The rational research on allowed increment limit of air pollutants

• Main Authors: Du-Ming Tsai, 蔡篤明
• Other Authors: Ken-Hui Chang
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/75414280980951903624

碩士 === 國立雲林科技大學 === 環境與安全工程系碩士班 === 97 === Taiwan EPA has contributed to improve air quality in Taiwan and has desired the maximum allowable amount based on concept of total amount. Besides, according to attainment or non-attainment district, Taiwan EPA has issued a declaration of emission amount standards and allowed increment limit air quality to regular installation of new point source and modification of existed point source. With no consideration of technical feasibility and economic benefits, the research statistics the control status of emission and stack numbers and its rationality based on TEDS6.1 (Taiwan Emission Data System, 2003) under present regulation standards. Furthermore, the research utilizes TAQM (Taiwan Air Qaulity Model) to assess allowable capacity of NOx and NMHCs in Central Air Basin for future years, then studies the relationship between the allowable capacity of NOx and allowed increment limit of NO2 annual average standard. Statistical results reveal that under nowadays emission amount standards and allowed increment limit of air polllutants, NO2 hourly average standard which can regulate 4% percentile of total stack numbers and 77% of NOx emission is the most strict. Nevertheless, other standard items all can regulate approximately 1% of stack numbers, then SO2 hourly average standard and TSP 24-hour average standard can regulate 51% and 37% of total stack numbers respectively among these standard items. All above show that neither emission amount standards nor allowed increment limit of air pollutants could regulate consistent percentile of emissions. Considering the progress of regulation, this research suggests to tighten emission amount standards by the emission percentile of 85% and to tighten allowed increment limit of air pollutants by the emission percentile of 75%. NOx and NMHCs emissions of Central Air Basin in Taiwan are 123,000 MT/yr and 154,000 MT/yr respectively for base year 2003. Allowable capacity of NOx and NMHCs are assessed by cumulated frequency method. The results shows that following the emission ratio of 1 to 2.5 NOx and NMHCs emission reduction percentile are respectively 7.5% and 15% of base year emissions for year 2011, and are respectively 12.8% and 25% for year 2016. In the invariable condition of area source and line source, the emission percentile of 15% which NO2 annual average standard could regulate in Central Air Basin needs 50% and 86% of all the regulated to be reduced to reaching the aim of year 2011 and 2016 perspectively. Besides, the emission percentile of 85% which is NO2 hourly average standard could regulate needs 50% and 86% of all the regulated to be reduced for year 2011 and 2016 separately. To reach the goal of year 2011 and 2016, installation of new point source and modification of existed point source acquiring a substitution of 1.2-fold emissions designed to install or modify should be regulated the emission percentile of 35% and 64% perspectively.