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
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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