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    <journal-meta>
      <journal-title-group><journal-title>SET Proceedings</journal-title></journal-title-group>
      <issn pub-type="epub">2978-4387</issn>
      <publisher><publisher-name>Caravel Press</publisher-name></publisher>
    </journal-meta>
    <article-meta>
      <article-id pub-id-type="doi">10.65582/set.2022.146</article-id>
      <article-id pub-id-type="publisher-id">2022.146</article-id>
      <title-group><article-title>Comparative evaluation of microalgae cultivation systems for biofuel application</article-title></title-group>
    <contrib-group>
      <contrib contrib-type="author">
        <name><surname>Rana</surname><given-names>Mohit Singh</given-names></name>
        <xref ref-type="aff" rid="aff1"/>
        <email>mohit_r@ah.iitr.ac.in</email>
      </contrib>
      <contrib contrib-type="author">
        <name><surname>Prajapati</surname><given-names>Sanjeev Kumar</given-names></name>
        <xref ref-type="aff" rid="aff1"/>
        <email>sanjukec@hre.iitr.ac.in</email>
      </contrib>
      <aff id="aff1">Environment and Biofuel Research Laboratory, Hydro and Renewable Energy Department, Indian Institute of Technology Roorkee, Uttarakhand, 247667, India</aff>
    </contrib-group>
      <pub-date publication-format="electronic" date-type="pub"><day>13</day><month>07</month><year>2023</year></pub-date>
      <volume>19</volume>
      <issue>4</issue>
      <isbn publication-format="electronic">978-0-85358-351-6</isbn>
      <fpage>121</fpage>
      <lpage>127</lpage>
      <self-uri xlink:href="https://caravelpress.com/proceedings/set/papers/2022.146"/>
      <history>
        <date date-type="received"><string-date>13 July 2023</string-date></date>
      </history>
      <permissions>
        <copyright-statement>© 2022 Copyright WSSET</copyright-statement>
        <copyright-year>2023</copyright-year>
      </permissions>
      <abstract><p>Microalgae have been envisioned as a key resource for use as a transportation biofuel. However, microalgae cultivation on a mass scale is associated with several challenges, including production cost and desired quality. In the quest for high-density microalgae cultivation having desired traits applicable to biofuel quality, the present work aimed to evaluate microalgae cultivation systems systematically. Column photobioreactor (PBR) and microalgal-biofilm reactor (MBR) were selected for microalgae cultivation as a suspended culture and as a biofilm, respectively. Microalgae Chlorella pyrenoidosa was grown under mixotrophic mode in laboratory-controlled conditions at an illumination of 15,000-20,000 Lux, a temperature of 25±2°C, and a light/dark cycle of 16/8 hours. The selected microalgae was cultivated in domestic wastewater supplemented with glycerol. The cultivation systems were evaluated in terms of biomass growth, biochemical composition, and quality of biofuels. As a result, MBR was observed to achieve the maximum biomass productivity of 10 g m-2 d-1. In contrast, in PBR, biomass productivity of 3 g m-2 d-1 was attained. The MBR-grown biomass had a higher carbohydrate fraction than PBR-grown biomass. On the other hand, the lipid content for PBR grown biomass was slightly higher than the MBR-grown biomass. Further, the biodiesel based on PBR-grown biomass showed quality in agreement with international standards (ASTM D6751-02, EN14214). In contrast, the case was not the same for microalgae cultivated in MBR. The results showed microalgae cultivation as a suspended culture in PBR was appropriate for biodiesel production. Similarly, the MBR-grown biomass can be directed for biogas or bioethanol production. Therefore, during the selection and scale-up of the microalgae cultivation system, a thorough investigation of biofuel quality along with biomass productivity and biochemical composition is suggested.</p></abstract>
      <kwd-group kwd-group-type="author">
        <kwd>microalgae</kwd>
        <kwd>biofuel</kwd>
        <kwd>photobioreactor</kwd>
        <kwd>biofilm</kwd>
        <kwd>renewable energy</kwd>
      </kwd-group>
      <conference>
        <conf-date>16 to 18 August 2022</conf-date>
        <conf-name>19th International Conference on Sustainable Energy Technologies</conf-name>
        <conf-acronym>SET2022</conf-acronym>
        <conf-num>19</conf-num>
        <conf-loc>Istanbul, Turkiye</conf-loc>
      </conference>
    </article-meta>
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