Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Membrane filtration of alkali-depolymerised kraft lignin for biological conversion

Abdelaziz, Omar Y. LU ; Ravi, Krithika LU ; Nöbel, Matthias ; Tunå, Per LU ; Turner, Charlotta LU orcid and Hulteberg, Christian P. LU orcid (2019) In Bioresource Technology Reports 7.
Abstract

In this study, we have investigated the possibility of membrane filtration as a means for obtaining a fraction containing mainly low-molecular-weight (LMW) compounds from depolymerised lignin (DL) for subsequent microbial conversion. A DL stream from continuous-mode alkali depolymerisation of a softwood kraft lignin produced at a temperature of 220 °C and a residence time of 2 min, using a NaOH/lignin weight ratio of 1 with 5 wt% lignin loading was fractionated using a polymeric membrane with a molecular weight cut-off of 500–700 Da. The permeate (DLP) volume recovery of LMW phenolics (250–450 Da) was 70% after filtration for 3.7 h. The DLP was used as a carbon source for growth of three bacterial strains; Pseudomonas fluorescens, P.... (More)

In this study, we have investigated the possibility of membrane filtration as a means for obtaining a fraction containing mainly low-molecular-weight (LMW) compounds from depolymerised lignin (DL) for subsequent microbial conversion. A DL stream from continuous-mode alkali depolymerisation of a softwood kraft lignin produced at a temperature of 220 °C and a residence time of 2 min, using a NaOH/lignin weight ratio of 1 with 5 wt% lignin loading was fractionated using a polymeric membrane with a molecular weight cut-off of 500–700 Da. The permeate (DLP) volume recovery of LMW phenolics (250–450 Da) was 70% after filtration for 3.7 h. The DLP was used as a carbon source for growth of three bacterial strains; Pseudomonas fluorescens, P. putida EM42 and Rhodococcus opacus, and good growth was obtained by the first two microorganisms. This proof-of-concept study demonstrates a novel strategy for technical lignin valorisation by combining depolymerisation, nanofiltration and bioconversion.

(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
Alkali depolymerisation, Bacterial conversion, Lignin valorisation, Lignocellulosic biorefinery, Nanofiltration, Pseudomonas
in
Bioresource Technology Reports
volume
7
article number
100250
publisher
Elsevier
external identifiers
  • scopus:85076066265
ISSN
2589-014X
DOI
10.1016/j.biteb.2019.100250
language
English
LU publication?
yes
id
c73f14e5-1435-4be3-8ddd-296d3b247bf1
date added to LUP
2019-12-16 20:49:28
date last changed
2024-05-01 02:48:34
@article{c73f14e5-1435-4be3-8ddd-296d3b247bf1,
  abstract     = {{<p>In this study, we have investigated the possibility of membrane filtration as a means for obtaining a fraction containing mainly low-molecular-weight (LMW) compounds from depolymerised lignin (DL) for subsequent microbial conversion. A DL stream from continuous-mode alkali depolymerisation of a softwood kraft lignin produced at a temperature of 220 °C and a residence time of 2 min, using a NaOH/lignin weight ratio of 1 with 5 wt% lignin loading was fractionated using a polymeric membrane with a molecular weight cut-off of 500–700 Da. The permeate (DLP) volume recovery of LMW phenolics (250–450 Da) was 70% after filtration for 3.7 h. The DLP was used as a carbon source for growth of three bacterial strains; Pseudomonas fluorescens, P. putida EM42 and Rhodococcus opacus, and good growth was obtained by the first two microorganisms. This proof-of-concept study demonstrates a novel strategy for technical lignin valorisation by combining depolymerisation, nanofiltration and bioconversion.</p>}},
  author       = {{Abdelaziz, Omar Y. and Ravi, Krithika and Nöbel, Matthias and Tunå, Per and Turner, Charlotta and Hulteberg, Christian P.}},
  issn         = {{2589-014X}},
  keywords     = {{Alkali depolymerisation; Bacterial conversion; Lignin valorisation; Lignocellulosic biorefinery; Nanofiltration; Pseudomonas}},
  language     = {{eng}},
  month        = {{09}},
  publisher    = {{Elsevier}},
  series       = {{Bioresource Technology Reports}},
  title        = {{Membrane filtration of alkali-depolymerised kraft lignin for biological conversion}},
  url          = {{http://dx.doi.org/10.1016/j.biteb.2019.100250}},
  doi          = {{10.1016/j.biteb.2019.100250}},
  volume       = {{7}},
  year         = {{2019}},
}