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Development of an optimal medium for continuous ferrous iron oxidation by immobilized Acidothiobacillus ferrooxidans cells

Title
Development of an optimal medium for continuous ferrous iron oxidation by immobilized Acidothiobacillus ferrooxidans cells
Authors
Kim, TWKim, CJChang, YKRyu, HWCho, KS
Ewha Authors
조경숙
SCOPUS Author ID
조경숙scopus
Issue Date
2002
Journal Title
BIOTECHNOLOGY PROGRESS
ISSN
8756-7938JCR Link
Citation
vol. 18, no. 4, pp. 752 - 759
Publisher
AMER CHEMICAL SOC
Indexed
SCI; SCIE; SCOPUS WOS
Abstract
This study was aimed at developing an immobilized bioreactor system in which long-term continuous ferrous iron oxidation can be realized with no formation of jarosite, which causes clogging of support pores and reactor lines. For this purpose, a medium with no jarosite formation was developed first by selecting optimal nitrogen and phosphate sources and their concentrations. Then with the developed medium containing ammonium phosphate instead of ammonium sulfate and potassium phosphate, repeated batch and continuous operations of ferrous iron oxidation by Acidothiobacillus ferrooxidans cells immobilized in a depth filter were successfully performed for an extended period of time. For about 510 h of operation including 450 h of continuous operation at dilution rates of 0.1, 0.2, and 0.3 h(-1), no formation of jarosite and thus no clogging of the reactor system were observed. The maximum ferrous iron oxidation rate was as high as 2.6 g/(L(.)h) at a dilution rate of 0.3 h(-1).
DOI
10.1021/bp020289j
Appears in Collections:
엘텍공과대학 > 환경공학전공 > Journal papers
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