Cold-adapted culturing of the microalga Monoraphidium sp. in thin-layer raceway pond for biomass production

Lakatos, Gergely Ernő and Ranglová, Karolína and Bárcenas-Pérez, Daniela and Grivalský, Tomáš and Manoel, João Câmara and Mylenko, Mykola and Cheel, José and Nyári, József and Wirth, Roland and Kovács, Kornél Lajos and Kopecký, Jiří and Nedbalová, Linda and Masojídek, Jiří (2023) Cold-adapted culturing of the microalga Monoraphidium sp. in thin-layer raceway pond for biomass production. ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS, 69. No-102926. ISSN 2211-9264

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Abstract

Three cultivation regimes were tested in cold-adapted cultures of the green microalga Monoraphidium in an outdoor thin-layer raceway pond: cultivation under sunlight; its combination with continuous supplementary illumination; and nitrogen depletion using both light sources. The highest volumetric and areal productivity, 0.16 g L−1 d−1 and 3.22 g m−2 d−1, respectively corresponding to the specific growth rate μ of 0.191 d−1 were achieved when sunlight was combined with supplementary illumination. The maximum total fatty acid content, 20.29 % of DW, rich in oleic acid, 54 % of total fatty acid content, was achieved under nitrogen depletion stress. An outstanding amount of lutein, 26.39 mg lutein g−1 DW, was detected grown under sunlight in the first trial. From the harvested and fermented biomass in the second trial 236 mLN g−1oTS of methane was generated.

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