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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad de Antioquia
2021
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| Online Access: | https://www.redalyc.org/articulo.oa?id=43068839006 https://www.redalyc.org/journal/430/43068839006/ https://www.redalyc.org/journal/430/43068839006/html/ https://www.redalyc.org/journal/430/43068839006/43068839006.epub https://www.redalyc.org/journal/430/43068839006/movil |
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Table of Contents:
- Speciation of iron, nickel and cobalt in the anaerobic biodegradation of rice straw Aimeé González-Suárez Ileana Pereda-Reyes Deny Oliva-Merencio Silvio Jacinto Montalvo-Martínez Ingeniería Biogas metals mineral productivity waste treatment The bioavailability of Fe, Ni and Co and its impact on the mono-digestion of rice straw with addition of a natural nutrient source were assessed. The chemical forms and the degree of bioavailability of Fe, Ni and Co were investigated in two reactors during 311 days of experimentation at 37°C. The reactor (R2) was supplemented with 1 g/L of mineral once a week. The control reactor R1 was limited in mineral during the study. The greatest methane yield of 238 mL/g VS was obtained with mineral supply with an increment of 45% respect to reactor without metals (164 mL/g VS). The sequential extraction confirmed that 70, 88 and 75% of Fe, Ni and Co were mainly in bioavailable forms (interchangeable and carbonate), respectively, with mineral supply in R2. Fe and Co were mainly associated to the carbonate and oxidizable fractions (43% and 41% respectively), while the Ni concentrations were not detected during the experimentation. As a result, the methane yield in R2 increased by 45%, with a potential bioavailability (Ni ˃ Co ˃ Fe) higher compared to control reactor (Co ˃ Fe). Trace elements deficit in R1 result in the reduction of metal-binding forms until the end of experiment, with a negative impact on methanogenic community. 2021 artículo científico 0120-6230 https://www.redalyc.org/articulo.oa?id=43068839006 https://www.redalyc.org/journal/430/43068839006/ https://www.redalyc.org/journal/430/43068839006/html/ https://www.redalyc.org/journal/430/43068839006/43068839006.epub https://www.redalyc.org/journal/430/43068839006/movil 10.17533/udea.redin.20200366 en http://www.redalyc.org/revista.oa?id=430 Revista Facultad de Ingeniería Universidad de Antioquia application/pdf Universidad de Antioquia Revista Facultad de Ingeniería Universidad de Antioquia (Colombia) Num.101