Penaeus Vannamei
Shrimp
Location
Parameters
Dissolved oxygen, growth (height, weight, size), virus, bacteria, FCR, survival rate, food productivity.
Type of case study
Penaeus vannamei shrimp growth using nanobubble
Date
September – December 2018
Parameters
Dissolved oxygen, growth (height, weight, size), virus, bacteria, FCR, survival rate, food productivity.
Type of case study
Penaeus vannamei shrimp growth using nanobubble
Date
September – December 2018
Introduction
In order to improve the dissolved oxygen (DO) levels in shrimp farming ponds, this study examines the application of nanobubble technology, with a specific focus on *Penaeus vannamei* (white-leg shrimp). Because of their high surface area, charge, and nanosize, nanobubbles facilitate gas dissolution and raise DO concentrations. This technology is essential for shrimp growth, water quality, and farm output. In indoor raceway ponds, the study looked at how nanobubbles affected the following: pond carrying capacity, shrimp development, feed conversion ratio, survival rate, levels of virus and bacteria, and overall productivity.
The Problem
Maintaining appropriate dissolved oxygen (DO) levels in ponds is a concern in shrimp farming, especially when raising Penaeus vannamei (white-leg shrimp). Low DO levels can cause high feed conversion ratios (FCR), poor growth, decreased survival rates, and increased susceptibility to bacteria and viruses in shrimp. These variables restrict the farm’s carrying capacity and overall output, which lowers profitability.
Recommended Solutions :
The introduction of nanobubble technology to shrimp farming ponds is proposed as a solution. Nanobubbles, due to their unique properties such as high surface area, electric charge, and nanosize, can dissolve gases like oxygen more efficiently in water. This improves the overall DO levels in the pond, which is crucial for optimizing shrimp growth, enhancing water quality, reducing levels of bacteria and viruses, and increasing productivity.
Implementation :
Avior Aqua is a water technology company that specializes in nanobubble treatments. The following metrics and DO levels in these ponds were routinely observed: Pond carrying capacity, growth rates of shrimp, feed conversion ratio (FCR), survival rate, levels of bacteria and viruses, total output pond treated with nanobubbles, and control ponds with traditional aeration methods were compared.
Results :
BEFORE
AFTER
| Sr.No. | Parameter | Measurement | Without Nanobubble | With Nanobubble |
|---|---|---|---|---|
|
1 |
Weight |
gm |
13.10gm
|
15.10gm
|
|
2 |
Height |
cm |
11.55cm |
12.70cm |
|
3 |
Survival rate |
% |
78% |
95% |
|
4 |
Harvest |
kg |
222kg |
436kg |
|
5 |
Productivity
|
kg/m3 |
4.4kg/m3 |
8.7kg/m3 |
|
6 |
DO |
mg/L |
9.0mg/L-10.8mg/L |
4.5-7mg/L |
Conclusion
According to the current research, nanobubbles may raise the DO concentration in the P. vannamei shrimp pond, improving the growth environment. The measured nanobubble size was 80 nm, and its zeta potential was found to be -26 mV.
After being kept for a week, the stability of the nanobubble was restored on water, allowing the oxygen levels in the nanobubble pond to be kept within the range of 4-6 mg/L. While SR increased to 95%, total Vibrio bacteria and FCR were lowered to 2.0 × 103 CFU/mL and 1.1, respectively. These favourable conditions brought about by the presence of nanobubbles also had a major impact on shrimp growth, resulting in an average weight of 15.10 g and an average length of 13.10 cm. This proved to double the overall harvest and productivity to 436 kg and 8.7 kg/m3, respectively.
After being kept for a week, the stability of the nanobubble was restored on water, allowing the oxygen levels in the nanobubble pond to be kept within the range of 4-6 mg/L. While SR increased to 95%, total Vibrio bacteria and FCR were lowered to 2.0 × 103 CFU/mL and 1.1, respectively. These favourable conditions brought about by the presence of nanobubbles also had a major impact on shrimp growth, resulting in an average weight of 15.10 g and an average length of 13.10 cm. This proved to double the overall harvest and productivity to 436 kg and 8.7 kg/m3, respectively.