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Evaluation of the effect of flocculation technique using aluminum chloride (AlCl₃) on harvesting efficiency, concentration factor and beta-carotene pigment of Dunaliella salina
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Zahra Aminikhoei *   , Elnaz Erfanifar2 , Ashkan Ajdari2 |
-, - , zamini.41@gmail.com
2- - |
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Abstract: (1293 Views) |
| The harvesting microalgae from their dilute culture medium is a challenging and costly process that accounts for about 30-30% of total production costs. Therefore, finding the suitable technique for harvesting candidate strains of commercial production is very important. In the present study, the effect of using different amounts (0.1, 0.3, 0.5, 0.7 and 1 g / l) of aluminum chloride (AlCl₃) as a flocculant was investigated on harvesting efficiency and pigments of microalgae, Dunaliella salina. At first, the native microalgae D. salina isolated from back barrier Lipar, Chabahar was cultured in laboratory to reach maximum production in exponential growth phase, then different amounts of flocculant were added to the culture medium. Finally, the efficiency of AlCl3 in harvesting process and also its effect on the pigments composition of harvested biomass were investigated. The possibility of reusing the flocculated medium culture was also tested. The results of this study showed that with increasing the consumption of aluminum chloride from 0.1 g to 1 g / l flocculation efficiency increased significantly. However, the consumption more than 0.7 g / l of flocculant aluminum chloride caused a significant reduction in the content of chlorophyll, total carotenoid and beta-carotene pigments in the harvested biomass. Therefore, to maintain the quality of harvested biomass, it is recommended to use 0.7 g / l aluminum chloride with 75% efficiency for harvesting microalgae D. salina. |
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| Keywords: Microalgae, Dunaliella salina, Flocculation, Harvest efficiency, Beta-carotene |
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Full-Text [PDF 626 kb]
(268 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2021/12/12 | Accepted: 2022/07/24 | Published: 2023/10/2
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