Effluent from a biofloc technology (BFT) tilapia culture on the aquaponics production of different lettuce varieties

Pinho, Sara M.; Molinari, Diego; Mello, Giovanni Lemos de; Fitzsimmons, K.; Emerenciano, Maurício Gustavo Coelho

doi:10.1016/j.ecoleng.2017.03.009

Cited by 86 publications

(60 citation statements)

References 27 publications

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“…The technique based on bioflocs technology (BFT) is characterized as super-intensive; it is being based microbial community comprised by aggregates of bacteria, microalgae, protozoan and other invertebrates that boost natural productivity, water quality and nutrient cycling (Pinho et al, 2017). Bioflocs assimilate ammonia nitrogen, offering a rich natural feed for planktonic organisms (Avnimelech, 1999;Schneider et al, 2006;Ekasari et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Zootechnical Performance Evaluation of the Use of Biofloc Technology in Nile Tilapia Fingerling Production at Different Densities

et al. 2019

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The effect of producing and culturing Nile tilapia (Oreochromis niloticus) fingerlings in biofloc technology (BFT)-based systems was investigated in terms of zootechnical performance, aiming to define the best culturing density for 64 days. A completely randomized design was used, with four replications totaling 24 experimental units. The weight gain of each batch of animals per experimental unit (E.U.) was evaluated at densities of 200, 400, 600, 800, and 1,000 fingerlings m-3. For controls, a Water Recirculation System with 248 fingerlings m-3 was used. The fingerlings were fed commercial feed containing 35% protein and brown sugar as a carbohydrate source at a C:N ratio of 20:1. Dissolved oxygen, total ammonia nitrogen, pH, and temperature were monitored daily, and nitrite and alkalinity were monitored weekly. The analysis of weight gain data obtained a linear function y =-0.0017X 2 + 3.724X-87.77, with r 2 = 0.864, coefficient of variation = 14.23%, and correlation coefficient = 0.91. At the end of the cultivation period the system's planktonic community presented high diversity, dominated by rotifers and diatoms. The data of survival, density management demand, and physicochemical parameters variations of the water suggested an optimal density of 800 fish m-3 , since this resulted in an average weight gain per E.U. of 1,891.25 ± 151.24 g, with a productive efficiency index of 274.96 that is approximately three times that of the control treatment (87.43). Biofloc technology can be employed in two-phase super-intensive Nile tilapia culture systems, with a stocking density in the rearing stage of 800 fish m-3 .

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Section: Introductionmentioning

confidence: 99%

Zootechnical Performance Evaluation of the Use of Biofloc Technology in Nile Tilapia Fingerling Production at Different Densities

et al. 2019

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“…pH levels in this study were higher than 5.5 and 6.5 but slightly above the recommended level (7.0) for recirculating aquaponic water. Thus, the pH levels may have probably influenced the nutrient availability and plant biomass because plant production reduces at relatively high pH levels [44]. Potassium hydroxide or calcium hydroxide can be added in the aquaponic systems to stabilize pH [23].…”

Section: Discussionmentioning

confidence: 99%

Growth and Nutrient Removal Efficiency of Sweet Wormwood (Artemisia annua) in a Recirculating Aquaculture System for Nile Tilapia (Oreochromis niloticus)

Gichana

Meulenbroek

Ogello

et al. 2019

Water

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The maintenance of optimal water quality for fish production is one of the major challenges in aquaculture. Aquaponic systems can improve the quality of water for fish by removing the undesirable wastes and in turn produce a second marketable crop. However, there is no information on the growth and nutrient removal capability of Artemisia annua in aquaponic systems. This study evaluated the effect of plant density on water quality, the growth of A. annua and Oreochromis niloticus in a small scale aquaponic system in Kenya. The aquaponic system consisted of three treatments representing different plant densities (D1: 48 plants/m2, D2: 24 plants/m2 and D3:0 plants/m2). The high plant density system contributed significantly (p < 0.05) to the removal of all nutrients. The removal efficiency of ammonia was significantly higher in D1 (64.1 ± 14.7%) than in D2 (44.5 ± 6.8%) and D3 (38.0 ± 12.1%). Nitrates and nitrites were inconsistent, whereas phosphorus increased gradually in all treatments. The productivity of plants was higher in D1 than D2. Fish growth rates were significantly higher in D1 (0.35 ± 0.03 g/d) and D2 (0.32 ± 0.02 g/d) than in D3 (0.22 ± 0.04 g/d). The results show that A. annua can be cultivated in aquaponic systems due to its nitrogen removal capabilities.

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“…Fish production, using biofloc systems, linked to hydroponic plant production in aquaponic systems holds the potential to minimise water use and to reduce feeding costs through improved food conversion ratios. Initial trials have demonstrated the availability of minerals from bioflocs in integrated fish and vegetable production (Chappell and Brown, 2010) and the potential to develop aquaponics, based on fish production in biofloc systems, is being researched, with positive results (Pinho et al, 2017). A commercial aquaponics farm operating in a hot arid environment.…”

Section: Aquaponicsmentioning

confidence: 99%

Integrated aquaculture in arid environments

Goddard¹,

Al-Abri

2019

Jour. Agri. & Mar. Scie.

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Around one third of the globe is classified as desert or arid (<200mm rain annually) and most such regions lack food security. Traditional freshwater aquaculture is often a marginal activity and competes with agriculture for limited water resources. Developing technologies offer new opportunities to increase productivity of aquaculture through integration with vegetable production in aquaponic systems and to reduce water requirements through the application of biofloc technology. Aquaponic systems combine aquaculture and hydroponic plant production and are integrated within a re-cycled water system. Fish waste metabolites provide the nutrients for plants grown in soil-less, hydroponic systems. Biofloc farming systems operate with minimum or zero water exchange. Suspended biofloc particles develop in fish tanks under conditions of full aeration and controlled carbon to nitrogen ratios. They comprise algae, bacteria, protozoa and particulate organic matter held in a loose matrix. They provide in-situ treatment of harmful fish metabolites, are protein rich, contain essential fatty acids, vitamins and minerals and supplement the diets of filter-feeding farmed species. The integration of fish culture with vegetable production provides new opportunities for small and medium enterprises. Integrated farms occupy a small footprint, optimise the use of resources and can be built close to population centres. This paper reviews current developments in aquaponics and biofloc technology against the background of food security needs in arid regions.

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Effluent from a biofloc technology (BFT) tilapia culture on the aquaponics production of different lettuce varieties

Cited by 86 publications

References 27 publications

Zootechnical Performance Evaluation of the Use of Biofloc Technology in Nile Tilapia Fingerling Production at Different Densities

Zootechnical Performance Evaluation of the Use of Biofloc Technology in Nile Tilapia Fingerling Production at Different Densities

Growth and Nutrient Removal Efficiency of Sweet Wormwood (Artemisia annua) in a Recirculating Aquaculture System for Nile Tilapia (Oreochromis niloticus)

Integrated aquaculture in arid environments

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