Primary digester | Secondary digester | |
---|---|---|
TS (%) | 6.34 ± 0.54 | 4.98 ± 0.60 |
VS (% TS) | 74.2 ± 0.53 | 68.2 ± 0.75 |
pH (−) | 7.80 ± 0.15 | 7.93 ± 0.14 |
VFA/TIC (−) | 0.19 ± 0.01 | 0.16 ± 0.01 |
NH4-N (g/L) | 1.131 ± 153 | 1.680 ± 201 |
Acetate (mg/L) | 126 ± 49.2 | 12.1 ± 11.8 |
Propionate (mg/L) | 24 ± 5.76 | 10.7 ± 10.2 |
Butyrate (mg/L) | <1 | <1 |