WHAT TO CHANGE
Substitute the commonly used Woody-Derived Biochar (WBC) with Digestate-Derived Biochar (DBC) in landfill cover soil.
Prioritize biochar with higher ion-exchange capacity (CEC), as it enhances methane-oxidizing bacteria (MOB) growth.
Consider DBC produced from food waste, which tends to have a higher micropore ratio, specific surface area, and richer functional groups than WBC.
WHAT YOU MIGHT SEE
A nearly twofold increase in cumulative methane oxidation mass (from 7.14 mg CH4 g−1 compared to WBC).
A shift in the dominant methane-oxidizing bacteria from Type II to Type I MOB. Type I MOB have more efficient metabolic pathways for methane oxidation, making them better suited for the job.
XinyueBaia, DandanHuangb, YukeChena, MingshuaiShaoa, NingWanga, QianWanga, QiyongXua
Original paper: https://www.sciencedirect.com/science/article/abs/pii/S0045653523025493