AI Article Synopsis
- Methanotrophs enhance nitrogen removal and organic compound conversion during methane oxidation, particularly in Baijiu wastewater treatment using an advanced biological filter.
- The study showed improved average removal efficiencies for chemical oxygen demand, total nitrogen, and color in reactors using methane compared to those using only air.
- Analyses indicated that Methylocaldum was key in this process, assisting in the removal of nitrogen and organic matter through energy supply and catalysis, with specific functional genes facilitating the processes.
Article Abstract
Methanotroph could facilitate nitrogen removal during methane oxidation, and promote conversion of organic compounds by producing methane monooxygenase. Co-metabolic effect and mechanism of aerobic methane oxidation on the removal of nitrogen and organic matter from Baijiu wastewater were investigated using an improved denitrifying biological filter. It was found that the average removal efficiency of chemical oxygen demand (COD), total nitrogen (TN) and chroma increased by 17 %, 22 % and 10 % in reactor B with methane compared to reactor A with air only. Three-dimensional fluorescence spectroscopy and Fourier transform infrared spectroscopy analysis revealed that methanotroph co-metabolism was accompanied by eliminating nitrogen and organic matter as well as forming alcohol compounds. Metagenomic analyses revealed that Methylocaldum, the dominant genera in Reactor B, exerted a pivotal role in removing nitrogen and organic matter removal by supplying energy and catalysis. Functional genes pmoABC-amoABC could facilitate nitrogen and organic matter removal.
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| http://dx.doi.org/10.1016/j.biortech.2024.131956 | DOI Listing |
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