Effect of substrate concentrations on methane and hydrogen biogas production by anaerobic digestion of a cassava starch-based polymer
| Autor: | Eduardo de Rossi, Elisandro Pires Frigo, Thompson Ricardo Weiser Meier, Silvio César Sampaio, Paulo André Cremonez, Danielle Medina Rosa, Joel Gustavo Teleken, Edson Antonio Da Silva |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Acidogenesis Hydrogen 010405 organic chemistry Starch chemistry.chemical_element Pulp and paper industry 01 natural sciences Methane 0104 chemical sciences Anaerobic digestion chemistry.chemical_compound chemistry Biogas Agronomy and Crop Science Effluent 010606 plant biology & botany Hydrogen production |
| Zdroj: | Industrial Crops and Products. 151:112471 |
| ISSN: | 0926-6690 |
| DOI: | 10.1016/j.indcrop.2020.112471 |
| Popis: | This study aims to evaluate the two-phase anaerobic digestion process of a cassava starch-based polymer, determining the ideal organic load to obtain the best results in terms of removal of solids and production of methane and hydrogen. Two reactors were used: one with an agitation and mixing system for the acidogenic phase, and the other was a tubular reactor for the methanogenic phase, both with ascending flow and semi-continuous feeding, with the effluent from the acidogenic reactor conducted from the methanogenic reactor. The loads were defined as concentrations of 8, 10, 12, and 14 g L−1 (on a wet basis), having HRT of 5 days for the acidogenic reactor and 20 days for the methanogenic. The analysis of the results showed that the concentration of 10 g L−1 had the best results for hydrogen and methane production in acidogenic and methanogenic phases, presenting 19.9 mL gVS-1 and 249.1 mL gVS−1, respectively. This treatment also showed the highest levels of gases in the biogas (43.2 % hydrogen in the acidogenic phase, and 76.6 % methane in the methanogenic phase). In addition, it showed the highest volatile solid removal means, reaching 84.0 % in the methanogenic phase. Thus, the anaerobic biodigestion process in two phases for the degradation of the polymer based on cassava starch presents technical feasibility, with high methane and hydrogen production; and concentrations above 10 g L−1, under the test conditions, cause destabilization in the reactors by the great formation of volatile acids and consequent reduction in the stability of microbiological cultures. |
| Databáze: | OpenAIRE |
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