Microalgae from Biorefinery as Potential Protein Source for Siberian Sturgeon ( A. baerii ) Aquafeed

Tiziana Bongiorno, Luciano Foglio, Lorenzo Proietti, Mauro Vasconi, Annalaura Lopez, Andrea Pizzera, Domenico Carminati, Aldo Tava, Antonio Jesús Vizcaíno, Francisco Javier Alarcón, Elena Ficara and Katia Parati
Additional contact information
Tiziana Bongiorno: Istituto Sperimentale Italiano L. Spallanzani—Loc. La Quercia, 26027 Rivolta d’Adda (CR), Italy
Luciano Foglio: Istituto Sperimentale Italiano L. Spallanzani—Loc. La Quercia, 26027 Rivolta d’Adda (CR), Italy
Lorenzo Proietti: Istituto Sperimentale Italiano L. Spallanzani—Loc. La Quercia, 26027 Rivolta d’Adda (CR), Italy
Mauro Vasconi: Department of Veterinary Medicine, University of Milan, 26900 Lodi, Italy
Annalaura Lopez: Department of Veterinary Medicine, University of Milan, 26900 Lodi, Italy
Andrea Pizzera: Department of Civil and Environmental Engineering, Polytechnic University of Milan, 20133 Milano, Italy
Domenico Carminati: Council for Agricultural Research and Economics, Research Centre for Animal Production and Aquaculture (CREA-ZA), 26900 Lodi, Italy
Aldo Tava: Council for Agricultural Research and Economics, Research Centre for Animal Production and Aquaculture (CREA-ZA), 26900 Lodi, Italy
Antonio Jesús Vizcaíno: Department of Biology and Geology, Ceimar-University of Almería, 04120 Almería, Spain
Francisco Javier Alarcón: Department of Biology and Geology, Ceimar-University of Almería, 04120 Almería, Spain
Elena Ficara: Department of Civil and Environmental Engineering, Polytechnic University of Milan, 20133 Milano, Italy
Katia Parati: Istituto Sperimentale Italiano L. Spallanzani—Loc. La Quercia, 26027 Rivolta d’Adda (CR), Italy

Sustainability, 2020, vol. 12, issue 21, 1-18

Abstract: The demand for aquafeed is expected to increase in the coming years and new ingredients will be needed to compensate for the low fish meal and oil availability. Microalgae represent a promising matrix for the future aquafeed formulation, however, the high production cost hinders its application. The use of microalgae from biorefinery would reduce the disposal costs for microalgae production. The present study aimed to (i) verify the growth of microalgae on digestate coming from pig farming and (ii) evaluate their potential valorization as dietary ingredient in aquafeed according to a Circular Bioeconomy approach. For these purposes, a microalgae biomass was produced on an outdoor raceway reactor supplied with digestate and used for partial replacement (10% of the diet) in aquafeed for Siberian sturgeon fingerlings ( Acipenser baerii ). The results obtained confirm the feasibility for growing microalgae on digestate with satisfactory productivity (6.2 gDM m −2 d −1 ), nutrient removal efficiency and Chemical Oxygen Demand reduction; moreover, the feeding trial carried out showed similar results between experimental and control groups ( p > 0.05), in term of growth performance, somatic indices, fillet nutritional composition and intestinal functionality, to indicate that microalgae from biorefinery could be used as protein source in Siberian sturgeon aquafeed.

Keywords: sturgeon; aquafeed; biorefinery; digestate; microalgae (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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