| Symbols | Descriptions and Units | Equations | |
|---|---|---|---|
| ṁin | Mass flow of fresh input slurrya (kg day-1) |  |
Eq.2 |
| ṁFM | Mass flow of fresh manurea | ||
| ṁMfact | Factor of mass fresh manure (0.6) | ||
| TSFM | Total solid of fresh manure (%) | ||
| TSin | Total solid of input slurry (%) equals to 7.5 | ||
| VD | Volume of digestion (m3) |
 
|
Eq.3 Eq.4 |
| hrt | Hydraulic retention time (day) equals to 40 | ||
| ϱin | Density of input slurry (kg m-3) equals to 1 | ||
| LR | Loading rate (kgvs m-3diester day-1) equals to ~1.5 | ||
| ṁVS | Mass flow of volatile solid of input (kgvs day-1) | ||
| Byield | Biogas yield (m3 year-1) |  |
Eq.5 |
| Bsum-rate | Biogas summer rate (m3 kgvs-1 in summer) | ||
| Bwin-rate | Biogas winter rate (m3 kgvs-1 in winter) | ||
| dsum | Summer days with an average temperature of 26ºC | ||
| dwin | Winter days with an average temperature of 15ºC | ||
| Bavailable | Biogas available (m3 year-1) |  |
Eq.6 |
| Bloss | Biogas loss (%) equals to 10 |
a Only faeces.
b Input slurry: mixed water and manure at a ratio of ~1.3 kg kg-1.