Nitrogen and carbon balance in a novel near-zero water exchange saline recirculating aquaculture system

Yogev, Uri; Sowers, Kevin R.; Mozes, Noam; Gross, Amit

doi:10.1016/j.aquaculture.2016.04.029

Cited by 73 publications

(34 citation statements)

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“…A recent quantitative description of a near-zero exchange Recirculating Aquaculture System (RAS) with energy recovery composing a fish tank, a solid filter, nitrification, denitrification and upflow anaerobic sludge blanket (UASB) reactor [27], was used as the skeleton for the design of the suggested aquaponic system (Figure 2). Scheme of three treatment loops recirculating aquatic system (RAS) including biofilter (nitrification), nitrogen removal unit (denitrification), and anaerobic digester for biogas production (After [27]).…”

Section: Methodsmentioning

confidence: 99%

“…Since the fate of fish feed in RAS has been well quantified [27,30,45,54,55], the fate of nutrients, solids, and carbonaceous wastes resulting from feed application in RAS can be predicted [56]. Similarly, the water balance is also quantifiable, so the potential availability of all components in the water and the solid phases can be derived [56].…”

Section: Theory and Rationalmentioning

confidence: 99%

“…Scheme of three treatment loops recirculating aquatic system (RAS) including biofilter (nitrification), nitrogen removal unit (denitrification), and anaerobic digester for biogas production (After [27]). …”

Section: Figurementioning

confidence: 99%

“…This highlights the issue of "organic matter separation" in aquaponic systems, which requires continuous removal and treatment (or it might otherwise pollute or increase costs). To date solid fish When examining the fate of nutrients and carbon supplied from fish feed in aquaculture systems, it appears that about 25% is assimilated as fish biomass [26][27][28]. Roughly 35% is excreted by the fish as total ammonia nitrogen (TAN) [29], which is then oxidized in the aerobic bio-filter and potentially available to plants, and the remaining 40% is discharged as "sludge" from the system [27,30].…”

mentioning

confidence: 99%

“…To date solid fish When examining the fate of nutrients and carbon supplied from fish feed in aquaculture systems, it appears that about 25% is assimilated as fish biomass [26][27][28]. Roughly 35% is excreted by the fish as total ammonia nitrogen (TAN) [29], which is then oxidized in the aerobic bio-filter and potentially available to plants, and the remaining 40% is discharged as "sludge" from the system [27,30]. This highlights the issue of "organic matter separation" in aquaponic systems, which requires continuous removal and treatment (or it might otherwise pollute or increase costs).…”

mentioning

confidence: 99%

See 4 more Smart Citations

Nutrients and Energy Balance Analysis for a Conceptual Model of a Three Loops off Grid, Aquaponics

Yogev

Barnes

Gross

2016

Water

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Food security, specifically in water scarce regions, is an increasing local and global challenge. Finding new ways to increase agricultural production in a sustainable manner is required. The current study suggests a conceptual model to integrate established recirculating aquaculture practices into a near-zero discharge aquaponic system that efficiently utilizes water, excreted nutrients and organic matter for energy. The suggested model allows to significantly extend the planted area and recover energy in the form of biogas to operate the system off-grid. A mass balance model of nitrogen, carbon and energy was established and solved, based on data from the literature. Results demonstrate that a fish standing stock of about 700 kg would produce 3.4 tons of fish annually and enough nutrients to grow about 35 tons of tomatoes per year (chosen as a model plant) and recover sufficient energy (70 kWh/day) to run the system on biogas and use less water. If proven successful, this approach may play a major role in sustainably enhancing food security in rural and water scarce regions.

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Section: Methodsmentioning

confidence: 99%

Section: Theory and Rationalmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Nutrients and Energy Balance Analysis for a Conceptual Model of a Three Loops off Grid, Aquaponics

Yogev

Barnes

Gross

2016

Water

Self Cite

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Aquaculture Wastewater Treatment Through Microalgae for Biomass Production and its Use in Agriculture, Feed, and Energy Applications

Shaika,

Khan,

Sultana

et al. 2024

Algae Mediated Bioremediation

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Biofloc technology as part of a sustainable aquaculture system: A review on the status and innovations for its expansion

McCusker

Bolton‐Warberg

Davies

et al. 2023

Aquaculture Fish & Fisheries

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Increased food demand, reflecting a rising global human population, attaining 8 billion in 2022, has furthered the intensification of farmed aquatic animal production. Intensification practices can be resource demanding for micro and macronutrients, dedicated feeds, fossil fuels, chemotherapeutics, and water. Water replaces evaporative losses and may be used to dilute nutrient‐rich wastewater. As an alternative to wastewater discharge, biofloc technology (BFT) uses microbes to manage nutrient levels in production systems. A microbial community grown at high densities can assimilate waste metabolites for growth. This is promoted by increasing the carbon–nitrogen (C:N) ratio using a combination of aquafeed fed to the fish and an additional carbohydrate source, for example, starch, molasses, or bran. The microbial biomass offers a continuous and additional food source to the farmed animal, thus reducing the need for finished aquafeeds and lowering the feed conversion ratio. Although the approach relies on multiple interacting species, BFT can be deployed in relatively low technology settings. This review considers the basis of BFT and identifies areas for innovation and expansion. For example, control of light quantity and quality can influence the biofloc and hence the growth of cultured species. Research on biofloc aquaculture is dominated by studies using tilapia and shrimp, but the technology could be applied to other species, particularly species that are tolerant of biofloc conditions and not highly carnivorous. Biofloc may be a useful biosecurity tool for all or part of the life cycle, and meals made from dried biofloc may enhance the production of cultured species. The key benefits of BFT can potentially be seen in reduced water consumption, lower feed requirements, and improved fish health. This review differs from current review papers in proposing the use of a life cycle assessment in conjunction with BFT, which may be a useful tool for describing and communicating the relative benefits of biofloc systems and their wider environmental impact. This study will serve as a useful knowledge base of BFT information for students, researchers, and stakeholders alike, offering a central source of the main aspects around the culturing of biofloc, key parameters, common species used, areas of potential improvement, and a discussion on where the future of BFT may lie.

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Nitrogen and carbon balance in a novel near-zero water exchange saline recirculating aquaculture system

Cited by 73 publications

References 50 publications

Nutrients and Energy Balance Analysis for a Conceptual Model of a Three Loops off Grid, Aquaponics

Nutrients and Energy Balance Analysis for a Conceptual Model of a Three Loops off Grid, Aquaponics

Aquaculture Wastewater Treatment Through Microalgae for Biomass Production and its Use in Agriculture, Feed, and Energy Applications

Biofloc technology as part of a sustainable aquaculture system: A review on the status and innovations for its expansion

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