Effect of carbon source and metal toxicity for potential acid mine drainage (AMD) treatment with an anaerobic sludge using sulfate-reduction.

Water Science and Technology : a Journal of the International Association on Water Pollution Research
C D LoretoF J Almendariz

Abstract

This study compares sulfate-reduction performance in an anaerobic sludge with different carbon sources (ethanol, acetate, and glucose). Also, the toxic effect of copper was evaluated to assess its feasibility for possible acid mine drainage (AMD) treatment. Serological bottles with 1.5 g VSS/L and 150 mL of basal medium (0.67 g COD/g SO42- at a 7-8 pH) were used to determine the percentage of electron equivalents, maximum specific methanogenic (SMA), and sulfide generation activities (SGA). The copper effect was evaluated in a previously activated sludge in batch bioassays containing different concentrations of copper (0-50 mg/L), 3 gVSS/L, and 150 mL of basal medium (0.67 g COD/g SO42-). Carbon source bioassays with glucose obtained the best results in terms of the SGA (1.73 ± 0.34 mg S2-/g VSS•d) and SMA (10.41 mg COD-CH4/g VSS•d). The electron flow in the presence of glucose also indicated that 21.29 ± 5.2% of the metabolic activity of the sludge was directed towards sulfidogenesis. Copper toxicity bioassays indicated that a considerable decline in metabolic activity occurs above 10 mg/L. The 20%IC, 50%IC, and 80%IC were 4.5, 14.94, and 35.31 mg Cu/L. Compared to the other carbon sources tested, glucose proved to be a suitab...Continue Reading

References

Jun 28, 2007·Environmental Science & Technology·Reyes Sierra-AlvarezMichael S Zhou
Aug 24, 2007·Environmental Toxicology and Chemistry·Song JinPatricia J S Colberg
Oct 31, 2007·Journal of Environmental Sciences (China)·Nusara SinbuathongDaniel Watts
Oct 4, 2012·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Irene Sánchez-AndreaJose L Sanz
May 2, 2018·The Science of the Total Environment·Sun Kyung Hwang, Eun Hea Jho
May 13, 2018·Journal of Environmental Management·Manoj KumarKannan Pakshirajan
Jul 16, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Ya-Nan Xu, Yinguang Chen
Dec 4, 2020·Journal of Hazardous Materials·Rachel Biancalana CostaDenise Bevilaqua

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