Fly Ash from the Combustion of Post-Consumer Waste Wood: Distribution of Heavy Metals by Particle Size

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TITLE

Fly Ash from the Combustion of Post-Consumer Waste Wood: Distribution of Heavy Metals by Particle Size

ABSTRACT

In industrialized countries considerable amounts of post-consumer waste wood are generated, which can be used as fuel in combustion processes. Because of the contamination of the waste wood with heavy metals, the ash produced contains higher amounts of some heavy metals. In the investigated fly ash the concentrations were within the published range. Generally, the enrichment of the heavy metals in the fine fraction was equal to or less compared to reported data for wood combustion fly ash. The main exception to this was Mn, which was enriched in the fine fractions in this study while in wood combustion fly ash the concentration was independent of the particle size. For the heavy metals Cd, Pb and Zn the dependence of the concentration on the particle size was similar to published data for wood combustion fly ash. The size dependence of the sulfate concentration was even more pronounced. The dry flue gas desulphurization unit operated in the investigated plant is likely to be responsible for this difference.

KEYWORDS

Waste wood, combustion, fly ash, heavy metals, particle size, air classification

REFERENCES

[1] Frühwirth, W., Stark, W., Pilz, H., Schweighofer, J., Vermeidung und Verwertung von getrennt gesammelten Abfällen und hausmüllähnlichen Abfällen aus Gewerbe und Industrie in Österreich, Bundesministerium für Land- und Forstwirtschaft, Umwelt und Wasserwirtschaft, Wien, 2005

[2] McKeever, D.B., Falk, R.H., Woody residues and solid waste wood available for recovery in the United States, 2002, Management of Recovered Wood, Recycling, Bioenergy other Options, University Studio Press, Thessaloniki, 2004.

[3] Thrän, D., Holzartige Biomasse, in: Kaltschmitt, M., Hartmann, H., Hofbauer, H. (Eds.), Energie aus Biomasse, Grundlagen, Techniken und Verfahren, 2nd Ed., Springer Verlag, Berlin, pp. 135-170, 2009.

[4] Nzihoua, A., Stanmore, B., The fate of heavy metals during combustion and gasification of contaminated biomass—A brief review, C. Lanzerstorfer Journal of Hazardous Materials, Vol.256– 257, No.1, 2013, pp. 56– 66.

[5] H Lanzerstorfer, C., Characterization of fly ashes from the combustion of post-consumer waste wood. Proceedings of the 4th European Conference on Renewable Energy Systems, Aug. 28.-31., Istanbul, pp. 925-930, 2016.

[6] van Loo, S., Koppejan, J., The Handbook of Biomass Combustion and Co-firing, Earthscan, London, 2008.

[7] Berg, M., Combustion of Waste Wood: Swedish Experiences and Research, Joint Meeting IEA Bioenergy Task 32,33 and 36, Oct. 28t., Tokyo, 2003.

[8] Lanzerstorfer, C., Chemical composition and physical properties of filter fly ashes from eight grate-fired biomass combustion plants, Journal of Environmental Sciences, Vol.30, No.1, 2015, pp. 191-197.

[9] Lanzerstorfer, C., Cyclone fly ash from a grate-fired biomass combustion plant: dependence of the concentration of various components on the particle size, Fuel Processing Technology, Vol.131, No.1, 2015, pp. 382-388

[10] Lanzerstorfer, C., Model based prediction of required cut size diameter for fractionation of fly ash from a grate-fired wood chips incineration plant, Fuel Processing Technology, Vol.92, No.5, 2011, pp. 1095-1100.

[11] Lanzerstorfer, C., Kröppl, M., Air classification of blast furnace dust collected in a fabric filter for recycling to the sinter process. Resources, Conservation and Recycling, Vol.86, No.1, 2014, pp. 132-137.

[12] Lanzerstorfer, C., Investigation of the contamination of a fly ash sample during sample preparation by classification, International Journal of Environmental Science and Technology, Vo.12, No.4, 2015, pp. 1437-1442.

[13] Linak, W.P., Wendt, J.O.L., Toxic metal emissions from incineration: Mechanisms and control, Progress in Energy and Combustion Science, Vol.19, No.2, 1993, 145-185.

Cite this paper

C. Lanzerstorfer. (2017) Fly Ash from the Combustion of Post-Consumer Waste Wood: Distribution of Heavy Metals by Particle Size. International Journal of Environmental Science, 2, 438-442