Table 3 Metabolite analysis in the semi-continuous subculture.
From: Magnetite nanoparticles facilitate methane production from ethanol via acting as electron acceptors
| Â | Ethanol (mM) | Acetate (mM) | Propionate (mM) | Butyrate (mM) | Caproate (mM) |
|---|---|---|---|---|---|
PEC-HZ | |||||
 Start-up | 0.64 ± 0.10 | 1.26 ± 0.08 | 0.26 ± 0.02 | 0.11 ± 0.08 | 0.43 ± 0.18 |
 Generation l | 8.91 ± 4.64 | 5.28 ± 0.44 | 2.07 ± 0.23 | 1.48 ± 0.09 | 1.10 ± 0.08 |
 Generation 2 | 7.55 ± 0.07 | 1.31 ± 0.10 | 0.02 ± 0.00 | 8.30 ± 0.30 | 4.72 ± 0.00 |
PEM-HZ | |||||
 Start-up | 0.59 ± 0.34 | 0.72 ± 0.29 | 0.37 ± 0.16 | 0.15 ± 0.10 | 0.37 ± 0.27 |
 Generation l | 0 | 5.84 ± 2.55 | 2.46 ± 1.76 | 0.54 ± 0.51 | 0.80 ± 0.33 |
 Generation 2 | 0 | 5.06 ± 0.36 | 0.65 ± 0.54 | 0.21 ± 0.05 | 0 |
