Multiparametric Evaluation of <i>Tetradesmus obliquus</i> Biomass: An Integrated Approach Including Antioxidant, Nutritional, and Energy Properties

Multiparametric Evaluation of <i>Tetradesmus obliquus</i> Biomass: An Integrated Approach Including Antioxidant, Nutritional, and Energy Properties

The microalga <i>Tetradesmus obliquus</i> has emerged as a promising candidate for biotechnological and industrial applications due to its rapid growth, resilience under diverse environmental conditions, and potential for bioactive compound production. This study presents a multiparametr...

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Main Authors: Gilvana Scoculi de Lira, Ihana Aguiar Severo, Fernando Augusto Ferraz, Iago Gomes Costa, Matheus Murmel Guimarães, Ingrid Fátima Zattoni, Luiz Fernando Bianchini, José Viriato Coelho Vargas, Dhyogo Miléo Taher, André Bellin Mariano
Format: Article
Language:English
Published: MDPI AG 2025-07-01
Series:Microorganisms
Subjects:
calorific value
industrial photobioreactors
microalgal biomass
bioproducts
physicochemical composition
antioxidant
Online Access:https://www.mdpi.com/2076-2607/13/7/1583
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Summary:The microalga <i>Tetradesmus obliquus</i> has emerged as a promising candidate for biotechnological and industrial applications due to its rapid growth, resilience under diverse environmental conditions, and potential for bioactive compound production. This study presents a multiparametric characterization of dry <i>T. obliquus</i> biomass cultivated in patented industrial-scale photobioreactors, integrating thermochemical, elemental, antioxidant, and protein analyses. Proximate and ultimate analyses were conducted to assess fuel potential, revealing favorable volatile matter (VM = 64.80–72.44%) and fixed carbon (FC = 15.77–21.23%) contents. The HHV (18.32–22.75 MJ·kg<sup>−1</sup>) and LHV (16.86–21.24 MJ·kg<sup>−1</sup>) confirmed the biomass as a viable candidate for solid biofuel. The elemental composition provided the total nitrogen values, subsequently used to estimate the protein content via both the Kjeldahl and Dumas methods, with results ranging from 36.66% to 40.02%, in line with the literature. Despite the absence of detectable antioxidant activity under the tested DPPH conditions, the biomass demonstrated a robust nutritional profile and energy potential. These findings support the industrial relevance of <i>T. obliquus</i> biomass, particularly for applications targeting sustainable protein sources and bioenergy solutions.
ISSN:2076-2607

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