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Chlorine and ash removal from salt-laden woody biomass by washing and pressing Lee, Jun Sian; Ghiasi, Bahman; Lau, Anthony K.; Sokhansanj, Shabab
Abstract
Over 11 million cubic meters of timber were harvested from the coastal forests of British Columbia in 2017. For transport, the logs are usually floated in the water and towed along the coastal waters along Fraser River to sawmills. The submerged timber’s chlorine content is up to 100 times higher than the timber harvested from inland. The sawmill residues leftover from cutting the salt-laden timber are unsuitable to be burned in boilers. In this study, ground sawdust, bark, and wood chips of three species from the Lower Mainland: Douglas fir, hemlock, and western red cedar, as well as spruce-pine-fir (SPF) from Vancouver Island, were washed for 5 min using tap water under constant stirring and pressed on a flat metal bed for 30 s using a mechanical hydraulic press. The chlorine content dropped from 2,000-24,000 ppm to below 700 ppm db (dry basis). The low salt biomass meets the ISO 17225-2 quality standard for wood pellets. The chlorine removal efficiency of this treatment method was 88-95%. The reduction in ash content of the washed and pressed samples ranged was 45-85% of the ash in the untreated biomass.
Item Metadata
Title |
Chlorine and ash removal from salt-laden woody biomass by washing and pressing
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Creator | |
Contributor | |
Date Issued |
2021-10-23
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Description |
Over 11 million cubic meters of timber were harvested from the coastal forests of British
Columbia in 2017. For transport, the logs are usually floated in the water and towed along the
coastal waters along Fraser River to sawmills. The submerged timber’s chlorine content is up to
100 times higher than the timber harvested from inland. The sawmill residues leftover from
cutting the salt-laden timber are unsuitable to be burned in boilers. In this study, ground sawdust,
bark, and wood chips of three species from the Lower Mainland: Douglas fir, hemlock, and
western red cedar, as well as spruce-pine-fir (SPF) from Vancouver Island, were washed for 5
min using tap water under constant stirring and pressed on a flat metal bed for 30 s using a
mechanical hydraulic press. The chlorine content dropped from 2,000-24,000 ppm to below 700
ppm db (dry basis). The low salt biomass meets the ISO 17225-2 quality standard for wood
pellets. The chlorine removal efficiency of this treatment method was 88-95%. The reduction in
ash content of the washed and pressed samples ranged was 45-85% of the ash in the untreated
biomass.
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Subject | |
Genre | |
Type | |
Language |
eng
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Date Available |
2025-01-15
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0447758
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URI | |
Affiliation | |
Citation |
Lee, J. S., Ghiasi, B., Lau, A. K., & Sokhansanj, S. (2021). Chlorine and ash removal from salt-laden woody biomass by washing and pressing. Biomass and Bioenergy, 155.
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Publisher DOI |
10.1016/j.biombioe.2021.106272
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Peer Review Status |
Reviewed
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Scholarly Level |
Faculty; Postdoctoral
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International