Improved biomass and lipid production in Synechocystis sp. NN using industrial wastes and nano-catalyst coupled transesterification for biodiesel production. (October 2017)

• Record Type: Journal Article
• Authors: Jawaharraj, Kalimuthu; Karpagam, Rathinasamy; Ashokkumar, Balasubramaniem; Kathiresan, Shanmugam; Moorthy, Innasi Muthu Ganesh; Arumugam, Muthu; Varalakshmi, Perumal
• Is Part Of: Bioresource technology. Volume 242(2017)
• Page Start: 128
• Page End: 132
• Publication Date: 2017-10
• Subjects: Synechocystis sp. -- Biodiesel -- Hybrid RSM-GA -- Electroflocculation -- Nano-catalysts -- Whole cell transesterification; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2017.03.067
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Biomass and lipid 1.6 and 1.3 folds productivities in Synechocystis sp. NN by hybrid RSM-GA. Ultrasonication improved the lipid content 19.3% by lipid extraction pretreatment. Electroflocculation was the best harvesting method yielded 97.8% in 10 min. Titanium oxide mediated whole-cell transesterification yielded highest FAME. Abstract: In this study, the improved biomass (1.6 folds) and lipid (1.3 folds) productivities in Synechocystis sp. NN using agro-industrial wastes supplementation through hybrid response surface methodology-genetic algorithm (RSM-GA) for cost-effective methodologies for biodiesel production was achieved. Besides, efficient harvesting in Synechocystis sp. NN was achieved by electroflocculation (flocculation efficiency 97.8 ± 1.2%) in 10 min when compared to other methods. Furthermore, different pretreatment methods were employed for lipid extraction and maximum lipid content of 19.3 ± 0.2% by Synechocystis sp. NN was attained by ultrasonication than microwave and liquid nitrogen assisted pretreatment methods. The highest FAME (fatty acid methyl ester) conversion of 36.5 ± 8.3 mg FAME/g biomass was obtained using titanium oxide as heterogeneous nano-catalyst coupled whole-cell transesterification based method. Conclusively, Synechocystis sp. NN may be used as a biodiesel feedstock and its fuel production can be enriched by hybrid RSM-GA and nano-catalyst technologies.