Preliminary integrated economic and environmental analysis of polyhydroxyalkanoates (PHAs) biosynthesis

Bioresources and Bioprocessing

Table 5 Summary of the sensitivity analysis using five different cases

Carbon source	Soybean oil	WCO	Refined glycerol	Crude glycerol
a. Case 1
Cost (USD$/kg PHA)	1.631	1.180	0.484	0.402
PEI (kg PHA⁻¹)	1.568	4.657	1.130	1.560
EB (kg PHA⁻¹)	1.568	−4.275	−1.062	−1.466
Cost λ _o	0	0.367	0.933	1
PEI λ _o	0.876	0	1	0.878
EB λ _o	0	1	0.450	0.519
(Cost + PEI) λ	0	0	0.933	0.878
(Cost + EB) λ	0	0.367	0.450	0.519
b. Case 2
Cost (USD$/kg PHA)	1.631	1.180	0.440	0.362
PEI (kg PHA⁻¹)	1.568	4.657	1.027	1.560
EB (kg PHA⁻¹)	1.568	−4.275	−0.966	−1.466
Cost λ _o	0	0.367	0.969	1
PEI λ _o	0.851	0	1	0.853
EB λ _o	0	1	0.434	0.519
(Cost + PEI) λ	0	0	0.969	0.853
(Cost + EB) λ	0	0.367	0.434	0.519
c. Case 3
Cost (USD$/kg PHA)	1.631	1.180	0.484	0.386
PEI (kg PHA⁻¹)	1.568	4.657	1.130	1.404
EB (kg PHA⁻¹)	1.568	−4.275	−1.062	−1.32
Cost λ _o	0	0.367	0.921	1
PEI λ _o	0.876	0	1	0.922
EB λ _o	0	1	0.450	0.494
(Cost + PEI) λ	0	0	0.921	0.922
(Cost + EB) λ	0	0.367	0.450	0.494
d. Case 4
Cost (USD$/kg PHA)	1.631	1.180	0.446	0.362
PEI (kg PHA⁻¹)	1.568	4.657	1.130	1.404
EB (kg PHA⁻¹)	1.568	−4.275	−1.062	−1.320
Cost λ _o	0	0.355	0.934	1
PEI λ _o	0.876	0	1	0.922
EB λ _o	0	1	0.450	0.494
(Cost + PEI) λ	0	0	0.934	0.922
(Cost + EB) λ	0	0.355	0.450	0.494