Table 4
Performance of the biodigester for removal of key environmental contaminants
| Performance parameter | In | Out | Expected design efficiency (%) | Actual biodigester efficiency (%) |
|---|---|---|---|---|
| BOD5 (mg/L) | 960 ± 159 | 320 ± 27 | 71.7 | 66.7 |
 (mg/L) | 4,032 ± 624 | 1,312 ± 86 | 78 | 67.5 |
| TSS (mg/L) | 10,100 ± 428 | 2,860 ± 104 | 60.1 | 71.7 |
 (mg/L) | 189 ± 14 | 550 ± 18 | −145 | −191.0 |
| NH3 (mg/L) | 570 ± 85 | 315 ± 58 | 32.0 | 44.7 |
 (mg/L) | 307.5 ± 9.5 | 82.9 ± 10.7 | 70.9 | 73.0 |
| Fecal coliforms (CFU/100 mL) | 37,667 ± 1,058 | 19,333 ± 482 | 45.2 | 48.7 |
| Turbidity (NTU) | 17,600 ± 373 | 4,020 ± 144 | 70.5 | 77.2 |
| Alkalinity as CaCO3 (mg/L) | 76.8 ± 2.7 | 66.4 ± 2.8 | 17.2 | 13.5 |
| VFAs as acetic acid (mg/L) | 9.7 ± 0.26 | 22.7 ± 1.9 | 13.8 | −133.5 |
| Performance parameter | In | Out | Expected design efficiency (%) | Actual biodigester efficiency (%) |
|---|---|---|---|---|
| BOD5 (mg/L) | 960 ± 159 | 320 ± 27 | 71.7 | 66.7 |
| (mg/L) | 4,032 ± 624 | 1,312 ± 86 | 78 | 67.5 |
| TSS (mg/L) | 10,100 ± 428 | 2,860 ± 104 | 60.1 | 71.7 |
| (mg/L) | 189 ± 14 | 550 ± 18 | −145 | −191.0 |
| NH3 (mg/L) | 570 ± 85 | 315 ± 58 | 32.0 | 44.7 |
| (mg/L) | 307.5 ± 9.5 | 82.9 ± 10.7 | 70.9 | 73.0 |
| Fecal coliforms (CFU/100 mL) | 37,667 ± 1,058 | 19,333 ± 482 | 45.2 | 48.7 |
| Turbidity (NTU) | 17,600 ± 373 | 4,020 ± 144 | 70.5 | 77.2 |
| Alkalinity as CaCO3 (mg/L) | 76.8 ± 2.7 | 66.4 ± 2.8 | 17.2 | 13.5 |
| VFAs as acetic acid (mg/L) | 9.7 ± 0.26 | 22.7 ± 1.9 | 13.8 | −133.5 |