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Safi, C.; Cabas Rodriguez, L.; Mulder, W.J.; Engelen-Smit, N.; Spekking, W.; van den Broek, L.A.M.; Olivieri, G.; Sijtsma, L.
Bioresource technology, 09/2017, Letnik: 239Journal Article
•A 100g.L−1 slurry of Nannochloropsis gaditana was submitted to cell disruption.•Multiple cell disruption methods were screened on the slurry.•High-pressure homogenization and bead milling were the most efficient.•Pulsed Electric Field was the least efficient on all levels.•The lowest energy cost per unit of released protein was obtained with HPH.•The mathematical model corresponds to the experimental data of HPH and bead milling. Several cell disruption methods were tested on Nannochloropsis gaditana, to evaluate their efficiency in terms of cell disintegration, energy input and release of soluble proteins. High-pressure homogenization (HPH) and bead milling were the most efficient with >95% cell disintegration, ±50% (w/w) release of total proteins and low energy input (<0.5kWh.kg−1biomass). Enzymatic treatment required low energy input (<0.34kWh.kg−1biomass), but it only released ±35% protein (w/w). Pulsed Electric Field (PEF) was neither energy-efficient (10.44kWh.kg−1biomass) nor successful for protein release (only 10% proteins w/w) and cell disintegration. The release of proteins after applying HPH and bead milling always required less intensive operating conditions for cell disruption. The energy cost per unit of released protein ranged from 0.15–0.25 €.kgProtein−1 in case of HPH, and up to 2–20 €.kgProtein−1 in case of PEF.
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