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The Studies on Dephosphorization of Phosphorus-Rich Rhodochrosite by Microorganisms

ZHENG Shao-kui1, YANG Min1, GUAN Xiao-hui2, WEI De-zhou3, ZHANG Wei-qing3   

  1. 1. The Research Center for Eco-environment Science, Academy of China, Beijing 100085; 2. The Department of Applied Chemistry, Northeast Electricity College, Jilin 132012; 3. The College of Resource and Civil Engineering, Northeast University, Shenyang 100085
  • Received:2000-06-20 Revised:2000-06-20 Online:2000-06-20 Published:2000-06-20

Abstract: Manganese ore in China is rich in phosphorus which is often required to be removed in iron and steel industry. Biological dephosphorization was teste d in this study. Bacillus pulvifaciens and a kind of fungi were comp ared in te rms of organic acid production, and the former was found to be more effective fo r organic acid production and was used in the experiments. The dephosphoriza tion tests on an apatite ore were done in two steps: (1)Phosphate dissolution by lowering pH to 3 via organic acid formation; (2) Phosphate is uptaken by bacteria. The first step could be replaced by adding inorganic acid to adjusting pH.