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
....	...	...	...	...	...

 

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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