Novel astaxanthin extraction from Haematococcus pluvialis using cell permeabilising ionic liquids

2016 ◽  
Vol 18 (5) ◽  
pp. 1261-1267 ◽  
Author(s):  
Rupali K. Desai ◽  
Mathieu Streefland ◽  
Rene H. Wijffels ◽  
Michel H. M. Eppink
Keyword(s):  
Cell Wall ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ethyl Acetate ◽  
Haematococcus Pluvialis ◽  
Liquid Solution ◽  
Mechanical Disruption ◽  
Pre Treatment ◽  
Ionic Liquid Solution ◽  
Astaxanthin Extraction

Pre-treatment of H. pluvialis with an aqueous ionic liquid solution permeabilises the cell wall and astaxanthin can be subsequently extracted with ethyl acetate without mechanical disruption.

scholarly journals Ionic Liquids and Water: Hydrophobicity vs. Hydrophilicity

Molecules ◽  
2021 ◽  
Vol 26 (23) ◽  
pp. 7159
Author(s):  
Rita F. Rodrigues ◽  
Adilson A. Freitas ◽  
José N. Canongia Lopes ◽  
Karina Shimizu
Keyword(s):  
Ionic Liquid ◽  
Hydrogen Bonding ◽  
Ionic Liquids ◽  
Aqueous Media ◽  
Liquid Solution ◽  
Chemical Processes ◽  
Processes And Reactions ◽  
High Hydrogen ◽  
Ionic Liquid Solution ◽  
Dynamics Simulations

Many chemical processes rely extensively on organic solvents posing safety and environmental concerns. For a successful transfer of some of those chemical processes and reactions to aqueous media, agents acting as solubilizers, or phase-modifiers, are of central importance. In the present work, the structure of aqueous solutions of several ionic liquid systems capable of forming multiple solubilizing environments were modeled by molecular dynamics simulations. The effect of small aliphatic chains on solutions of hydrophobic 1-alkyl-3-methylimidazolium bis(trifluoromethyl)sulfonylimide ionic liquids (with alkyl = propyl [C3C1im][NTf2], butyl [C4C1im][NTf2] and isobutyl [iC4C1im][NTf2]) are covered first. Next, we focus on the interactions of sulphonate- and carboxylate-based anions with different hydrogenated and perfluorinated alkyl side chains in solutions of [C2C1im][CnF2n+1SO3], [C2C1im][CnH2n+1SO3], [C2C1im][CF3CO2] and [C2C1im][CH3CO2] (n = 1, 4, 8). The last system considered is an ionic liquid completely miscible with water that combines the cation N-methyl-N,N,N-tris(2-hydroxyethyl)ammonium [N1 2OH 2OH 2OH]+, with high hydrogen-bonding capability, and the hydrophobic anion [NTf2]–. The interplay between short- and long-range interactions, clustering of alkyl and perfluoroalkyl tails, and hydrogen bonding enables a wealth of possibilities in tailoring an ionic liquid solution according to the needs.

scholarly journals Techno-economic analysis of a new downstream process for the production of astaxanthin from the microalgae Haematococcus pluvialis

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Andreas Bauer ◽  
Mirjana Minceva
Keyword(s):  
Cell Wall ◽  
Economic Analysis ◽  
Ethyl Acetate ◽  
Net Present Value ◽  
Haematococcus Pluvialis ◽  
Light Stress ◽  
Downstream Process ◽  
Cell Wall Disruption ◽  
Cyst Cells ◽  
Astaxanthin Extraction

AbstractThe biotechnological production of the carotenoid astaxanthin is done with the microalgae Haematococcus pluvialis (H. pluvialis). Under nutrient deficiency and light stress, H. pluvialis accumulates astaxanthin intracellularly and forms a resistant cyst cell wall that impedes direct astaxanthin extraction. Therefore, a complex downstream process is required, including centrifugation, mechanical cell wall disruption, drying, and supercritical extraction of astaxanthin with CO2. In this work, an alternative downstream process based on the direct extraction of astaxanthin from the algal broth into ethyl acetate using a centrifugal partition extractor (CPE) was developed. A mechanical cell wall disruption or germination of the cysts was carried out to make astaxanthin accessible to the solvent. Zoospores containing astaxanthin are released when growth conditions are applied to cyst cells, from which astaxanthin can directly be extracted into ethyl acetate. Energy-intensive unit operations such as spray-drying and extraction with supercritical CO2 can be replaced by directly extracting astaxanthin into ethyl acetate. Extraction yields of 85% were reached, and 3.5 g of oleoresin could be extracted from 7.85 g homogenised H. pluvialis biomass using a CPE unit with 244 mL column volume. A techno-economic analysis was done for a hypothetical H. pluvialis production facility with an annual biomass output of 8910 kg. Four downstream scenarios were examined, comparing the novel process of astaxanthin extraction from homogenised cyst cells and germinated zoospores via CPE extraction with the conventional industrial process using in-house or supercritical CO2 extraction via an external service provider. After 10 years of operation, the highest net present value (NPV) was determined for the CPE extraction from germinated zoospores.

scholarly journals Thermochromism and switchable paramagnetism of cobalt(ii) in thiocyanate ionic liquids

2015 ◽  
Vol 44 (25) ◽  
pp. 11286-11289 ◽  
Author(s):  
Stephen J. Osborne ◽  
Sil Wellens ◽  
Chris Ward ◽  
Solveig Felton ◽  
Robert M. Bowman ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Liquid Solution ◽  
Temperature Dependent ◽  
Ionic Liquid Solution

Temperature-dependent switching of paramagnetism of a cobalt(ii) complex is observed in an ionic liquid solution.

The Application of Nanofiltration Technology in Recovery of Ionic Liquids from Spinning Wastewater

2012 ◽  
Vol 178-181 ◽  
pp. 499-502 ◽  
Author(s):  
Xi Liu ◽  
Wei Wang
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Fiber Composite ◽  
Water Flux ◽  
Rejection Rate ◽  
Liquid Solution ◽  
Nanofiltration Membrane ◽  
Nanofiltration Membranes ◽  
Solution Increase ◽  
Ionic Liquid Solution

In this paper, the effects of the concentration, temperature, and run-time of ionic liquids solution, on the rejection capacity of home-made hollow fiber composite nanofiltration membrane were studied. Then the nanofiltration membrane was used to the recover ionic liquids by concentrating spinning wastewater. The results shows that: The rejection rate of the composite nanofiltration membranes and its water fluxes lightly down with the concentration of ionic liquids increase; with running-time and temperature of ionic liquid solution increase, the rejection rate of the composite nanofiltration membranes decreases, but its water flux increases; the nanofiltration membrane can be use for recovering ionic liquid from the spinning wastewater and get very good recovery effects.

Ionic liquid as an effective solvent for cell wall deconstructing through astaxanthin extraction from Haematococcus pluvialis

2018 ◽  
Vol 54 (2) ◽  
pp. 583-590 ◽  
Author(s):  
Zhi-Wei Liu ◽  
Zhou Yue ◽  
Xin-An Zeng ◽  
Jun-Hu Cheng ◽  
Rana Muhammad Aadil
Keyword(s):  
Cell Wall ◽  
Ionic Liquid ◽  
Haematococcus Pluvialis ◽  
Astaxanthin Extraction
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