Meta-Analytic Review on Third-Generation Biodiesel

Moreira, Bruno Rafael de Almeida; Viana, Charlene Raquel de Almeida; Cruz, Victor Hugo; Lopes, Paulo Renato Matos; Viana, Ronaldo da Silva; Ramos, Ricardo Alan Verdú

doi:10.1007/s12155-020-10232-6

Cited by 6 publications

(2 citation statements)

References 84 publications

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“…R. subcapitata presents a lipid content of ~ 27% (dry microalgae biomass), which is higher than that found in the microalga Scenedesmus spinosus and Scenedesmus acuminatus , thus presenting great potential for biofuels production (Nascimento et al 2020 ). Usually, the increase in lipid levels occurs when microalgae are in the stationary phase of growth, upon nutrient limitation or under different stresses, such as temperature and light (Pinzi and Dorado 2012 ; Moreira et al 2022 ). An increase in fatty acid content in R. subcapitata when cultivated under phosphate limitation has been described (Benasla and Hausler 2020 ), being able to reach a lipid content of ~ 32% (dry biomass) under nitrate limitation (Del Río et al 2015 ).…”

Section: Biotechnological Applicationsmentioning

confidence: 99%

Features of the microalga Raphidocelis subcapitata: physiology and applications

Machado,

Soares

2024

Appl Microbiol Biotechnol

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The microalga Raphidocelis subcapitata was isolated from the Nitelva River (Norway) and subsequently deposited in the collection of the Norwegian Institute of Water Research as “Selenastrum capricornutum Printz”. This freshwater microalga, also known as Pseudokirchneriella subcapitata, acquired much of its notoriety due to its high sensitivity to different chemical species, which makes it recommended by different international organizations for the assessment of ecotoxicity. However, outside this scope, R. subcapitata continues to be little explored. This review aims to shed light on a microalga that, despite its popularity, continues to be an “illustrious” unknown in many ways. Therefore, R. subcapitata taxonomy, phylogeny, shape, size/biovolume, cell ultra-structure, and reproduction are reviewed. The nutritional and cultural conditions, chronological aging, and maintenance and preservation of the alga are summarized and critically discussed. Applications of R. subcapitata, such as its use in aquatic toxicology (ecotoxicity assessment and elucidation of adverse toxic outcome pathways) are presented. Furthermore, the latest advances in the use of this alga in biotechnology, namely in the bioremediation of effluents and the production of value-added biomolecules and biofuels, are highlighted. To end, a perspective regarding the future exploitation of R. subcapitata potentialities, in a modern concept of biorefinery, is outlined. Graphical Abstract Key points • An overview of alga phylogeny and physiology is critically reviewed. • Advances in alga nutrition, cultural conditions, and chronological aging are presented. • Its use in aquatic toxicology and biotechnology is highlighted.

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Section: Biotechnological Applicationsmentioning

confidence: 99%

Features of the microalga Raphidocelis subcapitata: physiology and applications

Machado,

Soares

2024

Appl Microbiol Biotechnol

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“…Desmodesmus, Scenedesmus, and Tetradesmus are genera included in the Scenedesmaceae family-a green microalgal family ubiquitously found in freshwater environments like the Chlorellaceae family. They have been extensively studied as tools for wastewater treatment [43,44] and biodiesel production [45][46][47]. Alkaliphilic Scenedesmus sp.…”

Section: Phylogenetic Identification Of the Microalgal Strainsmentioning

confidence: 99%

Biogas Upgrading by Wild Alkaliphilic Microalgae and the Application Potential of Their Biomass in the Carbon Capture and Utilization Technology

Kikuchi,

Kanai,

Sugiyama

et al. 2024

Fermentation

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Although biogas is a renewable energy source alternative to natural gas, it contains approximately 40 vol% CO2 and, hence, a low calorific value. The sequestration of CO2 from biogas is, therefore, essential before its widespread use. As CO2 can be easily solubilized as carbonate and bicarbonate in alkaline water, in this study, we isolated and characterized alkaliphilic wild microalgae that grow under high-level CO2 conditions and evaluated their application potential in CO2-removal from biogas. For this purpose, freshwater samples were enriched with 10 vol% CO2 and an alkaline culture medium (pH 9.0), wherein almost free CO2 was converted to carbonate and bicarbonate to yield alkaliphilic and high-level CO2-tolerant microalgae. Ten microalgal strains of Micractinium, Chlorella, Scenedesmus/Tetradesmus, or Desmodesmus spp. were isolated, some of which demonstrated good growth even under conditions of >pH 10 and >30 vol% CO2. All algal strains grew well through fixing biogas-derived CO2 in a vial-scale biogas upgrading experiment, which reduced the CO2 level in biogas to an undetectable level. These strains yielded antioxidant carotenoids, including lutein, astaxanthin, zeaxanthin, and β-carotene, particularly rich in lutein (up to 7.3 mg/g dry cells). In addition, these strains contained essential amino acids, accounting for 42.9 mol% of the total amino acids on average, and they were rich in unsaturated fatty acids (comprising 62.2 wt% of total fatty acids). The present study identified strains that can contribute to biogas upgrading technology, and the present findings suggest that their biomass can serve as useful raw material across the food, nutraceutical, and feed industries.

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