Nitrogen removal techniques in aquaculture for a sustainable production

Crab, Roselien; Avnimelech, Yoram; Defoirdt, Tom; Bossier, Peter; Verstraete, Willy

doi:10.1016/j.aquaculture.2007.05.006

Cited by 671 publications

(455 citation statements)

References 80 publications

Supporting

Mentioning

360

Contrasting

Unclassified

Order By: Relevance

“…Beamish and Tandler, 1990;Crab et al, 2007), that this was not apparent over the 13 rivers here might relate to two issues. Firstly, Wood (2004) revealed that, when under toxicity thresholds, fish growth rates are often positively related to ammonia concentrations as they stimulate protein synthesis without increasing food consumption, thus leading to higher growth rates.…”

Section: Figurementioning

confidence: 85%

Influences of environmental and chemical parameters on the spatial growth patterns of four riverine cyprinid fishes

Liu

Chen

Britton

2015

Knowl. Manag. Aquat. Ecosyst.

View full text Add to dashboard Cite

Key-words:roach, chub, disturbance, somatic growth, environmental change Understanding intraspecific variability in fish somatic growth rates is important as growth is a key life history trait that plays a fundamental role in many biological and ecological processes. Here, the influence of environmental and chemical parameters was tested on intraspecific variability in growth rates of the cyprinid fishes roach Rutilus rutilus, chub Squalius cephalus and dace Leuciscus leuciscus across 13 rivers in England, and also compared with those for barbel Barbus barbus from the same rivers. Outputs indicated that growth rate responses to the parameters were species-specific, with more significant effects generally detected on juvenile growth than lifetime growth. For R. rutilus and S. cephalus, latitude (as a surrogate of temperature) was the most significant predictor of their growth rates, with growth rates decreasing as latitude increased. Contrary to prediction, aspects of degraded water quality accelerated the growth rates of these fishes, except in B. barbus, although concentrations of nitrogenous compounds were below toxicity thresholds. This emphasizes the ability of populations of these cyprinid fishes to tolerate some environmental disturbances and, in entirety, suggests that the intraspecific variability in the growth rates of these fishes is significantly influenced by abiotic parameters and their association with levels of anthropogenic disturbance. RÉSUMÉ

show abstract

Section: Figurementioning

confidence: 85%

Influences of environmental and chemical parameters on the spatial growth patterns of four riverine cyprinid fishes

Liu

Chen

Britton

2015

Knowl. Manag. Aquat. Ecosyst.

View full text Add to dashboard Cite

show abstract

“…Moreover, the intensification will lead to heavy dependence on fish meal which is a scarce commodity, disease outbreaks in the cultured organisms, environmental degradation, and socioeconomic conflicts. In an attempt to minimize the impact of the environmental, health, and economic problems associated with aquaculture, BFT has become increasingly popular as a sustainable alternative for intensification (Avnimelech 1999(Avnimelech , 2006Crab et al 2007;De Schryver et al 2008). The requirements for sustainable and eco-friendly aquaculture development can be fulfilled by the use of biofloc technology.…”

Section: Resultsmentioning

confidence: 99%

“…L. vannamei production rates and water quality were maintained without water exchange using a biofloc system supplemented with dextrose or molasses (Antonio et al 2015). According to Avnimelech (2007) and Emerenciano et al (2013b), the bioflocs are rich in natural protein and lipid and hence serve as natural in situ food for culture organisms while at the same times act as bio-control to the system by treating the feeding waste and reducing ammonium concentrations (Crab et al 2007;De Schryver et al 2008;Hargreaves 2013) thereby maintaining the water quality. However, further research should focus on the use of cheap and fermented non-conventional agro-industrial residues as carbon sources to upgrade wastes as healthy feeds and to find means of fish meal replacement for the aquatic organisms.…”

Section: Nutritional Composition Of Bioflocsmentioning

confidence: 99%

“…A number of beneficial features are associated with biofloc technology along with 10-20% potential feed gain as estimated by application of biofloc technology (Crab et al 2007;De Schryver et al 2008) to nitrogen recovery from the culture system. This increase was based on the internal recirculation of nutrients through the formation of new microbial biomass, which was subsequently grazed by the fish (Avnimelech 2006).…”

Section: Bioflocs In Aquaculture: Future Prospectusmentioning

confidence: 99%

See 1 more Smart Citation

Biofloc technology: an emerging avenue in aquatic animal healthcare and nutrition

et al. 2017

View full text Add to dashboard Cite

Biofloc is a conglomeric aggregation of microbial communities such as phytoplankton, bacteria, and living and dead particulate organic matter. Biofloc technology involves manipulation of C/N ratio to convert toxic nitrogenous wastes into the useful microbial protein and helps in improving water quality under a zero water exchange system. It may act as a complete source of nutrition for aquatic organisms, along with some bioactive compounds that will enhance growth, survival, and defense mechanisms, and acts as a novel approach for health management in aquaculture by stimulating innate immune system of animals. Nutritionally, the floc biomass provides a complete source of nutrition as well as various bioactive compounds that are useful for improving the overall welfare indicators of aquatic organisms. Beneficial microbial bacterial floc and its derivative compounds such as organic acids, polyhydroxy acetate and polyhydroxy butyrate, could resist the growth of other pathogens, thus serves as a natural probiotic and immunostimulant. The technology is useful in maintaining optimum water quality parameters under a zero water exchange system, thus prevents eutrophication and effluent discharge into the surrounding environment. Moreover, the technology will be useful to ensure biosecurity, as there is no water exchange except sludge removal. The technology is economically viable, environmentally sustainable, and socially acceptable.

show abstract

“…Nitrification is carried out in a wide variety of biofiltration systems, which can be divided into two general types: submerged (e.g. fluidized bed filters, bead filters) fixed film filters and emerged (rotating biological contactors, trickling filters) [6][7][8]. Unfortunately, an ideal biofilter for all purposes does not exist but each biofilter type has their own advantages and limitations [9].…”

Section: Theoretical Backgroundmentioning

confidence: 99%