Biological reduction of hexavalent chromium - A field study
(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:
https://lup.lub.lu.se/record/232435
- author
- Ekenberg, Martin LU ; Martander, H and Welander, T
- organization
- publishing date
- 2005
- 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
- 2016-04-01 16:12:31
- date last changed
- 2022-01-28 18:06:43
@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}}, keywords = {{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}}, doi = {{10.2175/106143005X52175}}, volume = {{77}}, year = {{2005}}, }