From waste-to-energy: the process integration and intensification for bulk oil and biodiesel production by microalgae

Cyanobacteria are photosynthetic microorganisms which can be found in various environmental habitats. These photosynthetic bacteria are considered as promising feedstock for the production of the third‐ and the fourth‐generation biofuels. The main subject of this review is highlighting the significant aspects of the biofuel production from cyanobacteria. The most recent investigations about the extraction or separation of the bio‐oil from cyanobacteria are also adduced in the present review. Moreover, the genetic engineering of cyanobacteria for improving biofuel production and the impact of bioinformatics studies on the designing better‐engineered strains are mentioned. The large‐scale biofuel production is challenging, so the economic considerations to provide inexpensive biofuels are also cited. It seems that the future of biofuels is strongly dependent to the following items; understanding the metabolic pathways of the cyanobacterial species, progression in the construction of the engineered cyanobacteria, and inexpensive large‐scale cultivation of them.

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“…for biodiesel production. Francisco et al used cassava wastewater as a culture medium for Phormidium sp. to produce bio‐oil.…”

Section: Cultivation Processmentioning

confidence: 99%

Cyanobacteria as an eco‐friendly resource for biofuel production: A critical review

Farrokh

Sheikhpour

Kasaeian³

et al. 2019

Biotechnology Progress

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“…On the other hand, for a new plant to be built, the increased rate implies, in addition to improved productivity, a smaller reactor and therefore a lower capital investment cost. Likewise, improved productivities imply a lower raw material cost and a lower capital investment for existing and new plants (Francisco et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

THIRD GENERATION BIODIESEL PRODUCTION FROM MICROALGAE Phormidium autumnale

Siqueira

Francisco

Queiroz

et al. 2016

Braz. J. Chem. Eng.

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-The aim of this work was to evaluate third generation biodiesel production by the microalgae Phormidium autumnale using sucrose as exogenous carbon source. The study focused on optimization of the different C/N ratios and on the analysis of biofuel quality. The results indicate that a C/N ratio of 40 improved the performance of the system, reaching single-cell oil productivities of 18.9 mg/L in steady-state conditions. This oil has a composition predominantly saturated (45.2%) and monounsaturated (34.7%) suitable for biodiesel synthesis (ester content of 99.8%, cetane number of 58.5%, iodine value of 67.2 gI2/100 g, unsaturation degree of 71.3% and a cold filter plugging point of 6.7 ºC).

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“…Varios autores han mostrado que existe una gran reducción en la DQO con baja conversión de biomasa cuando el consumo de moléculas simples, tales como acetato, glucosa y ácidos orgánicos ocurre en ausencia de luz (Francisco et al, 2015;Vieira et al, 2012). Esto sugiere la existencia de un metabolismo microalgal capaz de proporcionar un crecimiento lento en la oscuridad, lo que explica la gran remoción de DQO, aunque con baja conversión de biomasa La eliminación sustancial de nutrientes evidenciados en el proceso, es una característica del metabolismo de las microalgas heterótrofas que convierte simultáneamente estos contaminantes en un único biorreactor, provocando alivio en el tratamiento terciario de aguas residuales.…”

Section: Resultados Y Discusiónunclassified

Producción de pigmentos naturales (clorofila-a) en biorrefinerias agroindustriales

Streit

Jacob‐Lopes

Zepka

et al. 2016

cyt

Self Cite

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El objetivo del trabajo fue evaluar la producción de clorofila-a por Aphanothece microscópica Nägeli a partir de efluentes de procesamiento de productos lácteos dentro del ámbito de una biorrefinería. Los experimentos se realizaron en biorreactores mediante cultivo heterotrófico en condiciones de pH 7.60, temperatura de 20º C y aireación continua de 1 VVM. A partir de un diseño experimental 23 se evaluó las variables concentración de inóculo (100, 200 e 300 mg L-1), relación carbono/nitrógeno (C/N) (20, 40 y 60) y relación nitrógeno/fosforo (N/P) (5, 10 y 15). Los resultados obtenidos demostraron el efecto de las variables en estudio para la producción de clorofila-a, indicando la posibilidad de producir hasta 4765.5 µgclorofila-a L-1d-1. Esta producción se basó en la conversión de los contaminantes presentes en las aguas residuales, donde se evidenció la conversión de 96.90% de materia orgánica, 73.5% de nitrógeno total y 89.80% de fósforo total del efluente.

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From waste-to-energy: the process integration and intensification for bulk oil and biodiesel production by microalgae

Cited by 31 publications

References 22 publications

Cyanobacteria as an eco‐friendly resource for biofuel production: A critical review

Cyanobacteria as an eco‐friendly resource for biofuel production: A critical review

THIRD GENERATION BIODIESEL PRODUCTION FROM MICROALGAE Phormidium autumnale

Producción de pigmentos naturales (clorofila-a) en biorrefinerias agroindustriales

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