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Life-cycle assessment of the production of cationized tannins from Norway spruce bark as flocculants in wastewater treatment

Carlqvist, Karin LU ; Arshadi, Mehrdad ; Mossing, Torgny ; Östman, Ulla Britt ; Brännström, Hanna ; Halmemies, Eelis ; Nurmi, Juha ; Lidén, Gunnar LU and Börjesson, Pål LU (2020) In Biofuels, Bioproducts and Biorefining 14(6). p.1270-1285
Abstract

It will be necessary to make efficient use of our resources if our society is to be converted into a bio-based economy. Every year large side streams of bark are produced in sawmills and pulp mills. In addition to utilizing the bark for heat and electricity production, as happens today, high-value chemical components could be extracted prior to energy conversion. These components include tannins. Cationized tannins have already been indicated as promising renewable flocculants in wastewater treatment. However, today's industrial production of tannins uses species from subtropical or temperate climates, and there has so far been little attention to the use of tannins from Norway spruce (Picea abies), an important species in forestry in... (More)

It will be necessary to make efficient use of our resources if our society is to be converted into a bio-based economy. Every year large side streams of bark are produced in sawmills and pulp mills. In addition to utilizing the bark for heat and electricity production, as happens today, high-value chemical components could be extracted prior to energy conversion. These components include tannins. Cationized tannins have already been indicated as promising renewable flocculants in wastewater treatment. However, today's industrial production of tannins uses species from subtropical or temperate climates, and there has so far been little attention to the use of tannins from Norway spruce (Picea abies), an important species in forestry in the subarctic climate. The present life-cycle assessment (LCA) was undertaken to understand the environmental performance of the production of cationized tannins from the bark of Norway spruce and how the environmental impact is distributed along the production system. This work was connected to the Interreg Botnia-Atlantica TanWat research project, which studies the production and use of cationized tannins from Norway spruce for wastewater treatment at a pilot scale. The present LCA shows that the main environmental impact stems from the reagents used in the cationization step. The purification step could also be a significant issue depending on the possibility of reusing the eluent (ethanol) and the lifetime of the resin. The importance of running the processes with as concentrated streams as possible to minimize the need of process water and energy was also confirmed

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author
; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
bark, biorefinery, extraction, life cycle assessment, tannins, wastewater treatment
in
Biofuels, Bioproducts and Biorefining
volume
14
issue
6
pages
16 pages
publisher
John Wiley and Sons
external identifiers
  • scopus:85090436402
ISSN
1932-104X
DOI
10.1002/bbb.2139
language
English
LU publication?
yes
id
921ef5b8-77b8-4714-907d-e7d1df2cae1d
date added to LUP
2020-10-02 12:20:36
date last changed
2021-01-06 03:07:45
@article{921ef5b8-77b8-4714-907d-e7d1df2cae1d,
  abstract     = {<p>It will be necessary to make efficient use of our resources if our society is to be converted into a bio-based economy. Every year large side streams of bark are produced in sawmills and pulp mills. In addition to utilizing the bark for heat and electricity production, as happens today, high-value chemical components could be extracted prior to energy conversion. These components include tannins. Cationized tannins have already been indicated as promising renewable flocculants in wastewater treatment. However, today's industrial production of tannins uses species from subtropical or temperate climates, and there has so far been little attention to the use of tannins from Norway spruce (Picea abies), an important species in forestry in the subarctic climate. The present life-cycle assessment (LCA) was undertaken to understand the environmental performance of the production of cationized tannins from the bark of Norway spruce and how the environmental impact is distributed along the production system. This work was connected to the Interreg Botnia-Atlantica TanWat research project, which studies the production and use of cationized tannins from Norway spruce for wastewater treatment at a pilot scale. The present LCA shows that the main environmental impact stems from the reagents used in the cationization step. The purification step could also be a significant issue depending on the possibility of reusing the eluent (ethanol) and the lifetime of the resin. The importance of running the processes with as concentrated streams as possible to minimize the need of process water and energy was also confirmed</p>},
  author       = {Carlqvist, Karin and Arshadi, Mehrdad and Mossing, Torgny and Östman, Ulla Britt and Brännström, Hanna and Halmemies, Eelis and Nurmi, Juha and Lidén, Gunnar and Börjesson, Pål},
  issn         = {1932-104X},
  language     = {eng},
  number       = {6},
  pages        = {1270--1285},
  publisher    = {John Wiley and Sons},
  series       = {Biofuels, Bioproducts and Biorefining},
  title        = {Life-cycle assessment of the production of cationized tannins from Norway spruce bark as flocculants in wastewater treatment},
  url          = {http://dx.doi.org/10.1002/bbb.2139},
  doi          = {10.1002/bbb.2139},
  volume       = {14},
  year         = {2020},
}