Integration of microalgae production with industrial biofuel facilities: A critical review

Klein, Bruno Colling; Bonomi, Antonio; Filho, Rubens Maciel

doi:10.1016/j.rser.2017.04.063

Cited by 114 publications

(28 citation statements)

References 189 publications

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“…When the bulk microalgae biomass is not the desired product, it must undergo further processing to obtain one or more cell fractions. Some microalgae have a rigid cell wall, which leads to cell breakdown being necessary for releasing internal compounds, such as lipids and pigments that are contained in the cytoplasm and carbohydrates stored in the cell wall [34]. For the extraction of microalgal oil, there are mechanical (pressing), chemical (solvent extraction), and supercritical fluid extraction methods [17,25].…”

Section: Of 19mentioning

confidence: 99%

“…On the other hand, recent researches to improve the cost of obtaining microalgae has focused on the use of waste and integrating the co-production of high-value compounds [39]. CO 2 sequestration using a biorefinery approach, through interconnection with the cultivation of microalgae, is an interesting idea, since the waste generated from power plants or other industrial facilities is used [34,40]. The residual microalgae biomass, which was rich in protein and carbohydrates, could still be used as a carbon source for anaerobic fermentation in the production of volatile fatty acids, biohydrogen, CO 2 , among others.…”

Section: Of 19mentioning

confidence: 99%

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Techno-Economic Study of CO2 Capture of a Thermoelectric Plant Using Microalgae (Chlorella vulgaris) for Production of Feedstock for Bioenergy

et al. 2020

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A current concern is the increase in greenhouse gas emissions, mainly CO2, with anthropogenic sources being the main contributors. Microalgae have greater capacity than terrestrial plants to capture CO2, with this being an attraction for using them as capture systems. This study aims at the techno-economic evaluation of microalgae biomass production, while only considering technologies with industrial scaling potential. Energy consumption and operating costs are considered as parameters for the evaluation. In addition, the capture of CO2 from a thermoelectric plant is analyzed, as a carbon source for the cultivation of microalgae. 24 scenarios were evaluated while using process simulation tools (SuperPro Designer), being generated by the combination of cultivations in raceway pond, primary harvest with three types of flocculants, secondary harvest with centrifugation and three filtering technologies, and finally the drying evaluated with Spray and Drum Dryer. Low biomass productivity, 12.7 g/m2/day, was considered, achieving a capture of 102.13 tons of CO2/year in 1 ha for the cultivation area. The scenarios that included centrifugation and vacuum filtration are the ones with the highest energy consumption. The operating costs range from US $ 4.75–6.55/kg of dry biomass. The choice of the best scenario depends on the final use of biomass.

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Section: Of 19mentioning

confidence: 99%

Section: Of 19mentioning

confidence: 99%

Techno-Economic Study of CO2 Capture of a Thermoelectric Plant Using Microalgae (Chlorella vulgaris) for Production of Feedstock for Bioenergy

et al. 2020

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“…This microalga was chosen because of its promising technofunctional properties, low price, and low environmental impact . The use of heterotrophically cultivated microalgae has several advantages for the use in foods: (i) no chlorophyll, (ii) reduced microbial load, (iii) lower production costs, (iv) lower environmental impact than phototrophic cultivation, and finally (vi) no or only little arable land is needed for the cultivation plant …”

Section: Introductionmentioning

confidence: 99%

Sensory properties of aqueous dispersions of protein‐rich extracts from Chlorella protothecoides at neutral and acidic pH

et al. 2019

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BACKGROUND: Water-soluble proteins extracted from the heterotrophically cultivated microalga Chlorella protothecoides have been shown to have a good solubility over a broad pH range, which makes them a promising candidate for beverage formulations. This study investigated the sensory properties of dispersions of a protein-rich extract from C. protothecoides at neutral and pH 3. RESULTS: Sensory acceptance tests of the pure extract revealed an overall low acceptance at pH 7 without sucrose addition. Sensory acceptance was significantly (P ≤ 0.05) increased by lowering the pH to 3 with citric acid, and the addition of 50 g kg −1 sucrose. Here, overall positive sensory acceptance ratings were achieved up to a protein extract concentration of 40 g kg −1 . Basic taste evaluations showed only low bitterness scores and no significant (P > 0.05) increase in bitterness with decreasing pH. CONCLUSION: It is suggested that protein-rich extracts from C. protothecoides have promising sensory properties in beverage formulations.

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“…3,8,9 Apesar da alta eficiência fotossintética das microalgas, os custos das etapas de cultivo, recuperação da biomassa e sua conversão em biocombustíveis não competem com os custos de produção do bioetanol e biodiesel obtidos a partir de matérias-primas convencionais. 5,7,10 Os meios sintéticos empregados para o cultivo de biomassa microalgal elevam os custos da produção dos biocombustíveis. 5 Para a redução do custo de produção, o CO2, macro e micronutrientes e a água necessária para o crescimento das microalgas devem ser obtidos a baixo custo.…”

Section: Introductionunclassified

“…3,12 Segundo essa lógica, os efluentes e coprodutos da cadeia produtiva do bioetanol e biodiesel podem tornar-se fontes alternativas de nutrientes, juntamente com o desenvolvimento de loops de sequestro de carbono, para o cultivo microalgal. 3, 10,13 Neste contexto, esta revisão buscou destacar pontos de interseção e convergência entre a cadeia de produção de bioetanol e biodiesel, oriundos da transformação de biomassas convencionais, com a produção de biocombustíveis de terceira geração, provenientes do uso de microalgas.…”

Section: Introductionunclassified

Microalgae and Biofuels: Integration of Productive Chains

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Sartori²,

Veloso³

et al. 2018

Rev. Virtual Quim

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The microalgae biofuels are considered a technically feasible alternative to supply the demands of the automotive, aviation and energy sectors. However, the costs associated with cultivation and processing still limit the scale-up of biomass production and its conversion into biofuels. One of the barriers associated with microalgae cultivation is the cost of nutrients used in heterotrophic and mixotrophic cultures. In this review were described and analyzed initiatives to explore effluents or coproducts from production chains of bioethanol and biodiesel for use as sources of nutrients for the cultivation of microalgae. With the purpose of reducing costs and integrating convergent agroindustrial chains, were evaluate the use of vinasse from the first generation of bioethanol plants, hemicellulosic hydrolyzate from the acid pretreatment of sugarcane bagasse, crude glycerol produced by the transesterification of oils and fats and washing water of biodiesel for the production of algal biomass.

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Integration of microalgae production with industrial biofuel facilities: A critical review

Cited by 114 publications

References 189 publications

Techno-Economic Study of CO2 Capture of a Thermoelectric Plant Using Microalgae (Chlorella vulgaris) for Production of Feedstock for Bioenergy

Techno-Economic Study of CO2 Capture of a Thermoelectric Plant Using Microalgae (Chlorella vulgaris) for Production of Feedstock for Bioenergy

Sensory properties of aqueous dispersions of protein‐rich extracts from Chlorella protothecoides at neutral and acidic pH

Microalgae and Biofuels: Integration of Productive Chains

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