The project was to compile and update the emissions of Waste Sector in 2020 and 2021 using the recommended methodologies in 2006 Intergovernmental Panel on Climate Change Guidelines for National Greenhouse Gas Inventories (IPCC 2006 Guidelines). In addition, planning the long-term roadmap of Waste Sector based on the demanding of carbon reduction. The main achievements of the project were as follows. Update the emissions of Waste Sector from 1990 to 2021. According to the result, the emissions of Waste Sector in 2021 was 2,679.2 ktCO2e, which had declined 63.1% compared to the baseline year, while increased by 2.9% compared to 2020 owing to incineration. The emissions of domestic and industrial wastewater treatment are the largest contributor from the Waste Sector, accounting for 55.8%. Gases from the Waste sector was mostly methane, accounting for 67.5%. In addition, to compare the emissions trend and per-capita carbon emissions of our country with other countries, analyzed five National Inventory Report (NIR). The results showed that decrease the waste amount in landfill is a major carbon reduction strategy for countries. The per-capita carbon emissions of Taiwan was 0.11 kt-CO2 eq, only higher than Swedan. The dimension of Waste sector’s carbon reduction strategy is board, to show the accomplishment complete, the project evaluated the carbon reduction from bioenergy and waste reuse. The results showed that 571.6 and 639.0 ktCO2e were reduced in 2021 and 2022, respectively. Among of all, recycling plastics and use SRF were major contributor. In addition, the project analyzed the carbon intensity of 24 incinerators in Taiwan. The results showed that the carbon intensity rise to 1.14 kgCO2e/kwh in 2022 due to the higher plastics ratio in treated waste. To reduce the emission of wastewater treatment and implement the reduction strategy in waste sector, seminar was hold, aiming to share the experience of biogas recovery in domestic and industry wastewater treatment plants. Besides, to investigate the information of biogas recovery in domestic and industry wastewater treatment plants, the project proposed the mechanism of biogas recovery data gathering. Also held a cross-department meeting to discuss the possibility of the mechanism.

Greenhouse gas, waste sector, national inventory report (NIR), localization emission parameter, CO2 emission reduction strategies