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

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Tossavainen , M , Lahti , K , Edelmann , M , Eskola , R , Lampi , A-M , Piironen , V , Korvonen , P , Ojala , A & Romantschuk , M 2019 , ' Integrated utilization of microalgae cultured in aquaculture wastewater : wastewater treatment and production of valuable fatty acids and tocopherols ' , Journal of Applied Phycology , vol. 31 , no. 3 , pp. 1753-1763 . https://doi.org/10.1007/s10811-018-1689-6

Title: Integrated utilization of microalgae cultured in aquaculture wastewater : wastewater treatment and production of valuable fatty acids and tocopherols
Author: Tossavainen, Marika; Lahti, Katariina; Edelmann, Minnamari; Eskola, Reetta; Lampi, Anna-Maija; Piironen, Vieno; Korvonen, Pasi; Ojala, Anne; Romantschuk, Martin
Contributor: University of Helsinki, Helsinki Institute of Sustainability Science (HELSUS)
University of Helsinki, Ecosystems and Environment Research Programme
University of Helsinki, Food quality and safety: lipids, vitamins and other bioactive compounds
University of Helsinki, Department of Food and Nutrition
University of Helsinki, Department of Food and Nutrition
University of Helsinki, Ecosystems and Environment Research Programme
University of Helsinki, Helsinki Institute of Sustainability Science (HELSUS)
Date: 2019-06
Language: eng
Number of pages: 11
Belongs to series: Journal of Applied Phycology
ISSN: 0921-8971
URI: http://hdl.handle.net/10138/302837
Abstract: 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 (1.5gL(-1)), lipid (84.9mgL(-1)), and tocopherol (877.2gL(-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.
Subject: Euglena gracilis
Selenastrum
PUFA
RAS
Wastewater
Feed
NANNOCHLOROPSIS-OCULATA EUSTIGMATOPHYCEAE
SALMON SALMO-SALAR
VITAMIN-E
MARINE MICROALGAE
EUGLENA-GRACILIS
ALGAL BIOMASS
CHLORELLA SP
FRESH-WATER
GROWTH
BIOFUEL
1172 Environmental sciences
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