Potential Outdoor Cultivation of Green Microalgae Based on Response to Changing Temperatures and by Combining with Air Temperature Occurrence

Maroubo, Lucas Alves; Andrade, Diva Souza; Caviglione, João Henrique; Lovato, Gisele Milani; Nagashima, Getúlio Takashi

doi:10.1007/s12155-018-9931-2

Cited by 6 publications

(3 citation statements)

References 49 publications

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“…Према Khan et al (2018), биoмaсa микрoaлги је oбнoвљив, oдржив и eкoнoмичaн извoр сирoвина зa добијање биoeнeргиjе. Taкoђe, aлгe имajу вишe уљa у oднoсу нa другe гајене биљке (Chisti 2007), њихoв прoцeс узгoja je лaкши, a нa њих нe утичу сeзoнски и климaтски услoви (Maroubo et al 2018). Mикрoaлгe сe мoгу прилaгoдити пустињским услoвимa и имajу нeкoликo прeднoсти, кao штo je узгoj у нajлoнским врeћaмa или рeзeрвoaримa у близини eлeктрaнa кoje eмитуjу угљeн-диoксид (Yasar 2020), jeр сe oвaj гaс мoжe кoристити зa пoбoљшaњe прoизвoдњe биoмaсe микрoaлги.…”

Section: истOријат коришћења биомасеunclassified

Biomass as a renewable energy source

Тrkulја,

Lеvić,

Pržulј

et al. 2023

ORUPRS

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Conventional energy sources such as fossil fuels, oil, coal and natural gas methane are non-renewable energy sources that were once considered primary energy sources and are depleted due to intensive use which has led to the escalation of the global energy crisis. In addition, the use of fossil fuels has a significant disadvantage in terms of the emission of toxic and harmful gases into the atmosphere that pollute the environment. An alternative to the use of fossil fuels is to obtain energy by processing biomass obtained in the process of photosynthesis and used as a raw material for bioenergy production. Biomass refers to non-fossilized biological material obtained from living or until recently living organisms and biodegradable organic or carbon-based material originating from plants, animals, plant materials and microorganisms. Bioenergy can be defined as a source of energy obtained from organic matter or biomass that is explicitly used for energy purposes. Bioenergy is the largest renewable energy source in the world, which still has a large share in the supply of renewable energy sources and accounts for 70% of the total supply of renewable energy sources. Today, bioenergy is the only form of energy that meets the criteria of a closed system, in terms of the creation of carbon dioxide and solid material products of combustion. Most of the carbon released in the form of carbon dioxide is absorbed by the next generation of plants through photosynthesis or through minerals from the soil. Therefore, biomass is becoming one of the key energy resources in the fight against global warming and depletion of fossil fuel reserves. It should be noted that the primary advantage of biomass as an energy source is not in its significant potential, but in renewability. Renewability is the essential advantage that biomass has over conventional, fossil fuels that are nonrenewable and therefore cannot be the basis for long-term planning of sustainable growth that implies rational use of energy. Biomass is not a source of energy in transition, as it is often presented, but a resource that is becoming increasingly important as a modern energy source. Therefore, this chapter provides a detailed overview of biomass as the world’s largest source of renewable energy, including definitions of biomass, a history of biomass use, and current bioenergy production from biomass. Data on theclassification/categorization of biomass and the main methods for the production of bioenergy from biomass, as well as the advantages and disadvantages of using biomass for bioenergy production, are presented. Emphasis is placed on the impact of biomass on the environment and biodiversity, as well as the most significant current challenges in the use of biomass for bioenergy production, including moisture content and density of biomass, its complexity and diversity, selection of optimal pre-treatment methods and biomass processing conditions and lack of biomass data, as well as challenges to the economic sustainability of bioenergy production from biomass and other environmental, economic and social challenges.

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Section: истOријат коришћења биомасеunclassified

Biomass as a renewable energy source

Тrkulја,

Lеvić,

Pržulј

et al. 2023

ORUPRS

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“…The pigment extraction procedures were conducted as described by Maroubo et al [30] with slight modifications. Briefly, an aliquot of 3 mL of N. oleoabundans culture was centrifuged for 10 min at 9000 x g in a refrigerated centrifuge (Hermle, Z 383 K) at 25 °C.…”

Section: Pigmentsmentioning

confidence: 99%

Microalgae Biomass and Bioactive Compounds Change According to the Medium's N and pH

Silva,

Prete,

Bertoldo

et al. 2023

Braz. arch. biol. technol.

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Microalgae have been widely studied as raw materials for biofuels, food supplements and several high value products. The hypothesis is that the pH and N levels in the culture medium are important factors to increase microalgae biomass production and its by-products. Thus, this study aimed to evaluate response of Neochloris oleoabundans to sodium nitrate concentration and pH levels by assessing biomass production, pigments, total lipid content and lipid profile of cells. The experimental design was a complete factorial with two factors: sodium nitrate (NaNO3) using the doses of 0.25, 1.12 and 2.5 g L -1 and pH 5.0, 7.0 and 9.0, resulting in nine treatments and three replicates. Differences in the N concentration and pH of the in Bold's basal medium increased up to 21.1% the production of dry biomass but also up to 36% of lipids and up to of 0.81% of carotenoid concentration in the N. oleoabundans cell. The nuclear magnetic resonance (NMR) analysis of bio-oil showed changes in the lipid profile. Oil extracted from N. oleoabundans cells growing in medium at pH 9 and in 2.5 g L −1 of NaNO3 showed fatty acids with molecular weights similar to crude soybean oil, while the oil from treatment 3 (2.5 NaNO3 g L −1 ) showed a slight increase in molecular weight. Overall, the best adjustment of the liquid medium to grow N. oleoabundans is at pH 9.0 and with addition of 2.5 g of sodium nitrate. HIGHLIGHTS• Variation of N levels and the pH of the medium improves growth of N. oleoabundans.• N is an important factor on the lipid content of N. oleoabundans.• N. oleoabundans produces higher chlorophyll content at pH 9.• N. oleoabundans produces lipids with saponification values similar to soybean oil.• There is interaction of pH and sodium nitrate on the response of N. oleoabundans.

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“…In addition, environmental conditions need to be kept constant, which may lead to high costs in terms of both energy and labor (Cooper and Smith, 2015). In outdoor conditions, daily and seasonal ambient temperature variations can affect productivity and stability of the system (Maroubo et al, 2018;Gupta et al, 2019). Temperatures outside of the microalgal strains optimal temperature range can alter the enzymatic processes in microalgae leading to changes in biomass productivity and quality (Ras et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Functional Diversity Facilitates Stability Under Environmental Changes in an Outdoor Microalgal Cultivation System

Mattsson

Sörenson

Capo

et al. 2021

Front. Bioeng. Biotechnol.

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Functionally uniform monocultures have remained the paradigm in microalgal cultivation despite the apparent challenges to avoid invasions by other microorganisms. A mixed microbial consortium approach has the potential to optimize and maintain biomass production despite of seasonal changes and to be more resilient toward contaminations. Here we present a 3-year outdoor production of mixed consortia of locally adapted microalgae and bacteria in cold temperate latitude. Microalgal consortia were cultivated in flat panel photobioreactors using brackish Baltic Sea water and CO2 from a cement factory (Degerhamn, Cementa AB, Heidelberg Cement Group) as a sustainable CO2 source. To evaluate the ability of the microbial consortia to maintain stable biomass production while exposed to seasonal changes in both light and temperature, we tracked changes in the microbial community using molecular methods (16S and 18S rDNA amplicon sequencing) and monitored the biomass production and quality (lipid, protein, and carbohydrate content) over 3 years. Despite changes in environmental conditions, the mixed consortia maintained stable biomass production by alternating between two different predominant green microalgae (Monoraphidium and Mychonastes) with complementary tolerance to temperature. The bacterial population was few taxa co-occured over time and the composition did not have any connection to the shifts in microalgal taxa. We propose that a locally adapted and mixed microalgal consortia, with complementary traits, can be useful for optimizing yield of commercial scale microalgal cultivation.

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Potential Outdoor Cultivation of Green Microalgae Based on Response to Changing Temperatures and by Combining with Air Temperature Occurrence

Cited by 6 publications

References 49 publications

Biomass as a renewable energy source

Biomass as a renewable energy source

Microalgae Biomass and Bioactive Compounds Change According to the Medium's N and pH

Functional Diversity Facilitates Stability Under Environmental Changes in an Outdoor Microalgal Cultivation System

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