Microbial diversity of biological filters in recirculating aquaculture systems

Schreier, Harold J.; Mirzoyan, Natella; Saito, Keiko

doi:10.1016/j.copbio.2010.03.011

Cited by 219 publications

(204 citation statements)

References 50 publications

Supporting

Mentioning

177

Contrasting

Unclassified

Order By: Relevance

“…Hence, the differences in nitrogen transformation patterns in freshwater sludge and biofloc reactors were possibly caused by differences in the microbial communities that were responsible for nitrate reduction. The high C/N ratio in the biofloc aquaculture system was one of the major parameters that could influence these differences, as it had been proposed as the favorable condition for DNRA process (van Rijn et al, 2006;Schreier et al, 2010). -N/L **At 25 mg-S 2-/L, only biofloc sample was tested ***At 100 mg-S 2-/L, only freshwater sludge was tested Table 2 -Characteristics of water in freshwater and biofloc aquaculture systems.…”

Section: Results and Discussion Nitrate Reduction In Freshwater Sludgmentioning

confidence: 99%

“…Since a sulfide-rich environment has been hypothesized to favor DNRA (Brunet and Garcia-Gil, 1996;Sher et al, 2008), the presence of the DNRA process is to be expected in this system and should also be an important pathway for nitrate reduction. Apart from sulfide, the high C/N ratio is another factor that promotes the growth of DNRA bacteria (van Rijn et al, 2006;Schreier et al, 2010). The high C/N condition can be found in the biofloc system, which is a type of aquaculture that uses external carbon substrates to enhance the growth of heterotrophic bacteria in the fish tank (Crab et al, 2012).…”

Section: Dnramentioning

confidence: 99%

See 1 more Smart Citation

Denitrification and Dissimilatory Nitrate Reduction to Ammonium (DNRA) Activities in Freshwater Sludge and Biofloc from Nile Tilapia Aquaculture Systems

Chutivisut

Pungrasmi

Powtongsook

2014

J. of Wat. ^|^ Envir. Tech.

View full text Add to dashboard Cite

Suspended organic sludge from freshwater and biofloc Nile tilapia systems were examined for the presence of denitrifying and dissimilatory nitrate reduction to ammonium (DNRA) activities under nitrate and sulfide stimulation. Initial nitrate concentrations at 25 and 100 mg NO 3 --N/L were added to the freshwater sludge and biofloc samples to simulate low and high nitrate levels that are normally found in aquaculture systems. The results showed that freshwater sludge and biofloc both had denitrifying activity immediately after nitrate addition. However, ammonium accumulated in the biofloc reactors but not in the freshwater reactors, indicating the activity of DNRA in the high C/N biofloc particles. The influence of sulfide on nitrate reduction was also studied by adding different concentrations of sulfide along with 100 mg NO 3 --N/L. The results showed that elevated sulfide concentrations partially inhibited denitrification in the freshwater sludge and caused nitrite and ammonium accumulation, in which ammonium formation was probably responsible by DNRA activity. In sulfide-added biofloc reactors, ammonium accumulated at the same level as found in the biofloc reactors without sulfide. Therefore, DNRA bacteria residing in the biofloc aquaculture system were more likely to be heterotrophs that did not use sulfide as their electron donor.

show abstract

Section: Results and Discussion Nitrate Reduction In Freshwater Sludgmentioning

confidence: 99%

Section: Dnramentioning

confidence: 99%

Denitrification and Dissimilatory Nitrate Reduction to Ammonium (DNRA) Activities in Freshwater Sludge and Biofloc from Nile Tilapia Aquaculture Systems

Chutivisut

Pungrasmi

Powtongsook

2014

J. of Wat. ^|^ Envir. Tech.

View full text Add to dashboard Cite

show abstract

“…Studies have revealed that Nitrosomonas sp. formed an important group involved in ammonia oxidation in marine aquaria and moving bed bioreactors of closed RAS (Hovanec and DeLong, 1996;Tal et al, 2003;Schreier et al, 2010). While studying the nitrifying functional genes in coastal aquaculture systems of India, Krishnani (2010) detected amoA sequences exhibiting 82% identity to Nitrosomonas europaea and Nitrosococcus mobilis and 81% identity to Nitrosomonas eutropha.…”

Section: Molecular Analysesmentioning

confidence: 99%

Molecular characterization of the nitrifying bacterial consortia employed for the activation of bioreactors used in brackish and marine aquaculture systems

Kumar

Sukumaran

Achuthan

et al. 2013

International Biodeterioration & Biodegradation

View full text Add to dashboard Cite

a b s t r a c tThe addition of commercial nitrifying bacterial products has resulted in significant improvement of nitrification efficiency in recirculating aquaculture systems (RAS). We developed two nitrifying bacterial consortia (NBC) from marine and brackish water as start up cultures for immobilizing commercialized nitrifying bioreactors for RAS. In the present study, the community compositions of the NBC were analyzed by universal 16S rRNA gene and bacterial amoA gene sequencing and fluorescence in situ hybridization (FISH). This study demonstrated that both the consortia involved autotrophic nitrifiers, denitrifiers as well as heterotrophs. Abundant taxa of the brackish water heterotrophic bacterial isolates were Paenibacillus and Beijerinckia spp. whereas in the marine consortia they were Flavobacterium, Cytophaga and Gramella species. The bacterial amoA clones were clustered together with high similarity to Nitrosomonas sp. and uncultured beta Proteobacteria. FISH analysis detected ammonia oxidizers belonging to b subclass of proteobacteria and Nitrosospira sp. in both the consortia, and Nitrosococcus mobilis lineage only in the brackish water consortium and the halophilic Nitrosomonas sp. only in the marine consortium. However, nitrite oxidizers, Nitrobacter sp. and phylum Nitrospira were detected in both the consortia. The metabolites from nitrifiers might have been used by heterotrophs as carbon and energy sources making the consortia a stable biofilm.

show abstract

“…oxidize ammonia into nitrite and then Nitrospira sp. oxidize nitrite into nitrate [92][93][94]. Although high levels of nitrate are tolerable to fish [92], long-term exposure can be harmful to some species (e.g., Turbot (Psetta maxima)) [92,95].…”

Section: Recirculating Aquaculture Systems (On-land)mentioning

confidence: 99%

The Development of Sustainable Saltwater-Based Food Production Systems: A Review of Established and Novel Concepts

Gunning

Maguire

Burnell

2016

Water

View full text Add to dashboard Cite

Abstract:The demand for seafood products on the global market is rising, particularly in Asia, as affluence and appreciation of the health benefits of seafood increase. This is coupled with a capture fishery that, at best, is set for stagnation and, at worst, significant collapse. Global aquaculture is the fastest growing sector of the food industry and currently accounts for approximately 45.6% of the world's fish consumption. However, the rapid development of extensive and semi-extensive systems, particularly intensive marine-fed aquaculture, has resulted in worldwide concern about the potential environmental, economic, and social impacts of such systems. In recent years, there has been a significant amount of research conducted on the development of sustainable saltwater-based food production systems through mechanical (e.g., recirculatory aquaculture (RAS) systems) methods and ecosystem-based approaches (e.g., integrated multi-trophic aquaculture (IMTA)). This review article will examine the potential negative impacts of monocultural saltwater aquaculture operations and review established (RAS) and novel (IMTA; constructed wetlands; saltwater aquaponics) saltwater-based food production systems and discuss their (potential) contribution to the development of sustainable and environmentally-friendly systems.

show abstract

Microbial diversity of biological filters in recirculating aquaculture systems

Cited by 219 publications

References 50 publications

Denitrification and Dissimilatory Nitrate Reduction to Ammonium (DNRA) Activities in Freshwater Sludge and Biofloc from Nile Tilapia Aquaculture Systems

Denitrification and Dissimilatory Nitrate Reduction to Ammonium (DNRA) Activities in Freshwater Sludge and Biofloc from Nile Tilapia Aquaculture Systems

Molecular characterization of the nitrifying bacterial consortia employed for the activation of bioreactors used in brackish and marine aquaculture systems

The Development of Sustainable Saltwater-Based Food Production Systems: A Review of Established and Novel Concepts

Contact Info

Product

Resources

About