优势菌种浸取电解锰渣中锰的影响因素研究
Studies on effects of superiority strains on bioleaching of Mn from electrolytic manganese residues
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摘要: 采用电解锰废渣中分离出的一种锰抗性强的微生物Fusarium sp.浸取电解锰渣中的锰。研究了不同矿浆浓度、微生物生长活动、锰渣和培养基等对锰浸取效率的影响。结果表明，接种体积比为2%（v/v）时，矿浆浓度（m/v）对锰浸取效率影响显著，矿浆浓度过低（＜2%）或者过高（＞10%）对锰浸取效率都有不利影响。矿浆浓度为10%时锰浸取效率最高，达80%以上；微生物的生长活动对浸取过程有显著的影响；而锰渣的存在则能在一定程度上影响溶液的pH，进而影响锰浸取效率；培养基对锰浸取效率的贡献达50%左右。Abstract: The micro-organism named Fusarium sp.，which was separated from electrolytic manganese residues，has strong resistance of manganese. A series of microbioleaching experiments were performed using Fusarium sp. to extract manganese from electrolytic manganese residues. The effects of different factors such as pulp density， microbial growth and activity， electrolytic manganese residues and culture medium on the Mn bioleaching efficiency were studied. The results showed that the pulp densities had a significant influence on the Mn bioleaching efficiency when the inoculation volume ratio was 2% .The Mn bioleaching efficiency was inhibited when the pulp densities were too low (＜2%) or too high (＞10%) . The highest Mn bioleaching efficiency was obtained when the pulp density was 10%，and it reached more than 80%； microbial growth and activity had a significant impact on bioleaching process.The existence of electrolytic manganese residues affected the pH of the solution to some extent， thereby affecting the Mn bioleaching efficiency.The contribution of culture medium to Mn bioleaching efficiency was about 50%.
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