RETRACTED: Potential carbon dioxide fixation by industrially important microalgae

Sydney, Eduardo Bittencourt; Sturm, Wilerson; Carvalho, Júlio César de; Soccol, Vanete Thomaz; Larroche, Christian; Pandey, Ashok; Soccol, Carlos Ricardo

doi:10.1016/j.biortech.2010.02.088

Cited by 441 publications

(153 citation statements)

References 24 publications

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“…Had the N-to-P factor of N× 4.78 been used, the CP content of these products would be 53 % DW basis, which more closely resembles values reported here (53-5 6%o fD W ) .O ft h em i c r o a l g a es t u d i e d , P. tricornutum, B. braunii (A), and T. chuii had the highest CP levels (>40 %). P. tricornutum and B. braunii (A) had virtually the same crude protein content (average 39.7 %) which is in agreement with the value (39.6 %) reported by Sydney et al (2010)forB. braunii.…”

Section: Discussionsupporting

confidence: 88%

Chemical composition and nutritional properties of freshwater and marine microalgal biomass cultured in photobioreactors

2014

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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=b8564d17-860a-4eb5-80c6-fd741c419b07 http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/voir/objet/?id=b8564d17-860a-4eb5-80c6-fd741c419b07 Abstract Proximate, amino acid and elemental composition, total phenolic content (TPC), and in vitro protein digestibility (IVPD) of microalgal biomass were determined. Microalgae contained low to moderate ash (5-17 %), moderate to high carbohydrate (18-46 %), crude protein (18-46 %), high crude lipid (12-48 %), and energy (19-27 MJ kg −1 ). Characteristic of microalgae, non-essential amino acids (AAs), aspartic and glutamic acids, were predominant (20-30 % of protein; 8-12 % of dry weight). Microalgae had favorable essential AA profiles with high essential amino acid (EAA) indices (0.9-1.2). Expressed as gE A A1 0 0gp r o t e i n −1 , Porphyridium aerugineum was rich in leucine (11.9), lysine (8.0), arginine (8.6), and tryptophan (3.3); Nannochloropsis granulata (A) in leucine (11.0), lysine (8.5), and tryptophan (2.8); Tetraselmis chuii and Botryococcus braunii in arginine (9.4 and 20.5, respectively); and Phaeodactylum tricornutum in lysine (6.4) and tryptophan (2.6). Mineral compositions (%) were calcium (0.1-3.0), magnesium (0.3-0.7), phosphorous (0.7-1.5), potassium (0.7-2.4), sodium (0.8-2.7), and sulfur (0.4-1.4), and trace element compositions (mg kg −1 )we reco pp er(1 8 -102), iron (1,395-11,101), manganese (45-454), selenium (0-0.5), and zinc (28-64). Microalgae contained low TPC (6-13 mg gallic acid equivalents (GAE) g −1 DW), except T. chuii (20 mg GAE g −1 DW). IVPD was high (>90 %) for B. braunii (A), P. aerugineum, and lipid-extracted N. granulata (B); mid-range (80-89 %) for P. tricornutum, N. granulata (A), B. braunii (B), Neochloris oleoabundans, T. chuii, and whole N. granulata (B); and lower (<80 %) for Acutodesmus dimorphus.M i c r o a l g a ls p e c i e sP. tricornutum, B. braunii, N. granulata,a n dT. chuii had high protein (40-52 %), IVPD (82-97 %), and digestible protein (35-50 %), comparable to plant proteins used in animal feeds and aquaculture.

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Section: Discussionsupporting

confidence: 88%

Chemical composition and nutritional properties of freshwater and marine microalgal biomass cultured in photobioreactors

2014

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“…The productivity of the biomass Table 1. Compositions of microalgae based on dry matter (Um and Kim, 2009;Sydney et al 2010;Singh et al, 2012 (Chen et al, 2009), (d) tubular photobioreactor (Carvalho et al, 2006), (e) plastic bag photobioreactor (Richmond, 2008), (f) air-lift loop reactor (Barbosa et al, 2003) and (g) flat plate photobioreactor (Carvalho et al, 2006).…”

Section: Open Systemmentioning

confidence: 99%

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

Klinthong

Yang

Huang

et al. 2015

Aerosol Air Qual. Res.

211

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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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“…There are various carbon dioxide sources that may be used for the fixation process which include industrial waste gases, emitted gas from power plants and from the atmosphere [7]. Some microalgae have higher potential to survive and are capable of fixing carbon dioxide under extreme conditions such as low pH and acidic gases compared to the terrestrial plants that exhibit fatal effects at these conditions [8].…”

Section: Introductionmentioning

confidence: 99%

Cultivation of Efficient Marine Microalgae and Their Biochemical Composition and Its Antibacterial Activity against Human Pathogens

Dineshkumar

Kumaravel

Sampathkumar

2017

JAMB

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The three marine microalgae (Chlorella vulgaris, Spirulina platensis and Nannochloropsis bacillaris) were collected from Vellar estuary, South east coast of India. These three microalgae were cultivated in respective media and estimated their biochemical composition and antibacterial activity. Simultaneously, these cultures were cultivated in flask containing 500 ml of respective media at lab condition for a period of one month and their growth, pH, biomass and CO 2 fixation and carbon content were determined. Based on the growth rate, the pH of three microalgae in media was observed at lab condition. During maximum growth and biomass, the pH was found to be ranged between 9 & 11 for Spirulina platensis, 7 & 9 for Chlorella vulgaris; 8 & 9 for Nannochloropsis bacillaris. Spirulina platensis and Chlorella vulgaris reached maximum growth rate whereas Chlorella vulgaris and Spirulina platensis showed maximum biomass produced. Chlorella vulgaris and Spirulina platensis attained maximum biomass in media at lab condition, also fixed highest level of carbon dioxide in media but they did not produce maximum biomass, though the growth of Nannochloropsis bacillaris were found high in media at lab condition. Among the three microalgae, Chlorella vulgaris and Spirulina platensis produced highest biochemical compounds. Hence Chlorella vulgaris and Spirulina platensis were selected as efficient microalgae for antibacterial activity against human pathogen. This study revealed that certain green algae and blue green microalgae having high growth, pH, CO 2 fixation, carbon content and biochemical composition paves the way for pharmaceutical activity. Antibacterial activity was evaluated for Chlorella and Spirulina with their potential health benefits.

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RETRACTED: Potential carbon dioxide fixation by industrially important microalgae

Cited by 441 publications

References 24 publications

Chemical composition and nutritional properties of freshwater and marine microalgal biomass cultured in photobioreactors

Chemical composition and nutritional properties of freshwater and marine microalgal biomass cultured in photobioreactors

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

Cultivation of Efficient Marine Microalgae and Their Biochemical Composition and Its Antibacterial Activity against Human Pathogens

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