Growth kinetics of Thiobacillus ferrooxidans in bioelectrochemical cell^①

来源期刊：中南大学学报(英文版)2004年第1期

论文作者：李宏煦 王淀佐 邱冠周 胡岳华

文章页码：36 - 40

Key words：Thiobacillus ferrooxidans; electrochemical cell; bioleaching; kinetics

Abstract: Thiobacillus ferrooxidansmight be the most important bacteria used in biometallurgy. The foundation way of its growth process is oxidizing ferrous in order to obtain energy needed for metabolism, but the variation of ferrous concentration and mixed potential of the culture media would have crucial effect on the bacteria growth. Based on the charac teristics ofThiobacillusferrooxidansgrowth and redox potential of ferric and ferrous, an electrochemical cell was designe conventionally to study growth rule and the relationship between redox potential and bacteria growth was built up, an some growth kinetics ofThiobacillus ferrooxidanswere elucidated. It demonstrates that the variation of open potential of electrochemical cellΔEshows the growth tendency ofThiobacillusferrooxidans, at the initial growth stage, the value of ΔEincreases slowly, when at logistic growth stage, it increases drastically, and the growth rate of bacteria is linear with the oxidation rate of ferrous. The bacteria growth kinetics model is proposed using Monod and Michealis-Menten equation, and the kinetics parameters are got. The consistence of the measured and the calculated results proves that it is proper to use the proposed kinetics model and the electrochemical cell method to describe the growth rule ofThiobacillus ferrooxidans.