Development of Full-Cycle Utilization of Chlorella sorokiniana Microalgae Biomass for Environmental and Food Purposes

The application of microalgae biomass of Chlorella sorokiniana as environmentally friendly biosorbents for removing potentially toxic elements (PTE) from water and as a source of biofuel has been thoroughly studied. In this paper, we investigate its physicochemical properties infrared spectroscopy (...

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Published in:Energies (Basel) 2020-05, Vol.13 (10), p.2648
Main Authors: Politaeva, Natalia, Smyatskaya, Yulia, Al Afif, Rafat, Pfeifer, Christoph, Mukhametova, Liliya
Format: Article
Language:English
Subjects:
Algae
Biodiesel fuels
Biofuels
Biomass
Biomedical materials
Chitosan
Chlorella
Chlorella sorokiniana
Fatty acids
Fungi
Heat treatment
Infrared spectra
Infrared spectroscopy
Laboratories
Lipids
Mechanical properties
Metals
microalgae
Physicochemical properties
PTE
Purification
Rare earth elements
REM
Sorbents
Sorption
Water purification
Water treatment
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Summary:The application of microalgae biomass of Chlorella sorokiniana as environmentally friendly biosorbents for removing potentially toxic elements (PTE) from water and as a source of biofuel has been thoroughly studied. In this paper, we investigate its physicochemical properties infrared spectroscopy (IR spectra), microstructure, adsorption properties); we have managed to isolate the lipid complex, which amounted to 20% of dry biomass. Studies of the lipid complex showed that 80.02% of lipids are unsaturated fatty acids (C18:1, C18:2, C18:3). Additionally, we have investigated the efficiency of using the residual biomass obtained after lipid extraction for water purification from rare-earth metals (REM) and PTE. To increase the sorption properties of residual biomass, its thermal modification was carried out and sorption materials based on heat-treated residual biomass and chitosan were created. The physicochemical and mechanical properties of the obtained sorption materials were studied. The total sorption capacity was 31.9 mg/g for REM and 349.7 mg/g for PTE. Moreover, we propose a new method for the disposal of spent sorbents as additional fuel. Spent sorbents can be considered to be biofuel in terms of energy content (20.7 MJ*kg−1). The results of this study provide the basis for increased use of microalgae.
ISSN:1996-1073
1996-1073
DOI:10.3390/en13102648