Effects of co-products on the life-cycle impacts of microalgal biodiesel

Soratana, Kullapa; Barr, William J.; Landis, Amy E.

doi:10.1016/j.biortech.2014.02.070

Cited by 44 publications

(25 citation statements)

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“…Although algal oil for third generation biodiesel production has been the subject of much research and a major driver for technological innovations in recent years, by most assessments it is still not economically viable [2][3][4]. Consequently, algal products/coproducts resulting from biofuel applications have been identified in Canada and elsewhere as a priority for investigation as valuable commodities for revenue generation and sustainable replacement of terrestrial livestock and aquaculture feed inputs [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

In vitro digestion of microalgal biomass from freshwater species isolated in Alberta, Canada for monogastric and ruminant animal feed applications

et al. 2016

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READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/copyright Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/view/object/?id=bced7503-7e47-4b06-8011-600c65ad0b5e http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/voir/objet/?id=bced7503-7e47-4b06-8011-600c65ad0b5eIn vitro digestion of microalgal biomass from freshwater species isolated in Alberta, Canada for monogastric and ruminant animal feed applications In vitro digestion studies were conducted to examine the potential nutritional value of whole (WAB) and lipidextracted biomass (LEB) from freshwater microalgae from Alberta, Canada. For WAB, protein solubility (PS) was statistically highest and the same (P = 0.109) for Chlorella vulgaris at 84% and Micractinium reisseri at 78%, lowest (P b 0.001) for Nannochloris bacillaris at 64% and intermediate for Tetracystis sp. at 73%. Dilute pepsin digestibility (DPD) was highest (P b 0.001) for C. vulgaris at 80% and lowest (P b 0.001) for N. bacillaris and Tetracystis sp. at 60-64%, which were the same (P = 0.075) and M. reisseri was intermediate at 72%. Twophase gastric/pancreatic digestibility of protein (GPD Protein ) and energy (GPD Energy ) were highest (P b 0.001) for M. reisseri at 78 and 57%, respectively, lowest (P b 0.001) for N. bacillaris and Tetracystis sp. at 49-52 and 41-43%, respectively, which were the same (P = 0.101 and 0.058, respectively) and C. vulgaris was intermediate at 69 and 52%, respectively. For LEB, PS was highest (P b 0.001) and the same (P = 0.088) for C. vulgaris and M. reisseri at 72-76%; which were higher (P b 0.001) than N. bacillaris and Tetracystis sp. at 60-62%, which were the same (P = 0.405). Similarly, DPD was highest (P b 0.001) and the same (P = 1.000) for C. vulgaris and M. reisseri both at 69%; which were higher (P b 0.001) than N. bacillaris and Tetracystis sp. at 58-62%, which were the same (P = 0.083). GPD Protein was highest (P b 0.001) and the same (P = 0.944) for M. reisseri and C. vulgaris at 79-80%, lowest (P b 0.001) for N. bacillaris at 50% and intermediate for Tet...

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Section: Introductionmentioning

confidence: 99%

In vitro digestion of microalgal biomass from freshwater species isolated in Alberta, Canada for monogastric and ruminant animal feed applications

et al. 2016

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“…With a rapidly growing biofuel sector and expanding production of microalgae for other commercial purposes, it is expected that large quantities of algal products/co-products could become available in the near future [2]. Although algal oil for thirdgeneration biodiesel production has been the subject of much research and a major driver for technological innovations in recent years, by all assessments it is not economically viable [3][4][5]. Utilization of the entire algal crop through a balanced biorefinery approach that effectively maintains the quality of various fractions has the potential to reduce the processing costs of each product and is likely the only feasible strategy to increase the viability of a microalgae industry [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Biochemical characterization of microalgal biomass from freshwater species isolated in Alberta, Canada for animal feed applications

et al. 2015

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“…There is currently considerable effort in researching species with improved lipid production for technologies that require biodiesel; however, the yield is still not economically viable (Clarens et al, 2010;Milledge, 2011;Soratana et al, 2014). Current yields are estimated at between $9 and $25 USD per gallon of oil extracted from cultivation in open ponds and between $15 and $40 per gallon of the same oil extracted from microalgae grown in closed photobioreactors (Kirrolia et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Nutritional value changes in response to temperature, microalgae mono and mixed cultures

et al. 2019

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Aim The response of mixed cultures and monocultures of Pseudopediastrum boryanum (Turpin) E. Hegewald and Scenedesmus obliquus (Turpin) Kützing was assessed in the laboratory at three different temperatures: 20, 30 and 40 °C. The change in biomass and biochemical composition of these cultures was evaluated. Methods Microalgae were placed in a batch culture over 21-days in ASM1 medium. Cell density was directly counted every two days using a Fuchs-Rosenthal hemocytometer. Chlorophyll ‘a’ and total carotenoids were extracted twice. Protein, carbohydrate, total lipid and fatty acid contents were determined at the end of the experiment. Results Cultures grown in 40 °C exhibited no growth. However, there was increased cell density (13.6 x 106 cell.mL-1) and biomass (55 g.L-1) in the S. obliquus monoculture at 30 °C. High protein concentrations (672.6 mg.g-1) were observed in monocultures P. boryanum and S. obliquus at 20 °C treatments. There were high carbohydrate concentrations (6.17 mg.g-1) in P. boryanum unialgal at 30 °C. There was no significant difference in total lipid content between S. obliquus (95.5 mg.g-1), P. boryanum (96.3 mg.g-1) and the mixed culture at 20 °C (105.3 mg.g-1). FAMEs varied significantly regarding the number of unsaturated components, which predominantly consisted of fatty acids with two or more unsaturated bonds. Conclusions The biomass of the treatments analyzed was rich in proteins and essential fatty acids (such as linolenic acid), yet low in carbohydrate content, suggesting its potential use as a food supplement. Our results indicate that mixed culture of P. boryanum and S. obliquus was inefficient in cultivating biomass or biochemical compounds as compared to the unialgal cultivations. However, algae grown together showed better stability in their biochemical composition in response to changes in temperature, an important factor for microalgae production in open ponds and in food safety measures. These results suggest the consortia among different species of microalgae should be tested to determine better methodologies for the production of biomass and metabolites with greater stability towards environmental factors.

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Effects of co-products on the life-cycle impacts of microalgal biodiesel

Cited by 44 publications

References 14 publications

In vitro digestion of microalgal biomass from freshwater species isolated in Alberta, Canada for monogastric and ruminant animal feed applications

In vitro digestion of microalgal biomass from freshwater species isolated in Alberta, Canada for monogastric and ruminant animal feed applications

Biochemical characterization of microalgal biomass from freshwater species isolated in Alberta, Canada for animal feed applications

Nutritional value changes in response to temperature, microalgae mono and mixed cultures

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