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Cryogel-supported titanate nanotubes for waste treatment: Impact on methane production and bio-fertilizer quality.

Önnby, Linda LU ; Kirsebom, Harald LU and Ivo Achu, Nges LU (2015) In Journal of Biotechnology 207. p.58-66
Abstract
By reducing the cadmium (Cd(2+)) content in biomass used for bio-based products such as biogas, a less toxic bio-based fertilizer can be obtained. In this work, we demonstrate how a macroporous polymer can support titanate nanotubes, and we take advantage of its known selective adsorption behavior towards Cd(2+) in an adsorption process from real nutrient-rich process water from hydrolysis of seaweed, a pollutant-rich biomass. We show that pretreatment steps involving alteration in area-to-volume ratio performed in aerated and acidic conditions release the most Cd(2+) from the solid material. By integrating an adsorption step between hydrolysis and the biomethane, we show that it was possible to obtain high Cd(2+) removal (ca. 94%) despite... (More)
By reducing the cadmium (Cd(2+)) content in biomass used for bio-based products such as biogas, a less toxic bio-based fertilizer can be obtained. In this work, we demonstrate how a macroporous polymer can support titanate nanotubes, and we take advantage of its known selective adsorption behavior towards Cd(2+) in an adsorption process from real nutrient-rich process water from hydrolysis of seaweed, a pollutant-rich biomass. We show that pretreatment steps involving alteration in area-to-volume ratio performed in aerated and acidic conditions release the most Cd(2+) from the solid material. By integrating an adsorption step between hydrolysis and the biomethane, we show that it was possible to obtain high Cd(2+) removal (ca. 94%) despite molar excess (between 100 and 500) of co-present ions (e.g., Mg(2+), Ca(2+), Na(+), K(+)) and with maintained total phosphorous content. The bio-methane potential did not significantly decrease as compared to a process without cadmium removal and the yielded bio-fertilizer followed Swedish guideline values. This study provides a sound and promising alternative for a novel remediation step, enabling higher use of otherwise tricky and to some extent overlooked biomass sources. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Biotechnology
volume
207
pages
58 - 66
publisher
Elsevier
external identifiers
  • pmid:26015262
  • wos:000356450400012
  • scopus:84930644042
ISSN
1873-4863
DOI
10.1016/j.jbiotec.2015.05.014
language
English
LU publication?
yes
id
89cd1565-5df6-46f9-ad80-de9b52bc1f3e (old id 5442121)
date added to LUP
2015-06-18 11:41:06
date last changed
2017-01-01 03:30:39
@article{89cd1565-5df6-46f9-ad80-de9b52bc1f3e,
  abstract     = {By reducing the cadmium (Cd(2+)) content in biomass used for bio-based products such as biogas, a less toxic bio-based fertilizer can be obtained. In this work, we demonstrate how a macroporous polymer can support titanate nanotubes, and we take advantage of its known selective adsorption behavior towards Cd(2+) in an adsorption process from real nutrient-rich process water from hydrolysis of seaweed, a pollutant-rich biomass. We show that pretreatment steps involving alteration in area-to-volume ratio performed in aerated and acidic conditions release the most Cd(2+) from the solid material. By integrating an adsorption step between hydrolysis and the biomethane, we show that it was possible to obtain high Cd(2+) removal (ca. 94%) despite molar excess (between 100 and 500) of co-present ions (e.g., Mg(2+), Ca(2+), Na(+), K(+)) and with maintained total phosphorous content. The bio-methane potential did not significantly decrease as compared to a process without cadmium removal and the yielded bio-fertilizer followed Swedish guideline values. This study provides a sound and promising alternative for a novel remediation step, enabling higher use of otherwise tricky and to some extent overlooked biomass sources.},
  author       = {Önnby, Linda and Kirsebom, Harald and Ivo Achu, Nges},
  issn         = {1873-4863},
  language     = {eng},
  pages        = {58--66},
  publisher    = {Elsevier},
  series       = {Journal of Biotechnology},
  title        = {Cryogel-supported titanate nanotubes for waste treatment: Impact on methane production and bio-fertilizer quality.},
  url          = {http://dx.doi.org/10.1016/j.jbiotec.2015.05.014},
  volume       = {207},
  year         = {2015},
}