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

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 439 ◽  
Author(s):  
Yanrong Dong ◽  
Junzhen Di ◽  
Xianjun Wang ◽  
Lindan Xue ◽  
Zhenhua Yang ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Treatment Effect ◽  
Mine Drainage ◽  
Ph Value ◽  
Oxygen Demand ◽  
Sulfate Reducing ◽  
Acid Mine ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential ◽  
Geographic Origins

In order to solve the problem of pollution of acid mine drainage (AMD), such as low pH value and being rich in SO42−, 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 SO42−, Fe2+ and Mn2+ were 70.13%, 83.82% and 59.43%, respectively, and the average chemical oxygen demand (COD) emission was 555.48 mg/L.

scholarly journals Study on the Effectiveness of Sulfate-Reducing Bacteria Combined with Coal Gangue in Repairing Acid Mine Drainage Containing Fe and Mn

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 995 ◽  
Author(s):  
Yanrong Dong ◽  
Junzhen Di ◽  
Zhenhua Yang ◽  
Yuanling Zhang ◽  
Xianjun Wang ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Spontaneous Combustion ◽  
Mine Drainage ◽  
Ph Value ◽  
Oxygen Demand ◽  
Sulfate Reducing Bacteria ◽  
Coal Gangue ◽  
Sulfate Reducing ◽  
Acid Mine ◽  
Reducing Bacteria

In view of the characteristics of the high content of SO42−, Fe2+ and Mn2+ in acid mine drainage (AMD) and low pH value, based on adsorption and biological methods, coal gangue was combined with sulfate-reducing bacteria (SRB). On this basis, four dynamic columns, including Column 1 (SRB combined with spontaneous combustion gangue from the Gaode coal mine), Column 2 (SRB combined with spontaneous combustion gangue from Haizhou), Column 3 (SRB combined with gangue from Haizhou), and Column 4 (SRB combined with gangue from Shanxi), were constructed. The efficacy of four columns was compared by the inflow of AMD with different pollution load. Results showed that the repair effect of four columns was: Column 3 > Column 2 > Column 1 > Column 4. In the second stage of the experiment, the repair effect of Column 3 was the best. The average effluent pH value and oxidation reduction potential (ORP) value were 9.09 and –262.83 mV, the highest removal percentages of chemical oxygen demand (COD) and SO42− were 84.41% and 72.73%, and the average removal percentages of Fe2+, Mn2+ were 98.70% and 79.97%, respectively. At the end of the experiment, when deionized water was injected, the fixed effect of AMD in the four columns was stable and no secondary release appeared.

scholarly journals Study on treatment of acid mine drainage by nano zero-valent iron synergistic with SRB immobilized particles

2020 ◽  
Vol 26 (5) ◽  
pp. 200333-0
Author(s):  
Xianjun Wang ◽  
Junzhen Di ◽  
Bing Liang ◽  
Yu Yang ◽  
Yanrong Dong ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Ph Value ◽  
Zero Valent Iron ◽  
Main Body ◽  
Matrix Component ◽  
Sulfate Reducing ◽  
Acid Mine ◽  
Nano Zero Valent Iron ◽  
Reducing Bacteria

In view of the serious pollution and high cost of treatment of acid mine drainage (AMD) in coal mine, the polyving akohol (PVA) and boric acid embedding cross-linking method was used to prepare the immobilized particles for treatment of AMD with sulfate-reducing bacteria (SRB) and nano zero-valent iron (nano-Fe<sup>0</sup>) as the main body. In order to explore the specification and dosage of each matrix component of immobilized particle, a series of single factor tests and orthogonal tests were carried out to determine the optimal ratio of each matrix component. The results shows that when the SRB quality additive percentage was 30%, the nano-Fe<sup>0</sup> dosage was 4%, the corn cob particle size was 60 mesh and the dosage was 3%, the SO<sub>4</sub><sup>2-</sup>, Cr<sup>6+</sup> and Cr<sup>3+</sup> removal rates were 82.99%, 99.78% and 38.78%, respectively, the TFe and COD release rates were 4.26 mg·L<sup>-1</sup> and 1,033.4 mg·L<sup>-1</sup>, respectively, and the pH value was 8.04, and the treatment effect was the best.

scholarly journals Experimental study on the treatment of acid mine drainage by modified corncob fixed SRB sludge particles

RSC Advances ◽  
2019 ◽  
Vol 9 (33) ◽  
pp. 19016-19030 ◽  
Author(s):  
Yan-Rong Dong ◽  
Jun-Zhen Di ◽  
Ming-Xin Wang ◽  
Ya-Dong Ren
Keyword(s):  
Experimental Study ◽  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Cost Effective ◽  
Sulfate Reducing Bacteria ◽  
Sulfate Reducing ◽  
Acid Mine ◽  
Effective System ◽  
Reducing Bacteria

A cost-effective system for acid mine drainage removal was developed with the key role of alkaline H2O2 modified corncob and sulfate reducing bacteria.

scholarly journals Effect of COD/SO42- Supply Ratio Variations of Sulfate-Reducing Bacteria of Sulphood Raise in Acid Mine Drainage

2018 ◽  
Vol 73 ◽  
pp. 05009
Author(s):  
Hardyanti Nurandani ◽  
Utomo Sudarno ◽  
Oktaviana Angelica ◽  
Serafina Katrin ◽  
Junaidi Junaidi
Keyword(s):  
Acid Mine Drainage ◽  
Sulphur Dioxide ◽  
Mine Drainage ◽  
Removal Rate ◽  
Batch Reactor ◽  
Septic Tank ◽  
Mining Activities ◽  
Sulfate Reducing ◽  
Acid Mine ◽  
Sulfate Removal

Sulphur dioxide gas is one of most contaminating gas in the air. Sulphur gas can be produced by mining activities. Sulphur gas will be harmful if bond with CO2 to form as Sulphur Dioxide. To reduce the Sulphur Dioxide gas concentration we must inhibite the sulphur gas formation from mining activities. The inhibition of sulphur gas could be done by reduce the sulphate concentration in acid mine drainage. One of important factor that influencing the reduce of sulphate is COD/SO42- ratio. The effect of COD/SO42- ratio on bacterial growth and sulfate removal process can be investigated with anaerobic batch reactor. The laundry septic tank sediments were inoculated on an anaerobic batch reactor which were contacted with artificial coal acid mine water wastes with 1000 sulfate concentrations and 2000 mg SO42- /L. In an anaerobic batch reactor there are five reactors with variations of COD / SO42-1.0, 1.5, 2.0, 4.0, and 8.0 ratios. Efficiency ratio and the best sulfate removal rate is in reactor ratio 2.0 with value efficiency of 46.58% and a reduction rate of 29.128 mg / L.day in an anaerobic batch reactor. The efficiency of the removal rate decreased when the COD / SO42->2.0 ratio decreased. The fastest pH decline was in the COD/SO42-8.0 ratio variation in the anaerobic batch reactor and. The COD / SO42-ratio can help the sulfate reduction process in the optimum value by affecting the sulfate-reducing bacterial metabolism in the balance of the acceptor and the electron donor.

scholarly journals Three-year survey of sulfate-reducing bacteria community structure in Carnoulès acid mine drainage (France), highly contaminated by arsenic

2012 ◽  
Vol 83 (3) ◽  
pp. 724-737 ◽  
Author(s):  
Ludovic Giloteaux ◽  
Robert Duran ◽  
Corinne Casiot ◽  
Odile Bruneel ◽  
Françoise Elbaz-Poulichet ◽  
...  
Keyword(s):  
Community Structure ◽  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Sulfate Reducing Bacteria ◽  
Sulfate Reducing ◽  
Acid Mine ◽  
Bacteria Community Structure ◽  
Reducing Bacteria

Biological treatment of heavy metals in acid mine drainage using sulfate reducing bioreactors

2006 ◽  
Vol 54 (2) ◽  
pp. 179-185 ◽  
Author(s):  
R. Sierra-Alvarez ◽  
S. Karri ◽  
S. Freeman ◽  
J.A. Field
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Acid Mine Drainage ◽  
Biological Treatment ◽  
Mine Drainage ◽  
Metal Removal ◽  
Abandoned Mines ◽  
Synthetic Wastewater ◽  
Sulfate Reducing ◽  
Acid Mine

The uncontrolled release of acid mine drainage (AMD) from abandoned mines and tailing piles threatens water resources in many sites worldwide. AMD introduces elevated concentrations of sulfate ions and dissolved heavy metals as well as high acidity levels to groundwater and receiving surface water. Anaerobic biological processes relying on the activity of sulfate reducing bacteria are being considered for the treatment of AMD and other heavy metal containing effluents. Biogenic sulfides form insoluble complexes with heavy metals resulting in their precipitation. The objective of this study was to investigate the remediation of AMD in sulfate reducing bioreactors inoculated with anaerobic granular sludge and fed with an influent containing ethanol. Biological treatment of an acidic (pH 4.0) synthetic AMD containing high concentrations of heavy metals (100 mg Cu2+l−1; 10 mg Ni2+l−1, 10 mg Zn2+l−1) increased the effluent pH level to 7.0–7.2 and resulted in metal removal efficiencies exceeding 99.2%. The highest metal precipitation rates attained for Cu, Ni and Zn averaged 92.5, 14.6 and 15.8 mg metal l−1 of reactor d−1. The results of this work demonstrate that an ethanol-fed sulfidogenic reactor was highly effective to remove heavy metal contamination and neutralized the acidity of the synthetic wastewater.

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