矿石之微生物脱磷机理的初步研究

The Studies on Dephosphorization of Phosphorus-Rich Rhodochrosite by Microorganisms

以生尘芽孢杆菌进行了微生物脱磷机理与应用的探索性研究。试验结果表明 :生尘芽孢杆菌脱磷必须经过两个步骤 :(1)通过产生有机酸降低溶液pH值使磷矿石中的磷溶出 ;(2 )当溶液中的磷达到一定浓度后微生物形成胞内聚磷酸盐。

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.