Grouper Farming RAS

Groupers are mostly monandric protogynous hermaphrodites, i.e. they mature only as females and have the ability to change sex after sexual maturity. Some species of groupers grow about a kilogram per year and are generally adolescent until they reach three kilograms, when they become female. The largest males often control harems containing three to 15 females. Groupers often pair spawn, which enables large males to competitively exclude smaller males from reproducing. As such, if a small female grouper were to change sex before it could control a harem as a male, its fitness would decrease. If no male is available, the largest female that can increase fitness by changing sex will do so.

 

RAS Recirculating aquaculture system 

Recirculating Aquaculture System (RAS) series of treatment processes is utilized to maintain water quality in intensive fish farming operations. These steps of Recirculating Aquaculture System (RAS) are often done in order or sometimes in tandem. 
After leaving the vessel holding fish the water is first treated for solids before entering a biofilter to convert ammonia, next degassing and oxygenation occur, often followed by heating/cooling and sterilization. Each of these processes can be completed by using a variety of different methods and equipment, but regardless all must take place to ensure a healthy environment that maximizes fish growth and health.

Sand Filters Of Recirculating Aquaculture System (RAS): 

No. Diameter ΦD (mm) Port Size (inch) Flow (m³/H) Filtration Area(m2) Sand Weight (kg)
CAT-SF400 400 40 8 0.13 35
CAT-SF500 500 40 11 0.18 60
CAT-SF600 600 40 14 0.22 115
CAT-SF700 700 40 19 0.35 180
CAT-SF800 800 50 24 0.5 275
CAT-SF900 900 50 30 0.64 390
CAT-SF1050 1050 50 38 0.88 615
CAT-SF1200 1200 50 42 1.3 920
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Drum Filters Of Recirculating Aquaculture System (RAS): 

No. Flow (m³/H) Influent caliber (mm) Effluent caliber (mm) Average power (KW) Voltage Filtering precision(μm) Size (CM)
CAT-DF30 30 160 75 0.2 220-50Hz 30-200 105*95*100
CAT-DF60 60 200 90 0.3 220-50Hz 30-200 125*115*110
CAT-DF100 100 250 110 0.5 220-50Hz 30-200 150*130*120
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