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Design of a bioprocess for metal and sulfate removal from acid mine drainage
- Source :
- Hydrometallurgy. 180:72-77
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- The high levels of sulfate and the metals in acid mine drainages generate important environmental problems. This paper describes the synergistic combination of a biosorption process and a new sulfate removal process. The treatment for the elimination of metals by biosorption with a Bacillus strain allowed reducing the high metal concentrations that had a toxic effect on the sulfate-reducing bacteria (SRB). On the other hand, the sulfate removal process used a microbial sulfate-reducing halotolerant consortium, which was able to reduce the sulfate concentration using low-cost organic substrates such as spirulina, cellulose and industrial starch. Independent of substrate present in the culture medium, the SRB was the predominant group. The sulfate-reducing consortium was cultured on a bench-scale upflow anaerobic packed bed bioreactor filled with Celite R-635. It was possible to reduce the concentration of sulfate in the culture medium in batch or semi-continuous operation. This integrated process is an inexpensive alternative for the elimination of metals by biosortion and the elimination of sulfate using a sulfate-reducing consortium.
- Subjects :
- Packed bed
Chemistry
0208 environmental biotechnology
Metals and Alloys
Biosorption
02 engineering and technology
010501 environmental sciences
Acid mine drainage
Pulp and paper industry
01 natural sciences
Industrial and Manufacturing Engineering
020801 environmental engineering
chemistry.chemical_compound
Materials Chemistry
Bioreactor
Sulfate-reducing bacteria
Cellulose
Bioprocess
Sulfate
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 0304386X
- Volume :
- 180
- Database :
- OpenAIRE
- Journal :
- Hydrometallurgy
- Accession number :
- edsair.doi...........33abdfb4e7f72668f7079e2f09f5fd07