Table 2 Organic acid concentrations in the liquid fractions of MFCs operated for 30 days at pH 7.0, pH 5.5, or pH 4.0
MFC | Organic acid concentration (mM) | ||||
|---|---|---|---|---|---|
Formate | Acetate | Propionate | Butyrate | Lactate | |
pH 7.0 | ND | 0.39 | ND | 0.08 | ND |
pH 5.5 | 0.27 | 0.44 | 0.19 | 0.30 | ND |
pH 4.0 | 0.18 | 0.62 | 0.47 | 0.47 | 0.06 |