Anaerobic digester performance scenario parameters
| Parameter name . | Feedstock scenario . | Low AD . | Base AD . |
|---|---|---|---|
| Percent VSRa (% of influent VS) | Baseline | 55% | |
| Partial capacity | 61% | 69% | |
| Full capacity | 63% | 72% | |
| Biogas yieldb (standard m3/kg of VS destroyed) | Baseline | 1.1 | |
| Partial capacity | 0.94 | 1.1 | |
| Full capacity | 0.94 | 1.2 | |
| Flaring ratec | All | 20% | 10% |
| Biogas production (m3/day) | Baseline | 1.2 × 104 | |
| Partial capacity | 2.4 × 104 | 3.3 × 104 | |
| Full capacity | 3.8 × 104 | 5.3 × 104 | |
| Parameter name . | Feedstock scenario . | Low AD . | Base AD . |
|---|---|---|---|
| Percent VSRa (% of influent VS) | Baseline | 55% | |
| Partial capacity | 61% | 69% | |
| Full capacity | 63% | 72% | |
| Biogas yieldb (standard m3/kg of VS destroyed) | Baseline | 1.1 | |
| Partial capacity | 0.94 | 1.1 | |
| Full capacity | 0.94 | 1.2 | |
| Flaring ratec | All | 20% | 10% |
| Biogas production (m3/day) | Baseline | 1.2 × 104 | |
| Partial capacity | 2.4 × 104 | 3.3 × 104 | |
| Full capacity | 3.8 × 104 | 5.3 × 104 | |
aLow AD performance volatile solids reduction (VSR) assumes 50 percent for municipal solids, low end of range in Figure A-6 (Appleton & Rauch-Williams 2017), and 70 percent for SSO (11 percent reduction relative to Base AD VSR). VS, volatile solids.
bBiogas yield values for the base AD scenario were based on GPS-X model output (Hydromantis 2017). Low AD performance biogas yield was based on CAPDETWorks defaults (Harris et al. 1982).
cThe baseline scenario has an 18-percent flaring rate, which was used as the basis of the low AD performance scenario, rounded to 20 percent. The base AD performance scenario assumes that the availability of CHP should reduce the facilities flaring rate.