Integrated utilization of microalgae cultured in aquaculture wastewater: wastewater treatment and production of valuable fatty acids and tocopherols

By Marika Tossavainen, K. Lahti, M. Edelmann, Reetta Eskola, A. Lampi, V. Piironen, Pasi Korvonen, A. Ojala, M. Romantschuk. Journal of Applied Phycology, 2018

87 citations recorded by the source corpus.

Microalgal cultivation in aquaculture wastewater (AWW) from recirculating aquaculture systems (RAS) is an approach for combined production of valuable algal biomass and AWW treatment. The growth, nutrient uptake, fatty acid (FA) profile, and tocopherol content of mixed algal cultures of Euglena gracilis with Selenastrum grown in AWWs from pikeperch (Sander lucioperca) and catfish (Clarias anguillaris) RAS were studied. The highest algal biomass (1.5 g L−1), lipid (84.9 mg L−1), and tocopherol (877.2 μg L−1) yields were achieved in sludge-amended pike perch AWW. Nutrient removal rates in experiments were 98.9–99.5 and 98.4–99.8% for NH4-N and PO4-P, and 75.4–89.2% and 84.3–95.7% for TN and TP, respectively, whereas the COD was reduced by 45.8–67.6%. Biomass EPA and DHA content met, while ARA and tocopherol content exceeded the requirements for fish feed. Algal cultivation in AWWs is a promising alternative for AWW treatment while providing a replacement for fish oil in feed.

Subfields: Aquatic Science, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/f55bfbf8698e5b2920acae174b05de940101b88a

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Citations in the corpus

• Sustainable Intensification of Aquaculture through Nutrient Recycling and Circular Economies: More Fish, Less Waste, Blue Growth (2021, methodology): “…microalgae and seaweed (Castine, McKinnon, et al. 2013; Pires et al. 2013; Sahu et al. 2013; Khademi et al. 2014; Han et al. 2019; Lu et al. 2019; Cabanelas et al. 2013; Pires et al. 2013; Sahu et al. 2013; Gao et al. 2016; Khatoon et al. 2016; Ansari et al. 2017; Tossavainen et al. 2019).”
• Production of Microalgal Biomass Using Aquaculture Wastewater as Growth Medium (2019, background): “[36], the largest content of mixed biomass of Euglena gracilis and Selenastrum (1.”