Abstract
Sixteen 1-L digesters were used to test four carbon-to-nitrogen ratios of 8. 4, 13. 9, 22. 2 and 27. 6 and four hydraulic retention times of 12, 18, 24 and 30 days on the efficiency of digester operation. Percent methane in the biogas and methane production were dependent on both carbon-to-nitrogen ratio and hydraulic retention times. Percent chemical oxygen demand reduction, volatile solids removal, total volatile acids concentrations, digester pH and amount of sodium hydroxide solution needed to control digester pH were dependent on hydraulic retention time only.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1274-1282 |
| Number of pages | 9 |
| Journal | Transactions of the American Society of Agricultural Engineers |
| Volume | 31 |
| Issue number | 4 |
| State | Published - Jul 1 1988 |