The fish tanks/ basins made from HDPE or PP standard equipped with: Water outflow connection with grid Water level stand-pipe Emergency oxygen diffuser Level sensor
Removal of solids from faeces and uneaten feed (SS removal) Decomposition of dissolved organic solids (BOD/COD removal) Conversion of (toxic) ammonium into nitrite (nitrification) Conversion of nitrite to nitrate and further to N2 gas (denitrification) Phosphorus removal (de-phosphate) Removal of carbon dioxide (Co2)
Water returning from the fish tanks enters the first phase of the treatment unit, the self-cleaning mechanical filter. Here water passes through a fine mesh, a micro screen. The solids (mainly fish faeces) flows as effluent to the waste water treatment.
Moving bed; biological filtration
Moving bed biological filter consist of a sump filled with a biofilter material (small plastic particles). The water is continuously aerated, causing the biofilter movement. Result, removal of Ammonia, dissolve organic material and stripping the carbon dioxide.
Trickling, fixed bed filtration
Closed tower filled with bio media and water dispensing system. Bacteria break down waste products. Aeration is used to add oxygen and strip carbon dioxide. Result, Add oxygen, removal of Ammonia, dissolve organic material and stripping the carbon dioxide.
The protein skimmer is used to remove fine solids and protein. In the reactor in where foam is created by aerating the water with a centrifugal pump driven venturi
Ultra violet filter
The UV technology method is based on the natural disinfectant action of the sun’s rays. UV lamps imitate the disinfecting rays of the sun. The UV systems produce the same ultraviolet germicidal rays, just thousands of times stronger. No bacteria, viruses can withstand this treatment. The reaction time between the UV irradiation and the organism to be killed is very short and does not create any by-products at all.
Water that has passed the treatment unit is ready for re-introduction to the fish tanks. For intensive fish farming, super saturated water is required. This filtered water is pumped through a ‘reactor’, a high-pressure vessel, in here water becomes supersaturated with oxygen. Achieved by a combination of gas exchange and by static pressure on the water. The quantity of oxygen is automatically dosed.
Oxygen control panels
The dissolved oxygen (DO) is measured in oxygen control unit. Pure oxygen from an oxygen generator or from a liquid oxygen source, directed to an oxygen reactor via the oxygen control panel. In case of power failure automatically an emergency diffuser system opens The Oxygen is delivered on the demand, avoiding unnecessary oxygen loss.
In order to transport water from filter to fish tanks, centrifugal pumps are used. All pumps are upgraded to the required conditions like temperature and salinity level of the system water
Ozone can play important roles in the prevention and elimination of fish diseases in aquaculture systems. This powerful oxidizing agent disinfects and oxidizes organic pollutants while increasing the water's dissolved oxygen level. The end result is exceptional water quality, which is a fundamental requirement for intensive fish farming.
Cooling and heating system
Fish species live under different conditions such as temperature. Automatic regulation and control of the system water is required. the system is supplied as complete turn key solution.
In case of energy failure, the stand-by diesel generator takes over automatically. Complete installed including net overtake.
All electrical items and sensors are controlled in the switchboards. complete installed incl. main electricity board, current control and back up board.
Pipe connection network
Complete installation of the pipe network. • Outflow and inflow between tanks and filter • Effluent from filters to waste water treatment • Oxygen • Electricity • Heating and Cooling
Waste water treatment All effluent from the filters are collected and treated by the waste water treatment before discharge to municipal system, pond, channel or river. The waste water unit is a combination of de-nitrification filter and de-phosphating filter. impressive results are achieved. Test results are available of several years of on-site tests in real-life conditions at different fish farms and conditions.
Control system The control unit, measures and control the parameters plus pressure and water levels
PSA oxygen generator Pure oxygen is essential in all indoor fish farms. Oxygen generator is the alternative for liquid oxygen supply. Average performance/consumption is 1KW/kg o2
Feeders Automatic feeding by computer program, stationary feeders or Robot. The stationary feeders are available with 1,6,9 and 50 ltr hoppers. Feeding size 0.3-8mm. The dosing from 0.1 till 100 gr.