Selenastrum Capricornutum a New Strain of Algae for Biodiesel Production

Pugliese, Annarita; Biondi, Lorenzo; Bartocci, Pietro; Fantozzi, Francesco

doi:10.3390/fermentation6020046

Cited by 25 publications

(11 citation statements)

References 35 publications

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“…This system is normally used to cultivate microalgae for the production of protein, fatty acids, pigments, animal feed, and antioxidants in large-scale. Example of microalgal species that have been tested to grow in photobioreactors are Chlorella vulgaris, Chlorella sarokiniana, Arthrospira platensis, Nannochloropsis sp., Phorphyridium cruentum, Selenastrum capricornutum, Haematococcus pluvialis, and Phaeodactylum tricornotum, among others [40,45]. Specifically, photobioreactors allow higher volumetric productivity for the enhanced capture of radiant energy, depending on microalgal strains and scales used.…”

Section: Closed Photobioreactormentioning

confidence: 99%

Microalgal Biomass Generation via Electroflotation: A Cost-Effective Dewatering Technology

et al. 2020

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Microalgae are an excellent source of bioactive compounds for the production of a wide range of vital consumer products in the biofuel, pharmaceutical, food, cosmetics, and agricultural industries, in addition to huge upstream benefits relating to carbon dioxide biosequestration and wastewater treatment. However, energy-efficient, cost-effective, and scalable microalgal technologies for commercial-scale applications are limited, and this has significantly impacted the full-scale implementation of microalgal biosystems for bioproduct development, phycoremediation, and biorefinery applications. Microalgae culture dewatering continues to be a major challenge to large-scale biomass generation, and this is primarily due to the low cell densities of microalgal cultures and the small hydrodynamic size of microalgal cells. With such biophysical characteristics, energy-intensive solid–liquid separation processes such as centrifugation and filtration are generally used for continuous generation of biomass in large-scale settings, making dewatering a major contributor to the microalgae bioprocess economics. This article analyzes the potential of electroflotation as a cost-effective dewatering process that can be integrated into microalgae bioprocesses for continuous biomass production. Electroflotation hinges on the generation of fine bubbles at the surface of an electrode system to entrain microalgal particulates to the surface. A modification of electroflotation, which combines electrocoagulation to catalyze the coalescence of microalgae cells before gaseous entrainment, is also discussed. A technoeconomic appraisal of the prospects of electroflotation compared with other dewatering technologies is presented.

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Section: Closed Photobioreactormentioning

confidence: 99%

Microalgal Biomass Generation via Electroflotation: A Cost-Effective Dewatering Technology

et al. 2020

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“…Microalgae biomass is typically rich in lipids and can be produced throughout the year [19]. It has been reported that these can produce up to 70% of oils with respect to their dry weight in biomass, compared to other oil crops such as palm (36%), sunflower (40%), and jatropha (28%) [2,20], turning microalgae into a potential source for the production of lipids, and a source of biofuels, biolubricants, or other types of compounds of commercial interest.…”

Section: Introductionmentioning

confidence: 99%

Technoeconomic Evaluation of Microalgae Oil Production: Effect of Cell Disruption Method

et al. 2022

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Microalgae have a high capacity to capture CO2. Additionally, biomass contains lipids that can be used to produce biofuels, biolubricants, and other compounds of commercial interest. This study analyzed various scenarios for microalgae lipid production by simulation. These scenarios include cultivation in raceway ponds, primary harvest with three flocculants, secondary harvest with pressure filter (and drying if necessary), and three different technologies for the cell disruption step, which facilitates lipid extraction. The impact on energy consumption and production cost was analyzed. Both energy consumption and operating cost are higher in the scenarios that consider bead milling (8.79–8.88 kWh/kg and USD 41.06–41.41/kg), followed by those that consider high-pressure homogenization (HPH, 5.39–5.46 kWh/kg and USD 34.26–34.71/kg). For the scenarios that consider pressing, the energy consumption is 5.80–5.88 kWh/kg and the operating cost is USD 27.27–27.88/kg. The consumption of CO2 in scenarios that consider pressing have a greater capture (11.23 kg of CO2/kg of lipids). Meanwhile, scenarios that consider HPH are the lowest consumers of fresh water (5.3 m3 of water/kg of lipids). This study allowed us to develop a base of multiple comparative scenarios, evaluate different aspects involved in Chlorella vulgaris lipid production, and determine the impact of various technologies in the cell disruption stage.

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“…Additionally, in later studies, Knothe added that significantly high amount of myristic acid (C14:0), palmitic acid (C16:0) and palmitoleic acid (C16:1) in an algal lipid will help in meeting the biodiesel standard requirement (Knothe 2011;Knothe 2013;Knothe and Razon 2017). Oils high in oleic acid (C18:1), in particular, have been observed to have a good fuel balance, including ignition quality, combustion heat, cold filter plugging point, oxidative stability, viscosity, and lubricity (Pugliese et al, 2020). As a result, the seven types of FAs stated above, which range from C 14 to C 18 , are referred to as the desirable FAs in this study and are utilized as the reference FAs in establishing the suitability of an algal FAs profile for biodiesel generation.…”

Section: Introductionmentioning

confidence: 99%

Selection of Tropical Microalgae Species for Mass Production Based on Lipid and Fatty Acid Profiles

et al. 2022

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Numerous recent studies have identified microalgae biofuel as one of the major renewable energy sources for sustainable development due to their high biomass productivity, high lipid content, and availability of locally adapted strains in various geographical locations. There have been minimal studies on the fatty acid composition of lipid production on local microalgae species in Sabah, Malaysia. Thus, screening for local microalgae species capable of producing biodiesel can aid in the selection of suitable species. This study aimed to isolate and identify promising local microalga as biodiesel feedstock for mass cultivation. Eight microalgae species, Acutodesmus obliquus, Chaetoceros muelleri, Isochrysis galbana, Ankistrodesmus falcatus, Chlamydomonas monadina, Chlorella emersonii, Nannochloropsis oculata, and Tetraselmis chuii, were successfully isolated and identified from Kota Kinabalu, Sabah. The isolated microalgae were characterized based on the lipid/biomass productivity, lipid content and fatty acid profiles. These isolates had biomass productivity of 0.11–0.78 g/L/day, lipid content of 11.69–39.00% dry weight, and lipid productivity of 21.11–252.64 mg/L/day. According to GC-MS analyses, four isolates produced more than 80% of C14–C18 fatty acids, which were A. falcatus (95%), C. emersonii (93%), A. obliquus (91%), and C. muelleri (81%). Despite its low biomass productivity, C. muelleri was chosen as the best biodiesel species candidate because of its moderately high lipid productivity (42.90 mg/L/day), highest lipid content (39% dry weight), high level of MUFAs and C14–C18 FAs (81.47%), with the highest oleic acid proportion (28.38%), all of which are desirable characteristics for producing high-quality biodiesel.

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Selenastrum Capricornutum a New Strain of Algae for Biodiesel Production

Cited by 25 publications

References 35 publications

Microalgal Biomass Generation via Electroflotation: A Cost-Effective Dewatering Technology

Microalgal Biomass Generation via Electroflotation: A Cost-Effective Dewatering Technology

Technoeconomic Evaluation of Microalgae Oil Production: Effect of Cell Disruption Method

Selection of Tropical Microalgae Species for Mass Production Based on Lipid and Fatty Acid Profiles

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