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Effect of carbon source and metal toxicity for potential acid mine drainage (AMD) treatment with an anaerobic sludge using sulfate-reduction
- Source :
- Water Science and Technology, Vol 83, Iss 11, Pp 2669-2677 (2021)
- Publication Year :
- 2021
- Publisher :
- IWA Publishing, 2021.
-
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 suitable electron donor since it favors sulfidogenesis. Finally, copper concentrations above 15 mg/L inhibited metabolic activity in the toxicity bioassays. HIGHLIGHTS The influence of organic matter degradation and copper toxicity was assessed.; Potential application of sulfate reducing bacteria (SRB) for acid mine drainage treatment was evaluated.; The highest sulfidogenic activity was observed with glucose as carbon source.; High copper concentration impacts sulfate removal and sulfide production.
- Subjects :
- Environmental Engineering
0208 environmental biotechnology
chemistry.chemical_element
Metal toxicity
02 engineering and technology
010501 environmental sciences
Environmental technology. Sanitary engineering
01 natural sciences
inhibitory concentration
chemistry.chemical_compound
Bioreactors
microbial competition
electron donors
medicine
Bioassay
Anaerobiosis
heavy metals
sulfate-reduction
TD1-1066
0105 earth and related environmental sciences
Water Science and Technology
percentage of electron equivalents
Ethanol
Sewage
Sulfates
Chemistry
Copper toxicity
medicine.disease
Acid mine drainage
Copper
Carbon
020801 environmental engineering
Activated sludge
Toxicity
Nuclear chemistry
Subjects
Details
- ISSN :
- 19969732 and 02731223
- Volume :
- 83
- Database :
- OpenAIRE
- Journal :
- Water Science and Technology
- Accession number :
- edsair.doi.dedup.....4d2e5d03d8da41ea0611a929b79fc5ea