Detergent assisted ultrasonication aided in situ transesterification for biodiesel production from oleaginous yeast wet biomass

Yellapu, Sravan Kumar; Kaur, Rajwinder; Tyagi, Rajeshwar Dayal

doi:10.1016/j.biortech.2016.11.037

Cited by 30 publications

(9 citation statements)

References 35 publications

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“…In view of limitations associated with the homogeneous catalysts, solid heterogeneous catalysts for transesterification reaction are preferable due to their eco-friendly nature and the potential for producing purified biodiesel [13][14][15][16]. To combat these challenges there is a need for possible workout in the production of biodiesel through in-situ transesterification [17,18]. This process implies the direct use of the lipid-rich biomass without prior extraction of the lipids and allowing the transesterification reaction to take place within the solid matrix [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…To combat these challenges there is a need for possible workout in the production of biodiesel through in-situ transesterification [17,18]. This process implies the direct use of the lipid-rich biomass without prior extraction of the lipids and allowing the transesterification reaction to take place within the solid matrix [17][18][19][20]. Biodiesel can be used for same conventional diesel engines regardless of its origin and feedstocks from which it is derived [21].…”

Section: Introductionmentioning

confidence: 99%

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Assessment of fuel properties on the basis of fatty acid profiles of oleaginous yeast for potential biodiesel production

Patel

Arora

Mehtani

et al. 2017

Renewable and Sustainable Energy Reviews

196

100

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A B S T R A C TOver the last decade, there has been a huge upsurge of interest in sustainable production of biomass-based biofuels to fulfill the existing energy demand and simultaneously reducing the environmental deterioration. Earlier, vegetable oils and animal fats were utilized for biodiesel production, but due to food crisis and environmental sustainability, renewable sources such as neutral lipid derived from microbes are gaining much attention for budding biodiesel industries. Among various types of microorganisms, oleaginous yeasts are more promising feedstock to accomplish the current demand of biodiesel production and utilize a large number of cost-effective renewable substrates for their growth and lipid accumulation. However, biodiesel obtained from oleaginous yeasts have certain restrictions regarding their commercial utilization due to their unstable fuel properties such as oxidative stability, cetane number, viscosity and low-temperature performance etc. Numerous articles have been published in the public domain describing the fatty acid profiles of oleaginous yeast as feedstock for biodiesel production. However, the evaluation of quality parameters of biodiesel obtained from oleaginous yeasts is still in infancy. Although there is a huge disparity in a number of papers published for biodiesel production yet the reporting performance on diesel engines need to be verified in details. In this review article, attempt has been made to assess the important biofuel properties on the basis of the fatty acid profile of oleaginous yeast. Thus this evaluation would provide a guideline to the biodiesel producer to improve the production plans related to feedstocks for oleaginous yeast, culture conditions and biodiesel blending.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessment of fuel properties on the basis of fatty acid profiles of oleaginous yeast for potential biodiesel production

Patel

Arora

Mehtani

et al. 2017

Renewable and Sustainable Energy Reviews

196

100

View full text Add to dashboard Cite

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“…as discussed in our earlier study (Yellapu et al, 2017). However, in the case of oil separated using petroleum diesel as a solvent, the obtained FAMEs were analyzed with FT-IR as discussed by Yellapu et al (2018).…”

Section: Q9mentioning

confidence: 98%

Oil extraction from scum and ex situ transesterification to biodiesel

2019

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The aim of this study is to investigate the extraction of oil from scum obtained from a municipal wastewater treatment plant. Various parameters such as solvent volume, temperature, agitation and moisture content were optimized to maximize the oil extraction efficiency using freeze-dried scum. The oil extraction efficiency was compared for each parameter using hexane and petroleum diesel as a solvent. The optimum physical parameters for oil extraction using freeze-dried scum were 75 g solids/L solvent, temperature 60 C, agitation 300 rpm for 60 min, and maximum oil extraction efficiency of 100 and 94.3% w/w was obtained using hexane and petroleum diesel, respectively. The obtained results using 1 g of scum were further validated using 1 kg of wet scum under optimized conditions, and oil extraction efficiency of 94.1 ± 1.3 and 91.3 ± 4.2% w/w was obtained using hexane and petroleum diesel, respectively. Furthermore, ex situ transesterification was performed, and results showed that scum had a higher neutral lipid. In brief, scum is a potential feedstock for the production of biodiesel, and more work on this must be done in future.

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“…Consequently, the FAME yield could reach 73%. Yellapu et al reported that the yield could be further improved by pre-treating the wet biomass with surfactants such as N-lauroyl sarcosine, and the reaction time may also be shortened by carrying out the reaction under sonication [26].…”

Section: Effect Of Moisture On Transesterificationmentioning

confidence: 99%

Microbial Biodiesel Production by Direct Transesterification of Rhodotorula glutinis Biomass

et al. 2018

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1) Background: Lipids derived from oleaginous microbes have become promising alternative feedstocks for biodiesel. This is mainly because the lipid production rate from microbes is one to two orders of magnitude higher than those of energy crops. However, the conventional process for converting these lipids to biodiesel still requires a large amount of energy and organic solvents; (2) Methods: In this study, an oleaginous yeast, Rhodotorula glutinis, was used for direct transesterification without lipid pre-extraction to produce biodiesel, using sulfuric acid or sodium hydroxide as a catalyst. Such processes decreased the amount of energy and organic solvents required simultaneously; (3) Results: When 1 g of dry R. glutinis biomass was subject to direct transesterification in 20 mL of methanol catalyzed by 0.6 M H 2 SO 4 at 70 • C for 20 h, the fatty acid methyl ester (FAME) yield reached 111%. Using the same amount of biomass and methanol loading but catalyzed by 1 g/L NaOH at 70 • C for 10 h, the FAME yield reached 102%. The acid-catalyzed process showed a superior moisture tolerance; when the biomass contained 70% moisture, the FAME yield was 43% as opposed to 34% of the base-catalyzed counterpart; (4) Conclusions: Compared to conventional transesterification, which requires lipid pre-extraction, direct transesterification not only simplifies the process and shortens the reaction time, but also improves the FAME yield.

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Detergent assisted ultrasonication aided in situ transesterification for biodiesel production from oleaginous yeast wet biomass

Cited by 30 publications

References 35 publications

Assessment of fuel properties on the basis of fatty acid profiles of oleaginous yeast for potential biodiesel production

Assessment of fuel properties on the basis of fatty acid profiles of oleaginous yeast for potential biodiesel production

Oil extraction from scum and ex situ transesterification to biodiesel

Microbial Biodiesel Production by Direct Transesterification of Rhodotorula glutinis Biomass

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