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[2018-11-13]Emissions of airborne pollutants from municipal solid waste incineration plants;Investigation of industrial plumes from metalworking activities during the NANO-INDUS project
发布时间:2018-11-09

报告人:   Ari Setyan, Ph.D.

报告题目-1: Emissions of airborne pollutants from municipal solid waste incineration plants

报告时间:   11月13日14:00 – 15:00

报告题目-2: Investigation of industrial plumes from metalworking activities during the NANO-INDUS project

报告时间:    11月13日15:00 – 16:00

报告地点:   LAPC和光厅


Bio sketch of Ari Setyan:


Ari Setyan is research scientist at Empa (Swiss Federal Laboratories for Materials Science and Technology) and ETH Zürich, in the group of Prof. Jing Wang since 2014. He obtained his Bachelor (2001) and Master (2002) degrees in Chemistry from the University of Geneva (Switzerland), and his Ph.D. degree (2009) in Life Sciences from the University of Lausanne (Switzerland). Before joining Empa, Ari Setyan was also postdoctoral researcher at the University of California, Davis (2010/12), at the Université du Littoral Côte d’Opale (Dunkirk, France, 2012/13), and at the Ecole des Mines de Douai (France, 2013/14). His main research interests are the investigation of sources and processes of airborne particles during field campaigns, and the physico-chemical characterization of particles from various sources during laboratory studies. Ari Setyan is the author or co-author of 34 peer-reviewed publications (783 citations, h-index = 15).



Abstract:


1. Emissions of airborne pollutants from municipal solid waste incineration plants

The incineration of solid waste can be a major source of pollutants, depending on the conditions in which the incineration is performed, and the efficiency of the abatement technologies used in the incineration plants. During this seminar, results obtained during a field campaign that we conducted in two municipal solid waste incineration plants in Switzerland will be presented. The aim was to measure particles at different locations of the abatement system and those released from the stacks into the atmosphere, in order to assess the efficiency of the abatement system and the environmental impact of these plants. In the second part of this seminar, similar studies performed in China will be presented, in order to show a comparison between the waste management and abatement technologies in Switzerland and China, as well as the effects on the emission of airborne pollutants in both countries.

During our study, we used a large set of instruments to measure the particle concentrations, size distributions, chemical compositions, and morphologies. Volatile organic compounds (VOCs) were also sampled for subsequent analysis in the laboratory, and trace gases (NOx, SO2, CO, CO2, and O2) were monitored. The incineration plants of Hinwil and Giubiasco were both equipped with an electrostatic precipitator, a DeNOxsystem based on the selective catalytic reduction (SCR) technology, and bag-house filters. In addition to that, Giubiasco was equipped with a wet scrubber and Hinwil with a dry scrubber. At Giubiasco, measurements after the electrostatic precipitator were performed in two conditions, with the precipitator running and with one of the three units of the precipitator shut down.

The particle number concentration decreased significantly at two locations of the plants: at the electrostatic precipitator and the bag-house filters. The particle concentrations measured at the stacks were very low (< 100 #/cm3), stressing the efficiency of the abatement system of the two plants. Particles released from the stacks into the environment were compared to those collected at a downwind site. At the stacks, particles had a relatively uniform shape and size, and were possibly constituted of ammonium chloride salts. We did not observe significant amounts of this type of particles at the near-field downwind site of Giubiasco, and the concentration of chloride was rather low there, suggesting that the incineration plants released very limited amounts of particles to the surrounding areas.


2. Investigation of industrial plumes from metalworking activities during the NANO-INDUS project


As part of the NANO-INDUS project, a 1-month field campaign was performed at a site located in the industrial area of Grande-Synthe, near the city of Dunkirk (France), in May/June 2012. The main objectives were to provide (a) new data on PM2.5chemical compositions, heavy-metal concentrations and trace gases released by metalworking activities and (b) new information on the near-field evolution (up to about a thousand meters) of such industrial plumes in terms of particle chemical composition and size distribution. Comparisons between several elemental ratios (mainly Mn/Fe), particle size distributions and volatile organic compound (VOC) concentrations at the stacks and at a near-field site suggest that plumes of a ferromanganese alloy plant were quickly mixed with pollutants emitted by other sources (mainly other industries, possibly traffic and sea spray), in particular a neighboring steelworks, before reaching the sampling site. This led to the emergence of secondary particles related to condensation and/or aggregation phenomena inside the plumes. Metalworking emissions were identified as a source of new particle formation, formed through the emission of gaseous precursors and their fast transformation and condensation, over a timescale of minutes before reaching the near-field site 800 m downwind. Ultrafine particles emitted at the stacks also quickly agglomerated to form larger particles before reaching the near-field site. These results show that, even over short distances, the chemical composition of metalworking plumes may evolve rapidly and the characteristics of particles at the boundary of an industrial area (especially in contiguous urban areas) may differ from those emitted directly at the stacks.

Sponsor:中华人民共和国科学技术部,中国科学院 webmaster: changwy[AT]mail.iap.ac.cn