Oil extraction from Scenedesmus obliquus using a continuous microwave system – design, optimization, and quality characterization

Balasubramanian, Sundaravadivel; Allen, James D.; Kanitkar, Akanksha; Boldor, Dorin

doi:10.1016/j.biortech.2010.09.119

Cited by 239 publications

(112 citation statements)

References 41 publications

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“…Sonification and high pressure homogenization (French press) are standard methods for disruption of algal and bacterial cells in protein purification. Microwave irradiation gains significance in lipid extraction from algae for biofuel production [13,16]. For French press and microwave no comparative data of algal fermentation after cell disruption is available.…”

Section: Discussionmentioning

confidence: 99%

Influence of Different Cell Disruption Techniques on Mono Digestion of Algal Biomass

Schwede¹,

Kowalczyk²,

Gerber³

2011

Linköping Electronic Conference Proceedings

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Due to high growth rates microalgae provide an enormous potential as a source for biomass besides conventional energy crops. The algal biomass can be used for bioenergy production. Anaerobic digestion to biogas is one of the most energy-efficient and environmentally beneficial technologies for alternative energy carrier production. The resistance of the algal cell wall is generally a limiting factor for cell digestibility. In the present work different cell disruption techniques (microwave heating; heating for 8 hours at 100°C; freezing over night at -15°C; French press; ultrasonic) on algal biomass of Nannochloropis salina were carried out. The disrupted material was digested to biogas in batch experiments according to VDI 4630. The results indicate that hydrolysis of algal cells is the rate-limiting step in anaerobic digestion of algal biomass. Cell disruption by heating, microwave and French press show a considerable increase in specific biogas production and degradation rate. Compared to the untreated sample the specific biogas production was increased for the heating approach by 58 %, for the microwave by 40 % and for the French press by 33 %.

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Section: Discussionmentioning

confidence: 99%

Influence of Different Cell Disruption Techniques on Mono Digestion of Algal Biomass

Schwede¹,

Kowalczyk²,

Gerber³

2011

Linköping Electronic Conference Proceedings

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“…Continuous microwave systems for oil extraction from Scenedesmus obliquus were significantly affected by time and temperature. However, quality of the oil was reported high [53].…”

Section: Microwave Treatmentmentioning

confidence: 99%

An Insight on Algal Cell Disruption for Biodiesel Production

Aarthy

Smita

Turkar

et al. 2018

Asian J Pharm Clin Res

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Objective: This review article deals with the effect that various cell disruption techniques have on the efficiency of lipid extraction. We have reviewed existing algal cell disruption techniques that aid the biodiesel production process.Methods: Current rise in demand for energy has led the researcher to focus on the production of sustainable fuels, among which biodiesel has received greater attention. This is due to its larger lipid content, higher growth rate, larger biomass production, and lower land use. Extraction of lipid from algae (micro and macro) for the production of biodiesel involves numerous downstream processing steps, of which cell wall disruption is a crucial step. Bead milling, high-pressure homogenization, ultra-sonication, freeze-drying, acid treatment, and enzymatic lysis are some methods of cell disruption. The cell disruption technique needs to be optimized based on the structure and biochemical composition of algae. Result:The lipid extraction efficiency varies depending on the algal species and the cell disruption technique used. Conclusion:In-depth research and development of new techniques are required to further enhance the cell disruption of the algal cell wall for the enhanced recovery of lipids. In addition, the operating costs and energy consumption should also be optimized for the cost-effective recovery.

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“…Cravotto et al (2008) applied organic solvent extraction with n-hexane and microwave-assisted solvent extraction (using the same solvent) to the microalgae Crypthecodinium cohnii, achieving oil recovery yields of 4.8 and 17.8%, respectively. Recently, Balasubramanian et al (2011) promoted the cell wall disruption of Scenedesmus obliquus using the microwaveassisted method for oil extraction. Oil analysis indicated that microwave-extracted oil contained higher percentages of unsaturated and essential fatty acids (indicating higher quality) than that extracted without pretreatment.…”

Section: Microwavementioning

confidence: 99%

A Review: Microalgae and Their Applications in CO2 Capture and Renewable Energy

Klinthong

Yang

Huang

et al. 2015

Aerosol Air Qual. Res.

203

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Fossil fuels, which are recognized as unsustainable sources of energy, are continuously consumed and decreased with increasing fuel demands. Microalgae have great potential as renewable fuel sources because they possess rapid growth rate and the ability to store high-quality lipids and carbohydrates inside their cells for biofuel production. Microalgae can be cultivated on opened or closed systems and require nutrients and CO 2 that may be supplied from wastewater and fossil fuel combustion. In addition, CO 2 capture via photosynthesis to directly fix carbon into microalgae has also attracted the attention of researchers. The conversion of CO 2 into chemical and fuel (energy) products without pollution via this approach is a promising way to not only reduce CO 2 emissions but also generate more economic value. The harvested microalgal biomass can be converted into biofuel products, such as biohydrogen, biodiesel, biomethanol, bioethanol, biobutanol and biohydrocarbons. Thus, microalgal cultivation can contribute to CO 2 fixation and can be a source of biofuels. This article reviews the literature on microalgae that were cultivated using captured CO 2 , technologies related to the production of biofuels from microalgae and the possible commercialization of microalgae-based biofuels to demonstrate the potential of microalgae. In this respect, a number of relevant topics are addressed: the nature of microalgae (e.g., species and composition); CO 2 capture via microalgae; the techniques for microalgal cultivation, harvesting and pretreatment; and the techniques for lipid extraction and biofuel production. The strategies for biofuel commercialization are proposed as well.

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Oil extraction from Scenedesmus obliquus using a continuous microwave system – design, optimization, and quality characterization

Cited by 239 publications

References 41 publications

Influence of Different Cell Disruption Techniques on Mono Digestion of Algal Biomass

Influence of Different Cell Disruption Techniques on Mono Digestion of Algal Biomass

An Insight on Algal Cell Disruption for Biodiesel Production

A Review: Microalgae and Their Applications in CO2 Capture and Renewable Energy

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