Comparative performance and technoeconomic analyses of two microalgae harvesting systems evaluated at a commercially relevant scale

Using a commercially scalable system designed for processing thousands of liters day, here we evaluated the factors that affected performance, energy consumption and capital/operating costs both flocculation-based filtration-based algal harvesting systems over 16 month period. Coagulation efficiency was primary driver harvest in method, while cell lysis important method. Culture (algae) age differentially influenced through changes fragility stickiness. The average method 0.389 kWh/m3, 4.343 kWh/m3. cost 5.35 $/m3, it 4.52 $/m3. concentration factor were 770–1086 407–448, respectively. For methods, labor dominated ranged from 55.84%–67.94% total cost. Further automation is potential to lower could produce better quality biomass with higher less ash content, but needed more input, as compared This study highlights importance culture status successful harvesting, also provides insight into developing efficient technology capital