Optimal start-up conditions for the efficient treatment of acid mine drainage using sulfate-reducing bioreactors based on physicochemical and microbiome analyses

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

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

E3S Web of Conferences ◽

10.1051/e3sconf/20187305009 ◽

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.

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

FEMS Microbiology Ecology ◽

10.1111/1574-6941.12028 ◽

2012 ◽

Vol 83 (3) ◽

pp. 724-737 ◽

Cited By ~ 30

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

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

Water Science & Technology ◽

10.2166/wst.2006.502 ◽

2006 ◽

Vol 54 (2) ◽

pp. 179-185 ◽

Cited By ~ 21

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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