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    Production, feeding and storage of diatom Chaetoceros calcitrans paste by electrolytic flocculation with reduced Pb content

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    Date
    2021-03-02
    Author
    Villa-Franco, Annie ORCID
    de la Peña, Milagros R. ORCID
    Igcasan Jr., Hermoso P.
    Gamuza, Glecilda B.
    Teves, Christine Marie L.
    Balinas, Vicente T.
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    Abstract
    An innovative microalgae harvesting technique was carried out under various anode/cathode (2/2, 4/4 and 6/6) configuration and at different voltage treatment (3, 6 and 10 V) to efficiently electroflocculate Chaetoceros calcitrans. This study was conducted to determine the optimal configuration of electrode units (Pb and Al) and voltage settings that could improve the quality of harvested paste in terms of nutritional value and metal contamination for its later use in aquaculture. The use of 6/6 electrodes achieved the shortest harvest time of 48 ± 1 min and the lowest Pb content (83.7 ± 0.3 ppm). In terms of voltage treatment, harvest time was inversely proportional to the voltage used. However, Pb content was significantly lowest in the paste produced using 3 V (41.78 ± 0.12 ppm), when compared to those harvested under 6 V (304.35 ± 0.79 ppm) and 10 V (343.90 ± 0.91 ppm) treatment. Likewise, Pb residues in the resulting effluent are also lowest (0.245 ± 0 ppm) with 3 V treatments. C. calcitrans paste can be resuspended ≤6 months but with a lag phase of 3–4 days for use as starter culture. A 97% reduction in Pb content of C. calcitrans paste and 77% reduction in Pb content were obtained in Artemia (7.8%) fed C. calcitrans paste.
    URI
    http://hdl.handle.net/10862/6041
    Suggested Citation
    Villa‐Franco, A. U., de la Peña, M. R., Igcasan, H. P., Gamuza, G. B., Teves, C. M. L., & Balinas, V. T. (2021). Production, feeding and storage of diatom Chaetoceros calcitrans paste by electrolytic flocculation with reduced Pb content. Aquaculture Research, are.15161.
    DOI
    10.1111/are.15161
    Type
    Article
    ISSN
    1355-557X; 1365-2109
    Subject
    Feeding; Diatoms; Flocculation; Algal culture; Harvesting; Biochemical analysis; Anodes; Cathodes; Biochemical composition; Artemia; Chaetoceros calcitrans; Electroflocculation; Microalgal paste; Microalgae harvesting; Pb content; Production; Fabrication; Artemia salina
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    • Journal Articles [1115]


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