Advanced

Biological reduction of hexavalent chromium - A field study

Ekenberg, Martin LU ; Martander, H and Welander, T (2005) In Water Environment Research 77(4). p.425-428
Abstract
When ferrochromium is produced at Vargon Alloys AB (Vargon, Sweden), an offgas dust is generated as a byproduct. A leachate that contains hexavalent chromium (Cr6+) is formed when rainwater percolates through the dust deposit. In this study, Cr6+ in the leachate was reduced to trivalent chromium (Cr3+) by biological treatment in a biofilm process operated under anaerobic conditions. The reactor volume was 26 m(3) and it was filled with 16 m(3) plastic packing. Acetic acid was added as an electron donor. The Cr6+ Was reduced from 10 to 20 mg/L to below 0.03 mg/L when the reactor was operated at a hydraulic retention time of 11 hours. The reduction activity in the process gradually decreased as the water temperature dropped below 10 degrees... (More)
When ferrochromium is produced at Vargon Alloys AB (Vargon, Sweden), an offgas dust is generated as a byproduct. A leachate that contains hexavalent chromium (Cr6+) is formed when rainwater percolates through the dust deposit. In this study, Cr6+ in the leachate was reduced to trivalent chromium (Cr3+) by biological treatment in a biofilm process operated under anaerobic conditions. The reactor volume was 26 m(3) and it was filled with 16 m(3) plastic packing. Acetic acid was added as an electron donor. The Cr6+ Was reduced from 10 to 20 mg/L to below 0.03 mg/L when the reactor was operated at a hydraulic retention time of 11 hours. The reduction activity in the process gradually decreased as the water temperature dropped below 10 degrees C. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
process, biofilm, biological treatment, hexavalent chromium, chromate reduction, suspended carriers, packed bed
in
Water Environment Research
volume
77
issue
4
pages
425 - 428
publisher
Water Environment Federation
external identifiers
  • wos:000230519800015
  • scopus:22244483750
ISSN
1061-4303
DOI
10.2175/106143005X52175
language
English
LU publication?
yes
id
980db877-19a3-4a18-9e35-5ab052ed73a6 (old id 232435)
date added to LUP
2007-08-06 14:19:14
date last changed
2017-01-01 06:58:52
@article{980db877-19a3-4a18-9e35-5ab052ed73a6,
  abstract     = {When ferrochromium is produced at Vargon Alloys AB (Vargon, Sweden), an offgas dust is generated as a byproduct. A leachate that contains hexavalent chromium (Cr6+) is formed when rainwater percolates through the dust deposit. In this study, Cr6+ in the leachate was reduced to trivalent chromium (Cr3+) by biological treatment in a biofilm process operated under anaerobic conditions. The reactor volume was 26 m(3) and it was filled with 16 m(3) plastic packing. Acetic acid was added as an electron donor. The Cr6+ Was reduced from 10 to 20 mg/L to below 0.03 mg/L when the reactor was operated at a hydraulic retention time of 11 hours. The reduction activity in the process gradually decreased as the water temperature dropped below 10 degrees C.},
  author       = {Ekenberg, Martin and Martander, H and Welander, T},
  issn         = {1061-4303},
  keyword      = {process,biofilm,biological treatment,hexavalent chromium,chromate reduction,suspended carriers,packed bed},
  language     = {eng},
  number       = {4},
  pages        = {425--428},
  publisher    = {Water Environment Federation},
  series       = {Water Environment Research},
  title        = {Biological reduction of hexavalent chromium - A field study},
  url          = {http://dx.doi.org/10.2175/106143005X52175},
  volume       = {77},
  year         = {2005},
}