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Article

Anaerobic Mineralization of Recirculating Aquaculture Drum Screen Effluent for Use as a Naturally-Derived Nutrient Solution in Hydroponic Cropping Systems

1
Department of Agriculture, Nutrition, and Food Systems, University of New Hampshire, Durham, NH 03824, USA
2
Environmental Science Program, Harrisburg University of Science and Technology, Harrisburg, PA 17101, USA
3
Integrative Sciences Program, Harrisburg University of Science and Technology, Harrisburg, PA 17101, USA
4
Natural Resources Conservation Services, United States Department of Agriculture, Epping, NH 03042, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Antoni Margalida
Received: 22 May 2021 / Revised: 12 June 2021 / Accepted: 16 June 2021 / Published: 1 July 2021
Operation and effluent treatment costs are limiting factors for the success of recirculating aquaculture systems (RAS) in meeting seafood demand in the United States. Adopting a capture-and-reuse waste management model similar to terrestrial agriculture farmers would allow RAS farmers to monetize effluent and offset production costs. The moisture content and nutrient profile of RAS effluent makes it a potential option for use as a hydroponic fertilizer. Treatment of RAS waste is needed to mineralize particulate-bound nutrients before becoming a viable hydroponic nutrient solution. Anaerobic treatment (AT), a method used by municipal and agricultural waste treatment facilities to reduce total solids, has been shown to successfully mineralize particulate-bound nutrients from RAS effluent. Continuously mixed anaerobic batch bioreactors were used to evaluate the degree to which AT may mineralize particulate-bound nutrients in solid RAS waste. Concentrations of twelve different macro- and micro-nutrients were analyzed in the waste before and after treatment. Effluent samples were analyzed to determine the fraction of each nutrient in the solid and aqueous forms. This study showed that AT is an effective method to mineralize particulate-bound nutrients in RAS effluent and the mineralization rate data may be used to design a pilot-scaled flow-through RAS effluent treatment system. View Full-Text
Keywords: nutrient resource management; aquaculture; anaerobic treatment; aquaponics; circular nutrient economy; hydroponics nutrient resource management; aquaculture; anaerobic treatment; aquaponics; circular nutrient economy; hydroponics
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MDPI and ACS Style

Tetreault, J.; Fogle, R.; Guerdat, T. Anaerobic Mineralization of Recirculating Aquaculture Drum Screen Effluent for Use as a Naturally-Derived Nutrient Solution in Hydroponic Cropping Systems. Conservation 2021, 1, 151-167. https://0-doi-org.brum.beds.ac.uk/10.3390/conservation1030013

AMA Style

Tetreault J, Fogle R, Guerdat T. Anaerobic Mineralization of Recirculating Aquaculture Drum Screen Effluent for Use as a Naturally-Derived Nutrient Solution in Hydroponic Cropping Systems. Conservation. 2021; 1(3):151-167. https://0-doi-org.brum.beds.ac.uk/10.3390/conservation1030013

Chicago/Turabian Style

Tetreault, Joseph, Rachel Fogle, and Todd Guerdat. 2021. "Anaerobic Mineralization of Recirculating Aquaculture Drum Screen Effluent for Use as a Naturally-Derived Nutrient Solution in Hydroponic Cropping Systems" Conservation 1, no. 3: 151-167. https://0-doi-org.brum.beds.ac.uk/10.3390/conservation1030013

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