Abstract: Greenhouse gases CO2, CH4 and N2O were monitored for up to one year in the tail gas of five municipal solid waste incinerators, the areas covered with films of two domestic waste landfills and open processing pools of two wastewater disposals, respectively. The average annual CO2 emission capacity of tons of waste in the flue gas of incinerator tail was in the range of 0.653 to 0.797 t. The relative error between the calculated value and the monitored value was as low as 1.86% under stable operating conditions. The greenhouse gas emission flux in the covered area of landfill fluctuated greatly with the seasons. The maximum emission levels of CO2 could reach 11.13 g/(m2·h), CH4 could reach 0.98 g/(m2·h), and N2O could reach 3.519 mg/(m2·h) in the southern region in summer. The CO2 and N2O emissions from the wastewater treatment process tank were mainly in the aeration tank, in which CO2 was not affected by the seasonal change, and N2O fluctuated greatly throughout the year. As to CH4, the discharge fluxes in the north sewage plant had obvious seasonal differences, and the values of anoxic pool, selective pool and anaerobic pool were the highest in summer. The highest data was 1.60 g/(m2·h). The CH4 discharge capacity of the sewage treatment process tank in southern China was still dominated by three aeration tanks, which fluctuated greatly throughout the year and had no obvious seasonal difference, and could reach about 0.40 g/(m2·h).

Key words: greenhouse gas, carbon monitoring, waste incineration, waste landfill, wastewater disposal