| 英文摘要 |
The project was to compile and update the emissions of Waste Sector in 2019 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 2019. According to the result, the emissions of Waste Sector in 2019 was 2,703.2 ktCO2e, which had declined 63.1% compared to the baseline year, showing the accomplish of the sector. The emissions of domestic and industrial wastewater treatment are the largest contributor from the Waste Sector, accounting for 65.81%, while the emissions form landfills, incineration and compost account for 24.26%, 8.21% and 1.73%, respectively. Gases from the Waste sector was mostly methane, accounting for 77.75%. In addition, to compare the emissions trend and per-capita carbon emissions of our country with other countries, analyzed 7 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 Singapore and Swedan.
To plan the carbon reduction roadmap, compile the Net Zero pathway of the Waste sector proposed by other countries, and based on the situation in Taiwan to plan the long-term reduction strategies. According to the assessment, in BAU scenario, the emissions would be 3,462.7 kt-CO2 eq in 2050; under the existing policy, the emissions would be 2,736.0 kt-CO2 eq ; while under long-term reduction pathway, the emissions would reduce to 1,003.2 kt-CO2 eq.
In addition, owing the highest emissions of domestic and wastewater treatment, 2 domestic wastewater treatment plants (WWTPs) and 5 industry wastewater treatment plants with the biogas recovery equipment or potential in setting biogas equipment were visited, for understanding the biogas recovery situation and assessing the potential in setting biogas equipment. Moreover, measuring the GHGs emissions from 3 food industries and three printed circuit board industries wastewater treatment process, so as to build the country-specific emission factors (EF). The percentage of COD removal in measured food industries and printed circuit board industries accounted for 37.44% and 9.65% of the corresponded
industry, respectively. The results showed that food industries’ EF was 5.50×10-4 kg CH4/kg COD and 1.02×10-5 kg N2O/kg-N, while the EF of printed circuit board industries was 8.90×10-4 kg CH4/kg COD and 1.36×10-4 kg N2O/kg-N.
To refine the Waste sectors’ inventory, the opinion by expert review teams (ERT) of 5 Annex I parties was analyzed, to be the matters needing attention as a follow-up refinement of Taiwan greenhouse gas inventory report. Besides, analyzing the content of 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories to propose the refinement of Waste Sector emissions
calculation, including landfill treatment, domestic and wastewater treatment.
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