fulltext.study @t Gmail

Reduction of bromate in a biological activated carbon filter under high bulk dissolved oxygen conditions and characterization of bromate-reducing isolates

Paper ID Volume ID Publish Year Pages File Format Full-Text
3566 175 2012 7 PDF Available
Title
Reduction of bromate in a biological activated carbon filter under high bulk dissolved oxygen conditions and characterization of bromate-reducing isolates
Abstract

A biological activated carbon (BAC) filter was constructed using BAC from a pilot system that exhibited the ability to reduce bromate (BrO3−) and two BrO3−-reducing bacteria were isolated and characterized. The BAC filter could almost completely reduce BrO3− (60 μgBr/L) to bromide (Br−) at an influent dissolved oxygen (DO) level of approximately 8.0 mg/L and an empty bed contact time of 30 ± 2 min using acetate as the electron donor shortly after the start-up. Phylogenetic analysis of the 16S rRNA gene sequences of a biological sample from the BAC filter showed that among the six detected orders, Rhodocyclales- and Burkholderiales-related microorganisms were dominant and Rhodocyclaceae- and Comamonadaceae-related microorganisms may play a role in BrO3− reduction. Two isolated pure cultures, i.e. Sphingomonas sp. 4721 and Deinococcus sp. 4710, exhibited the ability to reduce BrO3− in the presence of NO3−. The result of this study clearly indicated that DO was a competitor of BrO3− as an electron acceptor while NO3− was not. Construction of a BAC filter which could restrict oxygen transfer within a biofilm still remains to be a challenge.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A BAC filter showed significant removal of bromate in the presence of high DO. ► Rhodocyclaceae/Comamonadaceae-related bacteria may play a role in BrO3− reduction. ► Two isolated strains exhibited BrO3− reducing ability in the presence of NO3−.

Keywords
Biofilters; Bromate-reducing bacteria; Dissolved oxygen; Biofilms; Biotransformation; Characterization
First Page Preview
Reduction of bromate in a biological activated carbon filter under high bulk dissolved oxygen conditions and characterization of bromate-reducing isolates
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 65, 15 June 2012, Pages 44–50
Authors
, , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us