidation of methane waste gas treatment. Therefore, this study aims to apply the Downflow Hanging Sponge (DHS) that widely used in wastewater treatment, to mitigate the gas-liquid mass transfer obstacles on methane waste gas treatment. The comprehensive experimental results indicate that among the three sponge carriers, the Melamine Foam (MF) exhibits the strongest wettability, characterized by smaller pore size and a uniformly arranged pore structure. And it demonstrates excellent performance in methane degradation. (maintaining methane degradation efficiency above 5mol·h-1m-3 in the third phase.) Furthermore, the combined analysis of microbial QPCR and KEGG reveals that the MF sponge possesses a more diverse microbial population and superior methane oxidation capability compared to the other two sponges. This study confirms the superiority of the MF sponge as a biological carrier, capable of enhancing the efficiency of DHS treatment of methane waste gas and providing valuable suggestions for carrier selection and modification.
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