Life-cycle assessment of the production of cationized tannins from Norway spruce bark as flocculants in wastewater treatment
(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
(Less)
- author
- Carlqvist, Karin LU ; Arshadi, Mehrdad ; Mossing, Torgny ; Östman, Ulla Britt ; Brännström, Hanna ; Halmemies, Eelis ; Nurmi, Juha ; Lidén, Gunnar LU and Börjesson, Pål LU
- organization
- publishing date
- 2020-11
- 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 & Sons Inc.
- 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
- 2023-12-19 06:05:31
@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}},
keywords = {{bark; biorefinery; extraction; life cycle assessment; tannins; wastewater treatment}},
language = {{eng}},
number = {{6}},
pages = {{1270--1285}},
publisher = {{John Wiley & Sons Inc.}},
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}},
}