Growth and Bio-oxidation Fe~(2+) of a Strain of Moderate Thermophilic Bacteria

A moderate thermophilic bacterium was isolated from a spring,and the influencing factors of the moderate thermophile growth have been studied,such as element sulfur,growth temperature,pH value,the initial concentration of Fe2+ and Fe3+ etc.The experiments results show that the optimum conditions for growth of moderate thermophile are between 50~55℃ of temperature,pH at 1.5,and the initial concentration of Fe2+ and Fe3+ is in the range of 0.08~0.16mol/L,the moderate thermophile grow well and after 10 days the oxidation rate of Fe2+ is 87~99%,The ability of this strain to oxidize iron shows that it has a good prospective in bioleaching.