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The effects of physicochemical wastewater treatment operations on forward osmosis

Hey, Tobias LU ; Bajraktari, Niada; Vogel, Jörg; Hélix Nielsen, Claus; la Cour Jansen, Jes LU and Jönsson, Karin LU (2016) In Environmental Technology
Abstract

Raw municipal wastewater from a full-scale wastewater treatment plant was physicochemically pretreated in a large pilot-scale system comprising coagulation, flocculation, microsieve and microfiltration operated in various configurations. The produced microsieve filtrates and microfiltration permeates were then concentrated using forward osmosis (FO). Aquaporin InsideTM FO membranes were used for both the microsieve filtrate and microfiltration permeates, and Hydration Technologies Inc.–thin-film composite membranes for the microfiltration permeate using only NaCl as the draw solution. The FO performance was evaluated in terms of the water flux, water flux decline and solute rejections of biochemical oxygen demand, and total... (More)

Raw municipal wastewater from a full-scale wastewater treatment plant was physicochemically pretreated in a large pilot-scale system comprising coagulation, flocculation, microsieve and microfiltration operated in various configurations. The produced microsieve filtrates and microfiltration permeates were then concentrated using forward osmosis (FO). Aquaporin InsideTM FO membranes were used for both the microsieve filtrate and microfiltration permeates, and Hydration Technologies Inc.–thin-film composite membranes for the microfiltration permeate using only NaCl as the draw solution. The FO performance was evaluated in terms of the water flux, water flux decline and solute rejections of biochemical oxygen demand, and total and soluble phosphorus. The obtained results were compared with the results of FO after only mechanical pretreatment. The FO permeates satisfied the Swedish discharge demands for small and medium-sized wastewater treatment plants. The study demonstrates that physicochemical pretreatment can improve the FO water flux by up to 20%. In contrast, the solute rejection decreases significantly compared to the FO-treated wastewater with mechanical pretreatment.

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author
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
Forward osmosis, microfiltration, microsieve, non-biological treatment, physicochemical pretreatment, wastewater treatment
in
Environmental Technology
pages
13 pages
publisher
Selper Ltd
external identifiers
  • scopus:84992332845
  • wos:000406560200003
ISSN
0959-3330
DOI
10.1080/09593330.2016.1246616
language
English
LU publication?
yes
id
80bba213-5cc6-4841-b70f-393d91a5c967
date added to LUP
2016-11-09 07:14:28
date last changed
2017-09-18 11:29:46
@article{80bba213-5cc6-4841-b70f-393d91a5c967,
  abstract     = {<p>Raw municipal wastewater from a full-scale wastewater treatment plant was physicochemically pretreated in a large pilot-scale system comprising coagulation, flocculation, microsieve and microfiltration operated in various configurations. The produced microsieve filtrates and microfiltration permeates were then concentrated using forward osmosis (FO). Aquaporin Inside<sup>TM</sup> FO membranes were used for both the microsieve filtrate and microfiltration permeates, and Hydration Technologies Inc.–thin-film composite membranes for the microfiltration permeate using only NaCl as the draw solution. The FO performance was evaluated in terms of the water flux, water flux decline and solute rejections of biochemical oxygen demand, and total and soluble phosphorus. The obtained results were compared with the results of FO after only mechanical pretreatment. The FO permeates satisfied the Swedish discharge demands for small and medium-sized wastewater treatment plants. The study demonstrates that physicochemical pretreatment can improve the FO water flux by up to 20%. In contrast, the solute rejection decreases significantly compared to the FO-treated wastewater with mechanical pretreatment.</p>},
  author       = {Hey, Tobias and Bajraktari, Niada and Vogel, Jörg and Hélix Nielsen, Claus and la Cour Jansen, Jes and Jönsson, Karin},
  issn         = {0959-3330},
  keyword      = {Forward osmosis,microfiltration,microsieve,non-biological treatment,physicochemical pretreatment,wastewater treatment},
  language     = {eng},
  month        = {10},
  pages        = {13},
  publisher    = {Selper Ltd},
  series       = {Environmental Technology},
  title        = {The effects of physicochemical wastewater treatment operations on forward osmosis},
  url          = {http://dx.doi.org/10.1080/09593330.2016.1246616},
  year         = {2016},
}