“…Most CH4 emissions occur during the thermophilic stage of composting due to the coexistence of labile carbon compounds and anoxic microsites (Anderson et al, 2010;Chowdhury et al, 2014), and the activity of methanogens increases at high temperatures (Ermolaev et al, 2014). Chowdhury et al (2014) and Vu et al (2015) showed that more than 70% of CH4 production occurs during the thermophilic phase. On the other hand, N2O is emitted after the thermophilic stage because nitrifying and denitrifying bacteria are mesophilic (Hao et al, 2004;Vu et al, 2015).…”