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ผู้เขียน หัวข้อ: A prototype, bio-floc shrimp farm called Belize Aquaculture, Ltd  (อ่าน 5919 ครั้ง)
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« เมื่อ: กุมภาพันธ์ 16, 2009, 02:04:15 PM »

Barry Bowen and Robins McIntosh
http://www.shrimpnews.com/MeetFlockers.html
 

Barry Bowen’s name should go down in the history of shrimp farming as a great visionary who put his own money on the line to build, in 1997, a prototype, bio-floc shrimp farm called Belize Aquaculture, Ltd., which, in 2000 and 2001, expanded into a full-fledged commercial venture with close to 75 acres of ponds in super-intensive production.  During its first commercial run, the farm produced at the rate of 30,000 pounds per acre per year!  In 2006, Bowen installed his own power plant and embarked on a new expansion of the farm.

 

Robins McIntosh supervised construction, technology development and start-up operations at Belize Aquaculture, Ltd.  He currently works for Charoen Pokphand, a huge conglomerate in Thailand and a major international supplier of shrimp feeds.  He helped implement the bio-floc technology on a huge CP shrimp farm in Indonesia.

 

At the fifth Central America Symposium on Aquaculture (Honduras, August 1999), Bowen and McIntosh were the first to describe the commercial implementation of bio-floc shrimp farming.  Bowen said: My primary objective was to develop an environmentally friendly shrimp farm in Belize, a 100% eco-friendly shrimp farm, a shrimp farm with no effect on the environment.  That was a tough assignment.  In reality, the only way it could be done was with zero-exchange ponds.

 

With zero-exchange, energy costs are high because aeration is necessary around the clock to keep the system working.  We decided to go with 12-horsepower of aeration per acre, a stocking density of 125 PLs per square meter, and a projected harvest of 10,000 pounds per acre per crop, with 2.4 crops per year, for total production of approximately 25,000 pounds per acre per year.

 

When I first presented Robins McIntosh with these figures, he shook his head and said, “Impossible, I could probably guarantee you 7,000 pounds per acre per crop, but anything above that with today’s technology would not be possible.”

 

Well, after two years of growing shrimp in our system, we have exceeded those original goals.  We are now producing an average of 14,000 pounds per acre per crop, with 2.4 crops per year.  And we’ve had much higher yields than that from several ponds.  Two weeks ago, one of our harvests yielded 24,000 pounds of 21-22 gram animals per acre.

 

We are using technology that could be deployed in any warm climate.  You don’t have to be at sea level or anywhere near the coast.  You could do it in the middle of the Sahara Desert.

 

At the Fourth Latin American Aquaculture Congress and Exhibition (Panama, October 2000), Robins McIntosh described some of the farm’s practices:

 

All of our ponds are lined because of our sandy soil, but liners also have many other benefits.  Soils become a nonfactor with liners, eliminating all the soil science and the restrictions that soils place on site selection.  After a harvest, there’s not a lot of sludge or detritus left; we wash what’s left into a settling basin, and within six days the pond can be filled and restocked.  That pond will be in production 355 days a year.  We don’t have to dry out the bottom, we don’t have to plough it, we don’t have to lime it.  We sun sterilize the bottom and then refill the pond with the same water that came out of it.  It’s free of sediment, but full of nutrients, so no fertilizer is necessary.

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