Process stability indicator | LNR | HNR1 | HNR2 | HNR3 |
---|---|---|---|---|
pH | 7.11 | 8.36 | 8.32 | 8.30 |
TAN (g_N L−1) | 0.56 | 17.92 | 18.20 | 17.64 |
FAN (g_N L−1) | 0.01 | 4.07 | 3.84 | 3.59 |
TS (g kg−1) | 22.5 | 27.2 | 29.90 | 30.00 |
TVFA (g kg−1) | 0.03 | 21.99 | 21.99 | 23.63 |
Acetate (g kg−1) | 0.02 | 17.68 | 17.49 | 18.91 |
Propionate (g kg−1) | 0.01 | 3.34 | 3.46 | 3.73 |
Biogas production (LN L−1 week−1) | 6.52 | ND | ND | ND |