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Evaluation of direct membrane filtration and direct forward osmosis as concepts for compact and energy-positive municipal wastewater treatment

Hey, Tobias LU ; Bajraktari, Niada; Davidsson, Åsa LU ; Vogel, Jörg; Madsen, Henrik Tækker; Hélix-Nielsen, Claus; Jansen, Jes la Cour LU and Jönsson, Karin LU (2018) In Environmental Technology 39(3). p.264-276
Abstract

Municipal wastewater treatment commonly involves mechanical, biological and chemical treatment steps to protect humans and the environment from adverse effects. Membrane technology has gained increasing attention as an alternative to conventional wastewater treatment due to increased urbanization. Among the available membrane technologies, microfiltration (MF) and forward osmosis (FO) have been selected for this study due to their specific characteristics, such as compactness and efficient removal of particles. In this study, two treatment concepts were evaluated with regard to their specific electricity, energy and area demands. Both concepts would fulfil the Swedish discharge demands for small- and medium-sized wastewater treatment... (More)

Municipal wastewater treatment commonly involves mechanical, biological and chemical treatment steps to protect humans and the environment from adverse effects. Membrane technology has gained increasing attention as an alternative to conventional wastewater treatment due to increased urbanization. Among the available membrane technologies, microfiltration (MF) and forward osmosis (FO) have been selected for this study due to their specific characteristics, such as compactness and efficient removal of particles. In this study, two treatment concepts were evaluated with regard to their specific electricity, energy and area demands. Both concepts would fulfil the Swedish discharge demands for small- and medium-sized wastewater treatment plants at full scale: (1) direct MF and (2) direct FO with seawater as the draw solution. The framework of this study is based on a combination of data obtained from bench- and pilot-scale experiments applying direct MF and FO, respectively. Additionally, available complementary data from a Swedish full-scale wastewater treatment plant and the literature were used to evaluate the concepts in depth. The results of this study indicate that both concepts are net positive with respect to electricity and energy, as more biogas can be produced compared to that using conventional wastewater treatment. Furthermore, the specific area demand is significantly reduced. This study demonstrates that municipal wastewater could be treated in a more energy- and area-efficient manner with techniques that are already commercially available and with future membrane technology.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Biogas production, forward osmosis, membrane filtration, seawater, wastewater treatment
in
Environmental Technology
volume
39
issue
3
pages
264 - 276
publisher
Selper Ltd
external identifiers
  • scopus:85015150954
ISSN
0959-3330
DOI
10.1080/09593330.2017.1298677
language
English
LU publication?
yes
id
caf75e58-1a19-45d8-8464-162efb937a9b
date added to LUP
2017-03-29 12:25:04
date last changed
2018-05-06 04:32:10
@article{caf75e58-1a19-45d8-8464-162efb937a9b,
  abstract     = {<p>Municipal wastewater treatment commonly involves mechanical, biological and chemical treatment steps to protect humans and the environment from adverse effects. Membrane technology has gained increasing attention as an alternative to conventional wastewater treatment due to increased urbanization. Among the available membrane technologies, microfiltration (MF) and forward osmosis (FO) have been selected for this study due to their specific characteristics, such as compactness and efficient removal of particles. In this study, two treatment concepts were evaluated with regard to their specific electricity, energy and area demands. Both concepts would fulfil the Swedish discharge demands for small- and medium-sized wastewater treatment plants at full scale: (1) direct MF and (2) direct FO with seawater as the draw solution. The framework of this study is based on a combination of data obtained from bench- and pilot-scale experiments applying direct MF and FO, respectively. Additionally, available complementary data from a Swedish full-scale wastewater treatment plant and the literature were used to evaluate the concepts in depth. The results of this study indicate that both concepts are net positive with respect to electricity and energy, as more biogas can be produced compared to that using conventional wastewater treatment. Furthermore, the specific area demand is significantly reduced. This study demonstrates that municipal wastewater could be treated in a more energy- and area-efficient manner with techniques that are already commercially available and with future membrane technology.</p>},
  author       = {Hey, Tobias and Bajraktari, Niada and Davidsson, Åsa and Vogel, Jörg and Madsen, Henrik Tækker and Hélix-Nielsen, Claus and Jansen, Jes la Cour and Jönsson, Karin},
  issn         = {0959-3330},
  keyword      = {Biogas production,forward osmosis,membrane filtration,seawater,wastewater treatment},
  language     = {eng},
  number       = {3},
  pages        = {264--276},
  publisher    = {Selper Ltd},
  series       = {Environmental Technology},
  title        = {Evaluation of direct membrane filtration and direct forward osmosis as concepts for compact and energy-positive municipal wastewater treatment},
  url          = {http://dx.doi.org/10.1080/09593330.2017.1298677},
  volume       = {39},
  year         = {2018},
}