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Dynamic Experimental Study on Treatment of Acid Mine Drainage by Bacteria Supported in Natural Minerals

Yanrong Dong (), Junzhen Di (), Xianjun Wang (), Lindan Xue (), Zhenhua Yang (), Xuying Guo () and Mingwei Li ()
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Yanrong Dong: College of Civil Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China
Junzhen Di: College of Civil Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China
Xianjun Wang: College of Civil Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China
Lindan Xue: College of Civil Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China
Zhenhua Yang: College of Mining, Liaoning Technical University, Fuxin 123000, Liaoning, China
Xuying Guo: College of Science, Liaoning Technical University, Fuxin 123000, Liaoning, China
Mingwei Li: College of Civil Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China

Energies, 2020, vol. 13, issue 2, 1-14

Abstract: In order to solve the problem of pollution of acid mine drainage (AMD), such as low pH value and being rich in SO 4 2− , Fe and Mn pollution ions, etc., immobilized particles were prepared by using sugar cane-refining waste (bagasse), a natural composite mineral (called medical stone in China) and sulfate-reducing bacteria (SRB) as substrate materials, based on microbial immobilization technology. Medical stone is a kind of composite mineral with absorbability, non-toxicity and biological activity. The adsorption capacity of medical stone is different according to its geographic origins. Two dynamic columns were constructed with Column 1 filled by Fuxin’s medical stone-enhanced SRB immobilized particles, and Column 2 filled by Dengfeng’s medical stone-enhanced SRB immobilized particles as fillers. The treatment effect on AMD with SRB-immobilized particles enhanced by medical stone from different areas was compared. Results showed that Column 2 had better treatment effect on AMD. The average effluent pH value of Column 2 was 6.98, the average oxidation reduction potential (ORP) value was −70.17 mV, the average removal percentages of SO 4 2− , Fe 2+ and Mn 2+ were 70.13%, 83.82% and 59.43%, respectively, and the average chemical oxygen demand (COD) emission was 555.48 mg/L.

Keywords: acid mine drainage; medical stone; bagasse; sulfate-reducing bacteria; immobilized particle (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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