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Participation in Forum on January 16, 2020
Hi Sanu. Using the same design architecture to that developed at Chambo Fisheries we are busy on a 250 tonne per annum BFT multi-cohort sequential system which will run at 35ppt (seawater) raising Mozambique tilapia (O. mossambicus). The sub-surface aeration system will drive the needed horizontal water movement to achieve 30cm/sec current speed, strip CO2 and add dissolved oxygen very efficiently ...
Participation in Forum on January 16, 2020
Hi Sanu Thanks for your comments. I believe the need for efficient gas stripping, particularly CO2 levels, from BFT culture water, which requires conventional aeration and possibly the use of a combination nano bubble system may have some merit. This will require elaborate testing in a research environment prior to commercial use. A control will enable the merits (or not) of the use of nano bubbl ...
Participation in Forum on September 24, 2019
Hi Harish. The problem with nano-bubble aeration is that it does little to remove other gases (gas stripping) such as carbon dioxide in the water mass in BFT. Also when the nano-bubbles collapse they release allot of energy due to the internal pressure within the nano-bubble. This concerns me as this could impact on the bacteria. One study in Japan confirmed my fears on this. I think the safest ap ...
Participation in Forum on February 18, 2019
Dear Atul, Dilip and Sujith I will respond very soon. I'm very tied up chasing a deadline on an important task at the moment. Give me a couple of days. Best Ramon
Participation in Forum on November 18, 2018
Participation in Forum on July 31, 2018
Hi NeilThe only way to maximize throughput production relative to maximum carrying capacity is via the management of a single tank system as a multi-cohort sequential stock management system. This we call the Production: Capacity Ratio (P:C ratio). Apart from reduced CAPEX per unit fish production, the benefits filter down to energy costs for aeration, carbon dioxide stripping and horizontal water ...
Article published the July 27, 2018
Feeds and feeding systems at Chambo Fisheries in Africa Mozambique tilapia (O. mossambicus, left) and Shiranus tilapia (O. shiranus, right) at Chambo Fisheries.(Editor’s note: This is part 2 of a three-part series. Read part 1.)Biofloc technology (BFT) is a new aquaculture practice currently revolutionizing the shrimp farming sector in Asia and South America. BFT is a sustainable and en ...
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Article published the July 27, 2018
Comparative economics and environmental performance vs. conventional grow-out systemsHarvesting tilapia from cages in Lake Kariba, Zimbabwe.Biofloc technology (BFT) promises to revolutionize tilapia and shrimp aquaculture industries globally. In fact, leading scientists believe that harnessing the flow of microbes to fish represents the next revolution in food production (see part 1 and part2 of t ...
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Article published the July 27, 2018
Malawi — a Fish Eating NationAlthough Malawi is endowed with the ninth largest lake in the world and the third largest and second deepest lake in Africa, overfishing resulted in the collapse of the tilapia fishery around 1990- 1991. Tilapia, known locally as chambo, is the country’s favorite fish and now costs from US$ 4.00-8.00/kg (R55-110/ kg) for whole or live fish.This is a result ...
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Participation in Forum on June 22, 2018
Hi BarryI'm glad you found value in the article. As mentioned in the article. A new wave of higher quality marine cultivated tilapia distinguished through branding simultaneously scooping-up top honors by seafood sustainability movements (RAS, BFT, IMTA etc) will be key to a new growth phase for tilapia aquaculture.We all need to stay the course!!!Best,Ray Kourie
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