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<p>Sugarcane vinasse is the main wastewater from the ethanol industry in Brazil, generated by the distillation of the alcoholic solution from fermentation in 10 L for each liter of ethanol produced. A biorefinery is understood as a bioprocess capable of integrating equipment and technologies with low environmental impact aimed at converting biomass to generate energy, fuels and even renewable bioproducts. One of the aspects of biorefinery is the so-called “microalgal biorefinery”, through the use of effluents in the cultivation of these microorganisms to obtain biomass rich in intracellular products. Microalgae are photosynthetic organisms eukaryotic, such as chlorophyte algae (Chlorophyta), or prokaryotic organisms, such as cyanobacteria (Cyanophyceae). Several strategies have been developed to produce microalgal biomass to use its proteins, lipids, and carbohydrates. In this context, the present study aims to evaluate the growth of the cyanobacterium <i>Phormidium autumnale</i> in a fed-batch with wastewater (vinasse) from sugarcane processing. The results indicated a biomass accumulation within 48&#xa0;h of cultivation, with a maximum concentration of 1,450&#xa0;mg L<sup>−1</sup> and conversion of 0.88&#xa0;mg cells per mg carbon consumed within that period. The biomass obtained had about 43.0% proteins, 12.6% lipids and 11.4% carbohydrates, mainly arabinose, glucose, mannose, and galactose. Even though some of the estimated properties do not conform to international standards, the fatty acid profile of the microalgal biomass indicates the viability of using this oil in biodiesel production, especially considering the low costs of using vinasse.</p> Graphical Abstract <p></p>

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Microalgal Biomass Production by Phormidium autumnale at Fed-batch Bioreactor from Sugarcane Wastewater (vinasse)

  • 期刊论文

  • 发表日期：

    2026年1月9日

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  • Taisne Gonçalves Visentin,
  • Mariana Altenhofen da Silva,
  • Reinaldo Gaspar Bastos

摘要

Sugarcane vinasse is the main wastewater from the ethanol industry in Brazil, generated by the distillation of the alcoholic solution from fermentation in 10 L for each liter of ethanol produced. A biorefinery is understood as a bioprocess capable of integrating equipment and technologies with low environmental impact aimed at converting biomass to generate energy, fuels and even renewable bioproducts. One of the aspects of biorefinery is the so-called “microalgal biorefinery”, through the use of effluents in the cultivation of these microorganisms to obtain biomass rich in intracellular products. Microalgae are photosynthetic organisms eukaryotic, such as chlorophyte algae (Chlorophyta), or prokaryotic organisms, such as cyanobacteria (Cyanophyceae). Several strategies have been developed to produce microalgal biomass to use its proteins, lipids, and carbohydrates. In this context, the present study aims to evaluate the growth of the cyanobacterium Phormidium autumnale in a fed-batch with wastewater (vinasse) from sugarcane processing. The results indicated a biomass accumulation within 48 h of cultivation, with a maximum concentration of 1,450 mg L−1 and conversion of 0.88 mg cells per mg carbon consumed within that period. The biomass obtained had about 43.0% proteins, 12.6% lipids and 11.4% carbohydrates, mainly arabinose, glucose, mannose, and galactose. Even though some of the estimated properties do not conform to international standards, the fatty acid profile of the microalgal biomass indicates the viability of using this oil in biodiesel production, especially considering the low costs of using vinasse.

Graphical Abstract