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Waste to energy: air pollutant emissions from the steam boilers using recycled waste wood


Tsai, Jiun Horng and Lin, Kuo Hsiung and How, Vivien and Deng, Yu An and Chiang, Hung Lung (2021) Waste to energy: air pollutant emissions from the steam boilers using recycled waste wood. Aerosol and Air Quality Research, 21 (12). pp. 1-16. ISSN 1680-8584; ESSN: 2071-1409


In Taiwan, combustible wood mostly comes from waste pallets and scrap packaging materials discarded by factories, which produced a total of 278,067 tons of waste wood in 2019. In this study, the heat value of waste wood was 18.3 ± 1.07 MJ kg–1. The measured volatile fraction was 76.5 ± 7.34%, the fixed carbon was 15.7 ± 3.19%, the ash content was 2.96 ± 2.45%, and the moisture content was 21.6 ± 10.2%. The proportions of the elemental constituents in the waste wood were 45.3 ± 4.95%, 46.9 ± 3.94%, 5.9 ± 0.44%, 0.21 ± 0.17%, 0.29 ± 0.26%, and 0.02 ± 0.02% for carbon, oxygen, hydrogen, sulfur, nitrogen, and chlorine, respectively. The average boiler capacity was 11.5 ± 6.84 ton hr–1, the average fuel consumption of the boilers was 1.47 ± 1.81 ton hr–1, the average operating temperature of the boilers was 853 ± 228°C, the average steam generation of the boilers was 7.63 ± 5.97 ton hr–1, and the average exhaust flow rate was 246.6 ± 200.9 m3 min–1. The main air pollution control systems used in the waste wood combustion boilers were systems combining a cyclone, a baghouse and a scrubber (37.8%), a cyclone and a baghouse (28.4%), a cyclone and a scrubber (10.2%), and systems using a baghouse only (9.8%). Based on our fuel consumption data, the air pollutant emission factors were 0.71 ± 1.44 kg per ton of wood for PM, 0.86 ± 1.47 kg per ton of wood for SOx, and 5.24 ± 9.56 kg per ton of wood for NOx. In July 2022, new emission standards for boilers will be implemented, and emission reductions of at least 30% for PM, 35% for NOx and 7% for SO2 will be required.

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Official URL or Download Paper: https://aaqr.org/articles/aaqr-21-11-oa-0301

Additional Metadata

Item Type: Article
Divisions: Faculty of Medicine and Health Science
DOI Number: https://doi.org/10.4209/aaqr.210301
Publisher: Taiwan Association for Aerosol Research
Keywords: Waste wood; Boiler; Air pollution control system; Emission factor
Depositing User: Mohamad Jefri Mohamed Fauzi
Date Deposited: 22 Nov 2022 08:50
Last Modified: 22 Nov 2022 08:50
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.4209/aaqr.210301
URI: http://psasir.upm.edu.my/id/eprint/93567
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