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Biogas - Carbon Nitrogen Ratios for various Materials
Carbon - Nitrogen ratios for materials actual for biogas production
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Carbon - Nitrogen ratios for various materials are indicated below:
| Type of Material | Carbon - Nitrogen Ratio |
| Alfalfa hay | 18 : 1 |
| Bagasse | 150 : 1 |
| Cichen manure | 25 : 1 |
| Clover | 2.7 : 1 |
| Cow dung | 25 : 1 |
| Cow urine | 0.8 : 1 |
| Grass clippings | 12 : 1 |
| Kitchen refuse | 6 - 10 : 1 |
| Lucerne | 2 : 1 |
| Pig droppings | 20 : 1 |
| Pig urine | 6 : 1 |
| Potato tops | 25 : 1 |
| Sawdust | 200 - 500 : 1 |
| Seaweed | 80 : 1 |
| Straw | 60 - 200 : 1 |
| Sewage sludge | 13 : 1 |
| Silage liquor | 11 : 1 |
| Slaughterhouse wastes | 3 - 4 : 1 |
When Carbon-Nitrogen ratio exceeds approx. 30, the biogas production starts diminishing.
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