Nitrous oxide and methane emissions from food waste composting at different temperatures

作者：Ermolaev Evgheni^*; Jarvis Asa; Sundberg Cecilia; Smars Sven; Pell Mikael; Jonsson Hakan

来源：Waste Management, 2015, 46: 113-119.

DOI：10.1016/j.wasman.2015.08.021

• Aeration
• Denitrification
• Greenhouse gas
• Methanogen
• Nitrification
• Waste management

Emissions of methane (CH4) and nitrous oxide (N2O) from composting of source-sorted food waste were studied at set temperatures of 40, 55 and 67 degrees C in 10 trials performed in a controlled environment 200 L compost reactor. CH4 and N2O concentrations were generally low. In trials with 16% O-2, the mean total CH4 emission at all temperatures was 0.007% of the mineralized carbon (C), while at 67 degrees C this fraction was 0.001%. Total CH4 production was higher in the 40 degrees C trial and the limited oxygen (1% O-2) trial, with emissions of 0.029 and 0.132% of the mineralized C respectively. An early increase in N2O production was observed in trials with higher initial nitrate contents. Increased CH4 and N2O production in trials at 40 and 55 degrees C after 50% of the initial C was mineralized resulted in higher total greenhouse gas emissions. Overall, the global warming potentials in CO2-equivalents from CH4 emissions were higher than from N2O, except for composts run at 67 degrees C.

• 出版日期2015-12