Effects of temperature on growth, hematology, and immune responses of subadult Chinese sturgeon ( Acipenser sinensis Gray 1835) under different ammonia nitrogen conditions in recirculating aquaculture system

2018 ◽  
Vol 35 (1) ◽  
pp. 313-322
Author(s):  
Haigeng Zhang ◽  
Qi Ni ◽  
Yulei Zhang ◽  
Fan Wu ◽  
Huang Liu ◽  
...  
Keyword(s):  
Immune Responses ◽  
Ammonia Nitrogen ◽  
Chinese Sturgeon ◽  
Recirculating Aquaculture System ◽  
Acipenser Sinensis ◽  
Recirculating Aquaculture ◽  
Aquaculture System ◽  
Effects Of Temperature ◽  
Nitrogen Conditions

Nitrification in brackish water recirculating aquaculture system integrated with activated packed bed bioreactor

2010 ◽  
Vol 61 (3) ◽  
pp. 797-805 ◽  
Author(s):  
V. J. Rejish Kumar ◽  
Valsamma Joseph ◽  
Rosamma Philip ◽  
I. S. Bright Singh
Keyword(s):  
Packed Bed ◽  
Ammonia Nitrogen ◽  
Recirculating Aquaculture System ◽  
Removal Rates ◽  
Packed Bed Bioreactor ◽  
Term Operation ◽  
Total Ammonia Nitrogen ◽  
Recirculating Aquaculture ◽  
Aquaculture System ◽  
Total Ammonia

Recirculation aquaculture systems (RAS) depend on nitrifying biofilters for the maintenance of water quality, increased biosecurity and environmental sustainability. To satisfy these requirements a packed bed bioreactor (PBBR) activated with indigenous nitrifying bacterial consortia has been developed and commercialized for operation under different salinities for instant nitrification in shrimp and prawn hatchery systems. In the present study the nitrification efficiency of the bioreactor was tested in a laboratory level recirculating aquaculture system for the rearing of Penaeus monodon for a period of two months under higher feeding rates and no water exchange. Rapid setting up of nitrification was observed during the operation, as the volumetric total ammonia nitrogen removal rates (VTR) increased with total ammonia nitrogen (TAN) production in the system. The average Volumetric TAN Removal Rates (VTR) at the feeding rate of 160 g/day from 54–60th days of culture was 0.1533 ± 0.0045 kg TAN/m3/day. The regression between VTR and TAN explained 86% variability in VTR (P < 0.001). The laboratory level RAS demonstrated here showed high performance both in terms of shrimp biomass yield and nitrification and environmental quality maintenance. Fluorescent in-situ Hybridization analysis of the reactor biofilm ensured the presence of autotrophic nitrifier groups such as Nitrosococcus mobilis lineage, Nitrobacter spp and phylum Nitrospira, the constituent members present in the original consortia used for activating the reactors. This showed the stability of the consortia on long term operation.

Variation of Water Quality in Fish Farm Using Recirculating Aquaculture System for Fancy Carp

2018 ◽  
Vol 19 (1) ◽  
pp. 37-45
Author(s):  
Woo Jin Lee ◽  
Seon Woo Baek ◽  
Ha Na Seo ◽  
Byeong Wook Kong ◽  
Deog Gwan Ra ◽  
...  
Keyword(s):  
Water Quality ◽  
Fish Farm ◽  
Recirculating Aquaculture System ◽  
Recirculating Aquaculture ◽  
Aquaculture System

scholarly journals Denitrification Control in a Recirculating Aquaculture System—A Simulation Study

Processes ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1306
Author(s):  
Pedro Almeida ◽  
Laurent Dewasme ◽  
Alain Vande Wouwer
Keyword(s):  
Carbon Source ◽  
Carbon Sources ◽  
Aquatic Organisms ◽  
Operating Conditions ◽  
Toxic Substances ◽  
Recirculating Aquaculture System ◽  
Treatment Technology ◽  
Tuning Method ◽  
Recirculating Aquaculture ◽  
Aquaculture System

The recirculating aquaculture system (RAS) is a land-based water treatment technology, which allows for farming aquatic organisms, such as fish, by reusing the water in the production (often less than 5%). This technology is based on the use of filters, either mechanical or biological, and can, in principle, be used for any species grown in aquaculture. Due to the low recirculation rate, ammonia accumulates in the system and must be converted into nitrate using nitrification reactors. Although less toxic for fish, nitrate can also be further reduced into nitrogen gas by the use of denitrification biofilters which may create several issues, such as incomplete denitrification, resulting in toxic substances, such as nitrite and nitric oxide, or a waste of carbon source in excess. Control of the added quantity of carbon source in the denitrification biofilter is then mandatory to keep nitrate/nitrite concentrations under toxic levels for fish and in accordance with local effluent regulations, and to reduce costs related to wasted organic carbon sources. This study therefore investigates the application of different control methodologies to a denitrification reactor in a RAS. To this end, a numerical simulator is built to predict the RAS behavior and to allow for the comparison of different control approaches, in the presence of changes in the operating conditions, such as fish density and biofilter removal efficiency. First, a classical proportional-integral-derivative (PID) controller was designed, based on an SIMC tuning method depending on the amount of ammonia excreted by fish. Then, linearizing and cascade controllers were considered as possible alternatives.

scholarly journals Effect of CO2 on elemental concentrations in recirculating aquaculture system tanks

Aquaculture ◽  
2019 ◽  
Vol 511 ◽  
pp. 734254
Author(s):  
Shazia N. Aslam ◽  
Sharada Navada ◽  
Gisle R. Bye ◽  
Vasco C. Mota ◽  
Bendik Fyhn Terjesen ◽  
...  
Keyword(s):  
Recirculating Aquaculture System ◽  
Elemental Concentrations ◽  
Recirculating Aquaculture ◽  
Aquaculture System

scholarly journals Start-up of a “zero-discharge” recirculating aquaculture system using woodchip denitrification, constructed wetland, and sand infiltration

2021 ◽  
Vol 93 ◽  
pp. 102161
Author(s):  
Jani T. Pulkkinen ◽  
Anna-Kaisa Ronkanen ◽  
Antti Pasanen ◽  
Sepideh Kiani ◽  
Tapio Kiuru ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Recirculating Aquaculture System ◽  
Recirculating Aquaculture ◽  
Aquaculture System ◽  
Start Up ◽  
Zero Discharge
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