Formulation of optimal bioenergy mixtures from phototrophic and heterotrophic cultures of S. quadricauda and C. pyrenoidosa microalgal strains

Ashwin Jacob, B. Ashok, S. Shanthakumar, L. Jino, A. Karthikeyan, Rahul Kavvampally and Ignatius Raja

Renewable Energy, 2022, vol. 197, issue C, 695-708

Abstract: The goal of this research is to produce bio-alcohol and biodiesel from S. quadricauda and C. pyrenoidosa microalgae in a sustainable manner using phototrophic and heterotrophic pathways. Experimental and statistical approaches are used to assess the viability of the bioenergy produced as a prospective alternative to diesel fuel. On analysis, it was observed that the %age weight of the dry cell of C. pyrenoidosa cultures on scaling-up resulted lipid content of 44.1%, 46.7%, and 41%, respectively. On scaling up, the cultures’ biomass concentrations reached 5.15 g L −1, 4.24 g L −1, and 4.36 g L −1. Similarly, upscaling S. quadricauda cultures resulted in yield rates of 4.2 g L −1 and 2.96 g L −1 d −1 and a lipid productivity of 2.96 g L −1 d −1, respectively. On engine testing, AA20D80 and AA30D70 blend combinations shows an improvement of 4.84% and 6.9% in BTE with a reduction of 88.6% and 72.41% in fuel consumption. Similarly, as compared to amyl alcohol blends and diesel fuel at full load, CP20D80 and CP30D70 efficiently lower HC, NOx, and smoke emissions. The statistical analysis revealed that the similarity index of the 20% and 30% proportions were ideal in achieving optimal engine output characteristics.

Keywords: Production; Phototrophic; Microalgae; Engine; Heterotrophic; Biomass; Sustainable (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:197:y:2022:i:c:p:695-708

DOI: 10.1016/j.renene.2022.08.007

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