Northern Vietnamese Fish Farmers Receive IPRS Technical Assistance

By - Tuesday, February 25, 2020

USSEC recently provided technical assistance to Northern Vietnam fish farmers.

USSEC Thailand Technical Manager – Aquaculture Chuchai Kanjanamayoon visited Northern Vietnam from January 6 to 12 to exchange knowledge of Thailand’s In Pond Raceway System (IPRS) with Northern Vietnam farmers. Most of the standard IPRS systems in that part of Vietnam are not yet fully installed or completed.

The USSEC team discovered several issues in different matters and created the following checklist during the visit. The checklist will help the team to identify and improve on each individual IPRS so fish farmers will receive maximum benefits from USSEC’s recommendations.

Area (m2) 
Water depth (m) 
Volume of water (m3) 
Number of Cells 
Cell dimension 
Total Number of White Water Units (WWU) 
WWU in the pond, Y or N 
Number of WWU in the pond 
WWU – floating (Y or N) 
WWU – Fixed (Y or N) 
With Extra WWU (Y or N) 
Air Blower/Compressor 
Supplementary Aeration System (Y or N) 
Number of Screen Groove – after the WWU 
Number of Screen Groove -after the production cell  
Number of Screen Groove after the Quiescing Zone (QZ)  
QZ, Y or N 
IQZ is 3m 
QZ is 6m  
Net gate after QZ 
Waste collector (working well, Y or N) 
Sludge Collection Vessel / Tank (Y or N) 
Waste treatment (Y/N) 
Working Walkway Upstream (after the upstream screen gate)  
Working Walkway Downstream (before downstream screen gate)  
Baffle, Y or N 
Baffle opening (100%, 200%, 300%) 
Generator – Manual Start (Y or N) 
Generator – Automatic Start-up (Y or N) 
Electric Supply (Single Phase or Three Phase) 
Water Source/Supply (Irrigation, Rain Fed, Deep Well, Bore Hole) 
Water supply regular? 
Species stocked in cells 
Species stocked in pond 
Animals/livestock in/around pond 
Grass/vegetable in/on pond 
Commercial feed 
Self-formulated feed 
Others (grass, vegetable…) 
Disinfection regularly? 
Well maintaining equipment? 
Well feed management? 
Speed of water current in cells (strong/moderate/weak) 
IPRS (Y or N) 
IPRS-Like (Y or N) 


For example,

  1. Dau Duc Kinh’s pond is too small for IPRS 3 cells. Additionally, it is the wrong dimension with no gate at QZ zone, no supplementary aeration, and not enough WWU in an open pond.
  2. Nguyen Cong Chinh’s ponds are too small for 2 cells. Also, his operation does not have supplementary aeration, and the blower is noisy and the wrong dimension.
  3. Nguyen Van Kien has the correct size pond and has already corrected ratio of water volume to raceways. There is not enough WWU outside the pond and the QZ zone is only 3 meters and needs to be adjusted to a 6m QZ zone.

According to Dr Thanh, USSEC Technical Manager – Northern Vietnam, there are many IPRS which do not meet the standard requirements. He will check and let the team know which to monitor.

Many farmers installed the system quickly and without following the correct standards. The engineering blueprints will be distributed to them so that they can follow the correct IPRS design. A certificate or label will be given to the farmers who pass the standard so that other farmers can learn from the design.

It is still an ongoing process to develop IPRS in each country. Thailand has a first corrected standard and this farm should be used to create awareness for the farmers.

In February, USSEC plans to bring ten Vietnamese farmers to visit IPRS in Thailand.

“IPRS Technology will be the future system for the location risk on water supply shortage,” Dr. Jesse Chappell, the author of IPRS technology has previously stated.

U.S. Soy usage will increase as fish production increase. The inclusion of U.S. soybean meal in aquafeed is currently about 20 to 30%.


The QZ zone is too short only 3 m instead of 6 m



The ratio of water volume and raceway are too low