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Sustainable Production of Monoraphidium Microalgae Biomass as a Source of Bioenergy.

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Title: Sustainable Production of Monoraphidium Microalgae Biomass as a Source of Bioenergy.
Authors: Hawrot-Paw, Małgorzata1 (AUTHOR) adam.koniuszy@zut.edu.pl, Koniuszy, Adam1 (AUTHOR), Gałczyńska, Małgorzata2 (AUTHOR) malgorzata.galczynska@zut.edu.pl
Source: Energies (19961073). Nov2020, Vol. 13 Issue 22, p5975. 1p.
Subject Terms: *Biomass, *Microalgae, *Salmon farming, *Biomass production, *Opacity (Optics), *Cell culture
Abstract: Microalgae are a renewable source of unconventional biomass with potential application in the production of various biofuels. The production of carbon-neutral fuels is necessary for protecting the environment. This work determined the possibility of producing biomass of microalgae belonging to Monoraphidium genus using saline wastewater resulting from proecological salmon farming in the recirculating aquaculture system. The tests were carried out in tubular photobioreactors using LED light. As a part of the analyses, the growth and productivity of microalgal biomass, cell density in culture, and lipid concentration and ash content in biomass were determined. In addition, the concentration of selected phosphorus and nitrogen forms present in wastewater corresponding to the degree of their use by microalgae as a nutrient substrate was determined. The biomass concentration estimated in the tests was 3.79 g·L−1, while the maximum biomass productivity was 0.46 g·L−1·d−1. The cells' optical density in culture measured at 680 nm was 0.648. The lipid content in biomass was 18.53% (dry basis), and the ash content was 32.34%. It was found that microalgae of the genus Monoraphidium effectively used the nitrogen as well as phosphorus forms present in the wastewater for their growth. The total nitrogen content in the sewage decreased by 82.62%, and total phosphorus content by over 99%. The analysis of the individual forms of nitrogen showed that N-NO3 was reduced by 85.37% and N-NO2 by 78.43%, while orthophosphate (V) dissolved in water was reduced by 99%. However, the content of N-NH4 in wastewater from the beginning till the end of the experiment remained <0.05 mg·L−1. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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DbLabel: Energy & Power Source
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Sustainable Production of Monoraphidium Microalgae Biomass as a Source of Bioenergy.
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  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Energies+%2819961073%29%22&quot;&gt;Energies (19961073)&lt;/searchLink&gt;. Nov2020, Vol. 13 Issue 22, p5975. 1p.
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  Data: *&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Biomass%22&quot;&gt;Biomass&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Microalgae%22&quot;&gt;Microalgae&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Salmon+farming%22&quot;&gt;Salmon farming&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Biomass+production%22&quot;&gt;Biomass production&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Opacity+%28Optics%29%22&quot;&gt;Opacity (Optics)&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Cell+culture%22&quot;&gt;Cell culture&lt;/searchLink&gt;
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Microalgae are a renewable source of unconventional biomass with potential application in the production of various biofuels. The production of carbon-neutral fuels is necessary for protecting the environment. This work determined the possibility of producing biomass of microalgae belonging to Monoraphidium genus using saline wastewater resulting from proecological salmon farming in the recirculating aquaculture system. The tests were carried out in tubular photobioreactors using LED light. As a part of the analyses, the growth and productivity of microalgal biomass, cell density in culture, and lipid concentration and ash content in biomass were determined. In addition, the concentration of selected phosphorus and nitrogen forms present in wastewater corresponding to the degree of their use by microalgae as a nutrient substrate was determined. The biomass concentration estimated in the tests was 3.79 g&#183;L−1, while the maximum biomass productivity was 0.46 g&#183;L−1&#183;d−1. The cells&#39; optical density in culture measured at 680 nm was 0.648. The lipid content in biomass was 18.53% (dry basis), and the ash content was 32.34%. It was found that microalgae of the genus Monoraphidium effectively used the nitrogen as well as phosphorus forms present in the wastewater for their growth. The total nitrogen content in the sewage decreased by 82.62%, and total phosphorus content by over 99%. The analysis of the individual forms of nitrogen showed that N-NO3 was reduced by 85.37% and N-NO2 by 78.43%, while orthophosphate (V) dissolved in water was reduced by 99%. However, the content of N-NH4 in wastewater from the beginning till the end of the experiment remained &lt;0.05 mg&#183;L−1. [ABSTRACT FROM AUTHOR]
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        Value: 10.3390/en13225975
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        Text: English
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      – SubjectFull: Biomass
        Type: general
      – SubjectFull: Microalgae
        Type: general
      – SubjectFull: Salmon farming
        Type: general
      – SubjectFull: Biomass production
        Type: general
      – SubjectFull: Opacity (Optics)
        Type: general
      – SubjectFull: Cell culture
        Type: general
    Titles:
      – TitleFull: Sustainable Production of Monoraphidium Microalgae Biomass as a Source of Bioenergy.
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            NameFull: Hawrot-Paw, Małgorzata
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            NameFull: Koniuszy, Adam
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            NameFull: Gałczyńska, Małgorzata
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            – D: 15
              M: 11
              Text: Nov2020
              Type: published
              Y: 2020
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              Value: 13
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            – TitleFull: Energies (19961073)
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