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Electrocoagulation of Microalga Chlorella vulgaris.
Lucáková, Simona
This study is focused on harvesting of Chlorella vulgaris, well-known microalga with wide range of use in nutrition and health care. Harvesting (separation of cells from a culture medium) is an important part of the production process. It was estimated that approximately 30% of the production costs is the cost of biomass separation. Harvesting densities of photoautotrophic microalgae are relatively low (the final dry biomass concentrations usually vary in range 0.5–3 g/L). Centrifugation is the most frequently used method of harvesting, but it is economically inefficient due to its high process cost.
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Hydrodynamic Behavior of Large Bubbles inSlot Channels.
Ezeji, Kingsley
We present the results of experimental investigation on the dy-namics of air bubbles rising in stagnant or co-flowing liquid insidean inclined rectangular channel. Variable channel geometry (withadjustable height𝐻, perimeter𝑃 = 2(𝐻 + 𝑊), inclination𝛼, and orien-tation – flat𝐻 < 𝑊or tall𝐻 > 𝑊) enabled us to evaluate the influenceof different operation parameters on the bubble shape and velocity. Measurements of the rise velocity of large Taylor bubbles (𝑈TB) werecarried out by using a high-speed video camera system and an imageprocessing technique.
Plný text: PDF
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