Continuous biological ferrous iron oxidation in a submerged membrane bioreactor
SCIE
SCOPUS
- Title
- Continuous biological ferrous iron oxidation in a submerged membrane bioreactor
- Authors
- Park, D; Lee, DS; Park, JM
- Date Issued
- 2005-01
- Publisher
- I W A PUBLISHING
- Abstract
- Microbial oxidation of ferrous iron may be available alternative method of producing ferric iron, which is a reagent used for removal of H2S from biogas. In this study, a submerged membrane bioreactor (MBR) system was employed to oxidize ferrous iron to ferric iron. In the submerged MBR system, we could keep high concentration of iron-oxidizing bacteria and high oxidation rate of ferrous iron. There was membrane fouling caused by chemical precipitates such as K-jarosite and ferric phosphate. However, a strong acidity (pH 1.75) of solution and low ferrous iron concentration (below 3000 mg/l) significantly reduced the fouling of membrane module during the bioreactor operation. A fouled membrane module could be easily regenerated with a 1 M of sulfuric acid solution. In conclusion, the submerged MBR could be used for high-density culture of iron-oxidizing bacteria and for continuous ferrous iron oxidation. As far as our knowledge concerns, this is the first study on the application of a submerged MBR to high acidic conditions (below pH 2).
- Keywords
- H2S removal; iron-oxidizing bacteria; jarosite; submerged membrane bioreactor; THIOBACILLUS-FERROOXIDANS; KINETICS; BIOFILM; DRAINAGE; SULFATE; CELLS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/24524
- DOI
- 10.2166/wst.2005.0622
- ISSN
- 0273-1223
- Article Type
- Article
- Citation
- WATER SCIENCE AND TECHNOLOGY, vol. 51, no. 6-7, page. 59 - 68, 2005-01
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