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Accumulation of elements in Salix and other species used in vegetation filters with focus on wood fuel quality

Adler, Anneli (2007). Accumulation of elements in Salix and other species used in vegetation filters with focus on wood fuel quality. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2007:6
ISBN 978-91-576-7305-3
[Doctoral thesis]

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Abstract

Woody or herbaceous perennials used as vegetation filters for treatment of different types of wastes can be suitable for production of solid biofuels when their aboveground harvestable biomass yield is sufficiently high and when biomass contains appropriate concentrations of minerals with regard to fuel combustion processes. The concentrations of nitrogen (N), potassium (K) and heavy metals (especially Zn and Cd) in fuel should be low and calcium (Ca) concentrations high to avoid technical problems and environmentally harmful emissions during combustion. Since soil supplementation with essential elements improves biomass yield, a conflict might arise between yield and quality aims. There are various possibilities to influence fuel quality during the growing phase of the life cycle of perennial biomass crops. This study assessed the suitability of two deciduous woody perennials (Salix and Populus) and two summer green herbaceous perennials (Phragmites and Urtica) for phytoremediation in terms of growth and nutrient allocation patterns. Salix and Populus proved suitable as vegetation filters when nutrients were available to plants in near-optimal proportions, but when unbalanced nutrient solutions (wastewater) were applied, stem biomass fraction was strongly reduced. Phragmites was more tolerant to wastewater treatment in terms of plant biomass production and nutrient allocation patterns, so if the N:P ratio of the wastewater is suboptimal, a vegetation filter using Phragmites could be considered. In further studies, a method was developed to determine the proportions of nutrient-rich bark in coppiced Salix, while heavy metal phytoextraction capacity was assessed in two Salix vegetation filters. The relevance of proportion of bark on wood fuel quality and element removal from vegetation filters was also investigated. The concentrations of the elements studied in harvestable Salix shoot biomass were higher, meaning lower wood fuel quality, in plantations where proportion of bark was high. Removal of elements increased with biomass yield. As proportion of nutrient-rich bark decreases with increasing yield, longer cutting cycles should be considered, in order to improve fuel quality and nutrient removal potential.

Authors/Creators:Adler, Anneli
Title:Accumulation of elements in Salix and other species used in vegetation filters with focus on wood fuel quality
Year of publishing :2007
Volume:2007:6
Number of Pages:34
Papers/manuscripts:
NumberReferences
ALLI. Adler, A., Karacic, A. & Weih, M. Biomass allocation and nutrient use in fast-growing woody and herbaceous perennials used for phytoremediation. (Submitted to Basic and Applied Ecology). II. Adler, A., Verwijst, T. & Aronsson, P. 2005. Estimation and relevance of bark proportion in a willow stand. Biomass and Bioenergy 29, 102-113. III. Dimitriou, I., Eriksson, J., Adler, A., Aronsson, P. & Verwijst, T. 2006. Fate of heavy metals after application of sewage sludge and wood-ash mixtures to short-rotation willow coppice. Environmental Pollution 142(1), 160-169. IV. Adler, A., Dimitriou, I., Aronsson, P., Verwijst, T. & Weih, M. Wood fuel quality of two Salix viminalis stands fertilised with sludge, ash and sludge-ash mixtures. (Submitted to Biomass and Bioenergy).
Place of Publication:Uppsala
ISBN for printed version:978-91-576-7305-3
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agrovoc terms:salix, populus, phragmites, urtica, fuel crops, bioremediation, wastewater treatment, ashes, heavy metals, coppice system, leachates, landfills, sewage sludge, nitrogen, phosphorus, growth, fuelwood, quality
Keywords:ash, domestic wastewater, growth form, heavy metals, landfill leachate, municipal sludge, nitrogen use efficiency, phosphorus use efficiency, short-rotation coppice
URN:NBN:urn:nbn:se:slu:epsilon-1405
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-1405
ID Code:1324
Department:(NL, NJ) > Dept. of Crop Production Ecology
Deposited By: Anneli Adler
Deposited On:17 Jan 2007 00:00
Metadata Last Modified:02 Dec 2014 10:11

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