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How Many Shrimp Hatcheries Use Recirculating Systems?  Not Many!

October 8, 2010

 

CML Prawn Hatchery (cml_prawnhatchery@yahoo.com): Are there any tiger shrimp (Penaeus monodon) hatcheries out there that recycle their water?

 

Leland Lai (lelandlai@aquafauna.com): Very few hatcheries in Asia use water recirculation systems.  In the western hemisphere, broodstock facilities use them, but not many hatcheries.

 

With broodstock facilities, the investment in water recirculation systems is more than paid back in higher fecundity, lower water treatment costs and biosecurity.

 

In 2010, we have installed several recirculating maturation systems in Central and South America for P. vannamei with capacities up to 200 gallons per minute (750 l/m).  We didn’t get the work because the water source was polluted, but because of the overall benefits from biosecurity and the retained pheromones in the water, which are highly diluted in flow-through systems.  Further, the operational costs, like pumping, heating and chilling, are minimized because recirc systems are all low head systems.  Recirc systems are particularly effective in biosecurity for quarantine, in SPF facilities and for nucleus breeding centers.

 

You can contact us off-line at http://www.aquafauna.com.

 

Dallas Weaver (deweaver@mac.com): I have never designed a recirc hatchery for monodon, just for vannamei.  I did raise monodon in a recirc system, and I don’t know of anything that would be different on the water treatment part of the system.

 

For filtration in broodstock facilities, I always use high performance fluidized beds, similar to those sold by Aquaneering [Weaver has a long-standing business relationship with Mark Frances at Aquaneering.]

 

Anil Ghanekar (anilghanekar@yahoo.com): Yes, we have set up recirc systems for monodon hatcheries, nurseries and maturation facilities.  Recently we setup some recirc systems at vannamei hatcheries.  They were very similar to the systems we developed for monodon, except the male vannamei maturation tanks required chillers to keep water temperatures down.

 

Sources: 1. The Shrimp List (a mailing list for shrimp farmers).  Subject: Closed Water Circulation System in Prawn Hatchery.  September 2, 2010. 2. Bob Rosenberry, Shrimp News International, October 8, 2010.

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