Table 3 Economic and environmental evaluation between different carbon sources for C. necator
Carbon sources | Soybean oil | WCO | Refined glycerol | Crude glycerol |
|---|---|---|---|---|
Material cost (USD$/kg PHA) | 1.631 | 1.180 | 0.484 | 0.362 |
HTPI (kg PHA−1) | 0.192 | 0.533 | 0.061 | 1.000 |
TTP (kg PHA−1) | 0.192 | 0.533 | 0.061 | 1.000 |
HTPE (kg PHA−1) | 0.0002 | 0.0004 | 0.046 | 0.095 |
ATP (kg PHA−1) | 1.184 | 3.590 | 0.003 | 0.003 |
GWP (kg PHA−1) | 0.000 | 0.000 | 0.000 | 0.000 |
ODP (kg PHA−1) | 0.000 | 0.000 | 0.000 | 0.000 |
POP (kg PHA−1) | 0.000 | 0.000 | 0.959 | 1.958 |
AP (kg PHA−1) | 0.000 | 0.000 | 0.000 | 0.000 |
Total PEI (kg PHA−1) | 1.568 | 4.657 | 1.130 | 1.404 |
Environmental burdens (kg PHA−1) | +1.568 | −4.275 | −1.062 | −1.320 |