Advanced

Novel sustainable alternatives for the fashion industry: A method of chemically recycling waste textiles via acid hydrolysis

Sanchis Sebastia, Miguel LU ; Ruuth, Edvin LU ; Stigsson, Lars LU ; Galbe, Mats LU and Wallberg, Ola LU (2021) In Waste Management: international journal of integrated waste management, science and technology 121. p.248-254
Abstract
The fashion industry has a considerable environmental impact, especially due to the increased generation of waste textiles as a result of fast fashion business models. Although fiber-to-fiber recycling processes are being developed, such a process is in reality a downcycling process, in which the mechanical properties of the textile fibers are impoverished with each cycle. Thus, new alternatives are required to completely close the fashion loop through chemically recycling textile fibers unfit for other types of recycling or resale due to their poor quality. We have evaluated the possibility of using acid hydrolysis to directly depolymerize the cotton fibers in waste textiles to produce a glucose solution, which could subsequently be used... (More)
The fashion industry has a considerable environmental impact, especially due to the increased generation of waste textiles as a result of fast fashion business models. Although fiber-to-fiber recycling processes are being developed, such a process is in reality a downcycling process, in which the mechanical properties of the textile fibers are impoverished with each cycle. Thus, new alternatives are required to completely close the fashion loop through chemically recycling textile fibers unfit for other types of recycling or resale due to their poor quality. We have evaluated the possibility of using acid hydrolysis to directly depolymerize the cotton fibers in waste textiles to produce a glucose solution, which could subsequently be used for the production of chemicals or fuels. Although a one-step procedure with sulfuric acid was unable to deliver high glucose production, it was possible to achieve a glucose yield over 90% through a two-step procedure, in which concentrated and dilute sulfuric acid were combined to exploit the benefits of both concentrations. Glucose concentrations around 40 g/L were achieved by increasing the solids loading in the two-step process, which might be sufficiently high for the fermentation of the solution into high-value products. Thus, this study demonstrates that it would be possible to chemically recycle (cellulose-based) waste textiles via acid hydrolysis, which, if correctly designed, could avoid the need to use enzymes to achieve high conversion efficiencies. (Less)
Please use this url to cite or link to this publication:
author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
cotton, recycling, waste textiles, acid hydrolysis
in
Waste Management: international journal of integrated waste management, science and technology
volume
121
pages
7 pages
publisher
Elsevier
external identifiers
  • scopus:85098737251
  • pmid:33388647
ISSN
0956-053X
DOI
10.1016/j.wasman.2020.12.024
language
English
LU publication?
yes
id
8ede8b63-e38b-4bbb-bbcb-9aa15dbd4cc7
date added to LUP
2021-01-05 09:30:17
date last changed
2021-04-07 03:00:24
@article{8ede8b63-e38b-4bbb-bbcb-9aa15dbd4cc7,
  abstract     = {The fashion industry has a considerable environmental impact, especially due to the increased generation of waste textiles as a result of fast fashion business models. Although fiber-to-fiber recycling processes are being developed, such a process is in reality a downcycling process, in which the mechanical properties of the textile fibers are impoverished with each cycle. Thus, new alternatives are required to completely close the fashion loop through chemically recycling textile fibers unfit for other types of recycling or resale due to their poor quality. We have evaluated the possibility of using acid hydrolysis to directly depolymerize the cotton fibers in waste textiles to produce a glucose solution, which could subsequently be used for the production of chemicals or fuels. Although a one-step procedure with sulfuric acid was unable to deliver high glucose production, it was possible to achieve a glucose yield over 90% through a two-step procedure, in which concentrated and dilute sulfuric acid were combined to exploit the benefits of both concentrations. Glucose concentrations around 40 g/L were achieved by increasing the solids loading in the two-step process, which might be sufficiently high for the fermentation of the solution into high-value products. Thus, this study demonstrates that it would be possible to chemically recycle (cellulose-based) waste textiles via acid hydrolysis, which, if correctly designed, could avoid the need to use enzymes to achieve high conversion efficiencies.},
  author       = {Sanchis Sebastia, Miguel and Ruuth, Edvin and Stigsson, Lars and Galbe, Mats and Wallberg, Ola},
  issn         = {0956-053X},
  language     = {eng},
  month        = {02},
  pages        = {248--254},
  publisher    = {Elsevier},
  series       = {Waste Management: international journal of integrated waste management, science and technology},
  title        = {Novel sustainable alternatives for the fashion industry: A method of chemically recycling waste textiles via acid hydrolysis},
  url          = {http://dx.doi.org/10.1016/j.wasman.2020.12.024},
  doi          = {10.1016/j.wasman.2020.12.024},
  volume       = {121},
  year         = {2021},
}