Resumen
Anaerobic digestion is an alternative to reduce pollution problems due to the open sky disposal of waste, such as manures and agricultural residues; besides, it is an option for the generation of alternative energies due to biogas production. The aim of this work was to evaluate the co-digestion of cattle waste with tomato crop residues. The experimental design was completely randomized under a 2 × 2 factorial arrangement, considering two levels of manure (20 and 50 %) and two pH initial levels (6.8 and 7.5). It was found that by adjusting the pH to 7.5 using 20 or 50 % manure, the total production of biogas and methane increased 100 %, compared to that obtained in di-gesters starting at pH 6.8. In digesters where 50 % of manure and 50 % of tomato crop residues were used, the methane content reached 45 %, which is the minimum to be used as combustible. The use of 20 % manure and 80% tomato crop residues produced 35 to 37 % methane. The 50:50 proportion manure:tomato residues best treatment was in with pH adjust at 7.5 . The resulting digestate did not present phytotoxicity in the test with lettuce seeds, and its coliform and salmonella was below those indicated in standard NOM 004-SEMARNAT.
Título traducido de la contribución | Biogas production through co-digestion of cattle waste and agricultural residues of tomato cultivation (Solanum lycopersicum l.) |
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Idioma original | Español |
Páginas (desde-hasta) | 529-539 |
Número de páginas | 11 |
Publicación | Revista Internacional de Contaminacion Ambiental |
Volumen | 36 |
N.º | 3 |
DOI | |
Estado | Publicada - 2020 |
Palabras clave
- Alternative energies
- Digestate
- Methane