Microalgae harvesting by flotation using natural saponin and chitosan

Kurniawati, H. Agnes and Ismadji, Suryadi and J.C. Liu, . (2014) Microalgae harvesting by flotation using natural saponin and chitosan. Bioresource Technology, 166. pp. 429-434. ISSN 0960-8524

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Abstract

This study aims to investigate the harvesting of microalgae by dispersed air flotation (DiAF) using natural biosurfactant saponin as the collector and chitosan as the flocculant. Two types of microalgae, Chlorella vulgaris and Scenedesmus obliquus , were used in this study. It was observed that saponin was a good frother, but not an effective collector when used alone for flotation separation of algae. However, with the pre-flocculation of 5 mg/L of chitosan, separation efficiency of >93% microalgae cells was found at 20 mg/L of saponin. Removal efficiency of >54.4% and >73.0% was found for polysaccharide and protein, respectively at 20 mg/L of saponin and chitosan each. Experimental results show that DiAF using saponin and chitosan is effective for separation of microalgae, and algogenic organic matter (AOM). It can potentially be applied in the integrated microalgae-based iorefinery.

Item Type: Article
Uncontrolled Keywords: Chitosan, flotation, harvesting, microalgae, saponin
Subjects: Engineering > Chemical Engineering
Divisions: Journal Publication
Depositing User: Suryadi. Ismadji
Date Deposited: 13 Jul 2016 08:03
Last Modified: 19 Jul 2018 08:11
URI: http://repository.wima.ac.id/id/eprint/4190

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