期刊
SCIENTIFIC REPORTS
卷 12, 期 1, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41598-021-04516-w
关键词
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资金
- ERC-OA-2013-PoC-European Research Council ERC Proof of Concept under the program FP7-IDEAS-ERC [630671]
- Enterprise Ireland Commercialization Fund Program
- European Regional Development Fund (ERDF)
- Ireland's European Structural and Investment Funds Programs 2014-2020 [CF20160426]
- Industrial Organica S.A. (IOSA, Monterrey, Mexico)
- Nutralgae Ltd (Waterford, Ireland)
- European Research Council (ERC) [630671] Funding Source: European Research Council (ERC)
Aquaculture is seeking substitutes for fishmeal and fish oil, and the development of a closed-loop bioreactor that produces nutritious zooplankton could be a solution to standardize mass production for the aquafeed industry.
Aquaculture is looking for substitutes for fishmeal and fish oil to maintain its continued growth. Zooplankton is the most nutritious option, but its controlled mass production has not yet been achieved. In this context, we have developed a monoalgal 'green water' closed-loop bioreactor with the microalgae Tetraselmis chui that continuously produced the harpacticoid copepod Tigriopus californicus. During 145 days of operation, the 2.2 m(3) bioreactor produced 3.9 kg (wet weight) of Tigriopus with (dry weight) 0.79 +/- 0.29% eicosapentaenoic acid (EPA), 0.82 +/- 0.26% docosahexaenoic acid (DHA), 1.89 +/- 0,60% 3S,3'S-astaxanthin and an essential amino acid index (EAAI) of 97% for juvenile Atlantic salmon. The reactor kept the pH stable over the operation time (pH 8.81 +/- 0.40 in the algae phase and pH 8.22 +/- 2.96 in the zooplankton phase), while constantly removed nitrate (322.6 mg L-1) and phosphate (20.4 mg L-1) from the water. As a result of the stable pH and nutrient removal, the bioreactor achieved zero effluent discharges. The upscaling of monoalgal, closed-loop 'green water' bioreactors could help standardize zooplankton mass production to supply the aquafeeds industry.
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