The C:N ratio and methane production of coffee pulp
Anaerobic digestion is essentially a biological reaction. The microbes (acid and methane formers) like any other living flora require specific substrates and other essential nutrients for their activity. The substrate is normally carbon and the nutrients like nitrogen and phosphorus. Due to the important role that nitrogen plays in anaerobic digestion and the variability of the C/N ratio in the organic waste, this study was undertaken to determine the effects of C:N ratio on gas production and to optimize the C:N ratio for maximum gas yield. An experiment was conducted with coffee pulp as a primary substrate and cowdung as the supporting medium. Different C:N ratios viz., 20:1, 25:1, 30:1, and 35:1 were taken for the experimental study. The C:N ratio in the feed was altered by adding reagent grade dextrose. It was found that the C:N ratio of 30:1 with the experimental fermentor containing 25 total solids as substrate concentration was found to be optimum and maximum yield of methane was also observed. The gas yield was found to be less in C:N ratios below and above the reported ratio (30:1)
| Main Authors: | , , |
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| Format: | biblioteca |
| Published: |
1986
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| Subjects: | COFFEA ARABICA, PULPA, METANO, COMPOSICION, CARBON, NITROGENO, |
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