Sugar content of microalgae must increase to increase H2 yield.
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Electrocoagulation and solar dryer reduce 90% the harvesting-drying energy demand.
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Paddle wheels contribute 5% to culture energy demand when using ideal 0.1 kW/m2.
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Pigment extraction increases 2 times the biorefinery economic benefits.
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Pigment energy demand account for 62% and must be reduced significantly.