Ammonia Nitrogen Removal in Recirculating Aqua Culture System (RAS)
Recirculating Aqua culture System commonly known as RAS system are gaining popularity for closed loop fish and sea food production under controlled environment due to its numerous benefits such as:
Lower Foot Print
Lower Water Usage
Higher Rearing Density
Better quality of fish and sea food
Higher production rate due to lower mortality
During their different growth phases, fish produces a lot of Ammonia nitrogen which if not removed then affect the fish quality and production quantity.
Conventionally for the removal of Ammonia nitrogen from the RAS water, different carriers based biofilters or MBBRs are utilized for the biological nitrification of the Ammonia present in the RAS water.
Levapor carriers based biofilters/MBBRs offer the most efficient and economical solution for the removal of Total Ammonia present in the water for RAS system.
The high surface area, adsorption capacity due to activated carbon and fine pore structure of Levapor carriers offer distinct advantages compared to conventional plastic carriers for RAS system such as :
Smaller foot print
Quick Process Start up
Lowest possible Ammonia levels in the treated effluent
Higher amount of Simultaneous Nitrification and Denitrification (SNDN) offering lowest TAN load in the recirculating water
Above specific advantages of Levapor carriers application for RAS system results in :
Better Quality and Quantity of Fish Production due to lowering Ammonia toxicity which reduces mortality rates and deformities in the fish stock
Economical production cost
lower environmental foot print due to effective reuse of water
At one of the largest salmon hatchery in Europe, different carriers were compared parallel for their ammonia removal efficiency for the hatchery’s RAS system. The comparative study indicated that Levapor carriers outperformed all other carriers for Ammonia and TAN removal in the system.
Fig 1 : Pilot Biofilters At Dabie Hatchery , Poland for comparative analysis of different carriers.
Fig 2 : Different Carriers compared at Dabie Hatchery
Fig 3 : Ammonia Nitrogen removal trends for different Carriers
With the team of our RAS experts, We offer our clients complete turn key solutions for their RAS requirement. We help our clients to develop specific RAS models based on their type of Fish, local environmental conditions and rearing densities taken into consideration for the RAS system.