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Extraction Of Astaxanthin From H. Pluvialis Using Deep Eutectic Solvents, Roya Barzegar
Extraction Of Astaxanthin From H. Pluvialis Using Deep Eutectic Solvents, Roya Barzegar
Electronic Thesis and Dissertation Repository
Haematococcus pluvialis (H. pluvialis) is one of the main sources of astaxanthin, a high value carotenoid and a strong antioxidant. Astaxanthin extraction is hindered by the thick cell wall of H. pluvialis which is composed of sporopollenin. Mechanical cell disruption methods, high cost and energy-consuming, are required to enhance astaxanthin extraction. This study employed a novel technology using deep eutectic solvents (DESs) to demonstrate the possibility of direct extraction of astaxanthin without a disruption step. It was established that 68% of astaxanthin can be extracted from intact H. pluvialis cells using choline chloride-glycerol (ChCl-G) mixture with 12.5% (v/v ) water …
Experimental & Empirical Correlations For The Determination Of The Overall Volumetric Mass Transfer Coefficients Of Carbon Dioxide In Stirred Tank Bioreactors, Syeda Anam Kazim
Experimental & Empirical Correlations For The Determination Of The Overall Volumetric Mass Transfer Coefficients Of Carbon Dioxide In Stirred Tank Bioreactors, Syeda Anam Kazim
Electronic Thesis and Dissertation Repository
One of the most important parameters to cultivate microalgae is carbon dioxide absorption by microalgae. Therefore, it is necessary to determine the overall volumetric mass transfer coefficient (KLa) of carbon dioxide to quantify CO2 transfer from the gaseous to the liquid phase. Until now, finding KLa of CO2 for microalgae cultivation has been a challenge as there is not much information available about it in the literature and most of the time the CO2 transfer to microalgae is approximated. In this study, correlations to directly calculate KLa of CO2 in …