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Potential of combining mechanical and physicochemical municipal wastewater pre-treatment with direct membrane filtration

Hey, Tobias LU ; Väänänen, Janne LU ; Heinen, Nicolas; la Cour Jansen, Jes LU and Jönsson, Karin LU (2016) In Environmental Technology
Abstract

At a full-scale wastewater treatment plant, raw municipal wastewater from the sand trap outlet was mechanically and physicochemically pre-treated before microfiltration (MF) in a large pilot-scale study. MF was performed using a low transmembrane pressure (0.03 bar) without backflushing for up to 159 h (∼6.6 d). Pre-filtration ensured stable MF operation compared with the direct application of raw wastewater on the membrane. The combination of physicochemical pre-treatment, such as coagulation, flocculation, and microsieving, with MF meets the European and Swedish discharge limits for small- and medium-sized wastewater treatment plants (WWTPs). The specific electricity footprint was 0.3–0.4 kWh·m−3, which is an improvement... (More)

At a full-scale wastewater treatment plant, raw municipal wastewater from the sand trap outlet was mechanically and physicochemically pre-treated before microfiltration (MF) in a large pilot-scale study. MF was performed using a low transmembrane pressure (0.03 bar) without backflushing for up to 159 h (∼6.6 d). Pre-filtration ensured stable MF operation compared with the direct application of raw wastewater on the membrane. The combination of physicochemical pre-treatment, such as coagulation, flocculation, and microsieving, with MF meets the European and Swedish discharge limits for small- and medium-sized wastewater treatment plants (WWTPs). The specific electricity footprint was 0.3–0.4 kWh·m−3, which is an improvement compared to the median footprint of 0.75 kWh·m−3 found in 105 traditional Swedish WWTPs with sizes of 1500–10,000 person equivalents. Furthermore, the biological treatment step can be omitted, and the risk of releasing greenhouse gases was eliminated. The investigated wastewater treatment process required less space than conventional wastewater treatment processes, and more carbon was made available for biogas production.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
Direct membrane filtration, energy savings, low transmembrane pressure, pre-treatment, wastewater treatment
in
Environmental Technology
pages
8 pages
publisher
Selper Ltd
external identifiers
  • Scopus:84973167291
ISSN
0959-3330
DOI
10.1080/09593330.2016.1186746
language
English
LU publication?
yes
id
5450685c-a34f-4c40-83df-ffd4e0ec3cd7
date added to LUP
2016-07-08 09:01:08
date last changed
2016-09-20 03:09:04
@misc{5450685c-a34f-4c40-83df-ffd4e0ec3cd7,
  abstract     = {<p>At a full-scale wastewater treatment plant, raw municipal wastewater from the sand trap outlet was mechanically and physicochemically pre-treated before microfiltration (MF) in a large pilot-scale study. MF was performed using a low transmembrane pressure (0.03 bar) without backflushing for up to 159 h (∼6.6 d). Pre-filtration ensured stable MF operation compared with the direct application of raw wastewater on the membrane. The combination of physicochemical pre-treatment, such as coagulation, flocculation, and microsieving, with MF meets the European and Swedish discharge limits for small- and medium-sized wastewater treatment plants (WWTPs). The specific electricity footprint was 0.3–0.4 kWh·m<sup>−3</sup>, which is an improvement compared to the median footprint of 0.75 kWh·m<sup>−3</sup> found in 105 traditional Swedish WWTPs with sizes of 1500–10,000 person equivalents. Furthermore, the biological treatment step can be omitted, and the risk of releasing greenhouse gases was eliminated. The investigated wastewater treatment process required less space than conventional wastewater treatment processes, and more carbon was made available for biogas production.</p>},
  author       = {Hey, Tobias and Väänänen, Janne and Heinen, Nicolas and la Cour Jansen, Jes and Jönsson, Karin},
  issn         = {0959-3330},
  keyword      = {Direct membrane filtration,energy savings,low transmembrane pressure,pre-treatment,wastewater treatment},
  language     = {eng},
  month        = {06},
  pages        = {8},
  publisher    = {ARRAY(0x93c01f8)},
  series       = {Environmental Technology},
  title        = {Potential of combining mechanical and physicochemical municipal wastewater pre-treatment with direct membrane filtration},
  url          = {http://dx.doi.org/10.1080/09593330.2016.1186746},
  year         = {2016},
}