Development of Sequential Processes for Multiple Product Recovery from Microalgae

Chandrika, Kethineni; Choragudi, S. F.; Kokkiligadda, Sujana; Nallamothu, Jaswanthi; Ronda, Srinivasa Reddy

doi:10.1089/ind.2017.0029

Cited by 2 publications

(2 citation statements)

References 29 publications

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“…Nagase et al [155] cultivated Dunaliella tertiolecta > 14 days with continuous uptake of NO in the cells, and they concluded that NO first was absorbed in the culture water by diffusion and thereafter diffused into the algae. In addition, NO 2 can be oxidized to nitrite and nitrate in seawater and thereafter taken up by microalgae [156]. When factory fume is added this represents a 125 x increase in the partial pressure of CO 2 in the fume relative to atmosphere concentrations.…”

Section: Discussionmentioning

confidence: 99%

Mass Cultivation of Microalgae: I. Experiences with Vertical Column Airlift Photobioreactors, Diatoms and CO2 Sequestration

et al. 2022

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From 2015 to 2021, we optimized mass cultivation of diatoms in our own developed vertical column airlift photobioreactors using natural and artificial light (LEDs). The project took place at the ferrosilicon producer Finnfjord AS in North Norway as a joint venture with UiT—The Arctic University of Norway. Small (0.1–6–14 m3) reactors were used for initial experiments and to produce inoculum cultures while upscaling experiments took place in a 300 m3 reactor. We here argue that species cultivated in reactors should be large since biovolume specific self-shadowing of light can be lower for large vs. small cells. The highest production, 1.28 cm3 L−1 biovolume (0.09–0.31 g DW day−1), was obtained with continuous culture at ca. 19% light utilization efficiency and 34% CO2 uptake. We cultivated 4–6 months without microbial contamination or biofouling, and this we argue was due to a natural antifouling (anti-biofilm) agent in the algae. In terms of protein quality all essential amino acids were present, and the composition and digestibility of the fatty acids were as required for feed ingredients. Lipid content was ca. 20% of ash-free DW with high EPA levels, and omega-3 and amino acid content increased when factory fume was added. The content of heavy metals in algae cultivated with fume was well within the accepted safety limits. Organic pollutants (e.g., dioxins and PCBs) were below the limits required by the European Union food safety regulations, and bioprospecting revealed several promising findings.

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Section: Discussionmentioning

confidence: 99%

Mass Cultivation of Microalgae: I. Experiences with Vertical Column Airlift Photobioreactors, Diatoms and CO2 Sequestration

et al. 2022

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“…Nitrogen mono-oxide and sulfur dioxide can be removed by simultaneous absorption into aqueous mixed solutions of sulfi te and [Fe II (edta)]H2O)]2−, ferrous ion coordinated to an anion of ethylene-diaminetetraacetic acid, (Tomasz et al 2016). A sequential process for the recovery and purifi cation of multiple products was used on a mixture of algal biomass comprised of Spirulina platensis and Dunaliella salina (Kethineni 2017).…”

Section: Article Informationmentioning

confidence: 99%

Studies on NOx removal using Dunaliella salina algae in photobioreactors

Chandrika¹,

Choragudi²,

Kakarla³

et al. 2018

Biosci. Biotech. Res. Comm

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The capability of an algal species to remove NO2 and NO in the simulated fl ue gas was established using Dunaliella salina in Photobioreactors under two variants of NOx sources. The concentrations studies were in the range between 25ppm to 150ppm. The diffusion of NOx and subsequent reaction with water resulted in NO3-and NO2-in the growth medium. Algal growth by absorption of NO3-and NO2-created a nitrate gradient in the bulk medium resulting in NOx uptake rates from the gas phase of up to 96%, leaving the unconsumed nitrogen of up to 7 mg-N/L in the growth medium. Algal species having an initial cell density of 2.8x105 cells/mL grew to the cell density of 1.73x107 cells/mL

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Development of Sequential Processes for Multiple Product Recovery from Microalgae

Cited by 2 publications

References 29 publications

Mass Cultivation of Microalgae: I. Experiences with Vertical Column Airlift Photobioreactors, Diatoms and CO2 Sequestration

Mass Cultivation of Microalgae: I. Experiences with Vertical Column Airlift Photobioreactors, Diatoms and CO2 Sequestration

Studies on NOx removal using Dunaliella salina algae in photobioreactors

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