380
M. C. Deprá et al.
Table 15.5 Elementary flows
of the process to produce 1 kg
of microalgae-based
phycocyanin
Process
Unit
Phycocyanin
Cultivation
Input
Nutrients enrichment
Phosphate
kg
0.33
Nitrate
kg
0.48
Tubular photobioreactor
m 3
–
Power consumption for cooling
kWh
–
Aeration power
kWh
–
CO 2 consumption
kg
–
Water evaporation
m 3
–
Raceway pond
m 3
41.66
Electric power for paddle wheel
kW
22.50
Electric power for water pumping
kW
4.16
Electric power for CO 2 injection
kW
13.83
CO 2 consumption
kg
2.0
Biomass productivity
kg/m 3
0.32
Output
Water evaporation
m 3
5.41
Algae liquid
kg
71.09
Harvest
Input
Power consumption centrifugation
kWh
84.52
Drying
Input
Wet biomass
kg
53.31
Spray-dryer
kWh
22.92
Extraction
Input
Dry biomass
kg
13.33
sCO 2
kWh
10.66
Output
Oil rich pigments
kg
1
Source Pagels et al. (2019)