Bioenergy Use from Pavlova lutheri Microalgae

Álvarez, Pablo; Pérez, Leticia; Salgueiro, Jose Luis; Cancela, Ángeles; Sánchez, Ángel; Ortiz, Luis

doi:10.1007/s41742-017-0026-2

Cited by 13 publications

(4 citation statements)

References 27 publications

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“…The carbon products obtained should therefore be mixed with other sources to lower the ash content. This is in concordance with [39], who mixed Pavlova lutheri, which has an ash content of 34.5%, with Miscanthus, a herbaceous plant.…”

Section: Samplesupporting

confidence: 89%

Hydrothermal Carbonization and Pellet Production from Egeria densa and Lemna minor

Álvarez

Cancela

Freitas

et al. 2020

Plants

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Biofuels are seen as a potential option for mitigating the effects of fossil fuel use. On the other hand, nutrient pollution is accelerating eutrophication rates in rivers, lakes, and coastal waters. Harvesting aquatic plants to produce biofuels could mitigate this problem, though it is important to attack the problem at source, mainly as regards the contribution of nutrients. For the first time, solid biofuels were obtained in the forms of carbon and pellets from the aquatic plants Egeria densa, which is classed as an invasive plant under the Spanish Catalogue of Exotic Invasive Species, and Lemna minor, both of which can be found in the Umia River in north-west Spain. The essential oils and macro- and microelements present in both these plants were also extracted and analyzed. The higher heating values (HHVs) of the carbon products obtained ranged from 14.28 to 17.25 MJ/kg. The ash content ranged from 22.69% to 49.57%. The maximum yield obtained for biochar for Egeria densa at 200 °C was 66.89%. Temperature significantly affects solid hydrochar yield. The HHVs of the pellets obtained ranged from 11.38 to 13.49 MJ/kg. The use of these species to obtain biofuels through hydrothermal carbonization (HTC) and pellets is a novel and effective approach that will facilitate the removal of nutrients that cause eutrophication in the Umia River. The elements extracted show that harvesting these plants will help to remove excessive nutrients from the ecosystem.

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Section: Samplesupporting

confidence: 89%

Hydrothermal Carbonization and Pellet Production from Egeria densa and Lemna minor

Álvarez

Cancela

Freitas

et al. 2020

Plants

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“…Moreover, the work of Arriada and Abreu (2014) demonstrated the bioremediation potential of N. oculata by growing this strain in produced water (PW) generated from oil production. The high growth rate and high concentration of the essential polyunsaturated fatty acids, EPAs, and docosahexaenoic acids (DHAs), were also demonstrated for P. lutheri that make it of great biotechnological potential for biodiesel production (Green, 1975;Volkman et al, 1991;Meireles et al, 2003;Amaro et al, 2011;Shah et al, 2014;Alvarez et al, 2017). However, these microalgae species have not been yet examined in detail with respect to the bacterial communities that could co-exist with them.…”

Section: Introductionmentioning

confidence: 99%

Hydrocarbon-Degrading Bacteria Alcanivorax and Marinobacter Associated With Microalgae Pavlova lutheri and Nannochloropsis oculata

et al. 2020

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Marine hydrocarbon-degrading bacteria play an important role in natural petroleum biodegradation processes and were initially associated with man-made oil spills or natural seeps. There is no full clarity though on what, in the absence of petroleum, their natural niches are. Few studies pointed at some marine microalgae that produce oleophilic compounds (alkanes, long-chain fatty acids, and alcohols) as potential natural hosts of these bacteria. We established Dansk crude oil-based enrichment cultures with photobioreactor-grown marine microalgae cultures Pavlova lutheri and Nannochloropsis oculata and analyzed the microbial succession using cultivation and SSU (16S) rRNA amplicon sequencing. We found that petroleum enforced a strong selection for members of Alpha-and Gamma-proteobacteria in both enrichment cultures with the prevalence of Alcanivorax and Marinobacter spp., well-known hydrocarbonoclastic bacteria. In total, 48 non-redundant bacterial strains were isolated and identified to represent genera Alcanivorax, Marinobacter, Thalassospira, Hyphomonas, Halomonas, Marinovum, Roseovarius, and Oleibacter, which were abundant in sequencing reads in both crude oil enrichments. Our assessment of public databases demonstrated some overlaps of geographical sites of isolation of Nannochloropsis and Pavlova with places of molecular detection and isolation of Alcanivorax and Marinobacter spp. Our study suggests that these globally important hydrocarbon-degrading bacteria are associated with P. lutheri and N. oculata.

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“…Switching the nutrition pattern to heterotrophic and/or mixotrophic behaviour may also improve biodiesel production [12][13][14]. Palmitic, Stearic, Oleic, Linoleic, and Linolenic fatty acids are the most abundant fatty acid methyl esters present in algae [15,16], which are known to be the predominant ingredient of biodiesel. Since the fatty acids profile of certain oil could be an indicator of biodiesel quality, the fuel properties of biodiesel are logically influenced by the properties of the individual fatty esters in biodiesel.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of biodiesel production from the green microalga Micractinium reisseri via optimization of cultivation regimes

El‐Sheekh

El-Mohsnawy

Mabrouk

et al. 2020

Journal of Taibah University for Science

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The present work introduces a new strategy for enhancing a sustainable biodiesel from Micractinium reisseri by combining mixotrophic nutrition with nutrients stresses. Cultivating of Micractinium reisseri in 25 mg/l promoted lipid yield reaching 206%. While mixotrophic nutrition by 0.1 M glycerol promoted dry weight by 2.8 folds, 0.05 M glycerol enhanced lipid yield by 26% only. However, supplementation algal culture by 1 g/l sugarcane molasses promoted lipid content by 61% and total lipid yield by 31%. While polyunsaturated fatty acids (PUSFA) reduced from 48% to 31%, monounsaturated fatty acids (MUSFA) increased from 14% to 30% and Oleic and Stearic acids increased by 383% and 284%, respectively under optimized conditions. Evaluation of the produced biodiesel by monetarystandard EN 14214 and ASTM D-6751 analysis exhibited high-quality products. Combining mixotrophic nutrition with salts and nitrogen stresses led to encouragement switching the metabolic pathways towards lipid output that used as a biodiesel source. ARTICLE HISTORY

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Bioenergy Use from Pavlova lutheri Microalgae

Cited by 13 publications

References 27 publications

Hydrothermal Carbonization and Pellet Production from Egeria densa and Lemna minor

Hydrothermal Carbonization and Pellet Production from Egeria densa and Lemna minor

Hydrocarbon-Degrading Bacteria Alcanivorax and Marinobacter Associated With Microalgae Pavlova lutheri and Nannochloropsis oculata

Enhancement of biodiesel production from the green microalga Micractinium reisseri via optimization of cultivation regimes

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