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Table 10 Selected life cycle modeling assumptions for several studies

From: Integration of biology, ecology and engineering for sustainable algal-based biofuel and bioproduct biorefinery

Process Growth System boundaries Functional unit References
Flocculation, oil extraction, biodiesel production Open raceway ponds
Nutrient-sufficient/nitrogen deprived cultivation
Cradle-to-grave 1 MJ fuel Bernard (2009)
Flocculation, homogenization and solvent extraction, biodiesel production Open raceway ponds Cradle-to-grave
Cradle-to-grave
1 ton biodiesel Stephenson et al. (2010)
Flocculation and centrifugation, homogenization and solvent extraction, biodiesel production Tubular-photo bioreactors 1 ton biodiesel
Filter press/centrifuge and drying, oil extraction, biodiesel production Photo bioreactors + open ponds Cradle-to-grave 1000 MJ fuel Sander and Murthy (2010)
Centrifuge, drying, oil extraction, biodiesel production Bubble column Photobioreactor (bcPBR) Cradle-to-grave 1 kg dry biomass Sevigné Itoiz et al. (2012)
Wet extraction: cultivation, extraction, solvent recovery, oil separation, belt filter press, feed dryer, and biodiesel production Open raceway ponds Cradle-to-grave 1 MJ fuel Passell et al. (2013)
Chemical flocculation, mechanical drying/spray drying, oil extraction, biodiesel production Open raceway ponds Cradle-to-grave 1 kg biodiesel Togarcheti et al. (2017)