Aerobic composting of digested residue eluted from dry methane fermentation to develop a zero-emission process.

•Composting digested residue eluted from dry methane fermentation.•The NO3− content in the end-product was 9.7gkg−1-TS and GI reached 151%.•Occurrence of nitrification was attributed to AOB activity.•Zero-emission process for producing ethanol-methane-compost from kitchen garbage.