Our standard PLASMA sterilization equipment was developed for a 500 L tank. To meet a customer’s requirements for a 35-tonne pool, we provided a customized solution with measures to improve treatment performance.

1. Application plan and performance improvements

1. Oxygen supply in place of air

• Plan: replace the plasma generator’s air supply with high-purity oxygen.

• Effect: increase reactive oxygen species (ROS) concentration to improve sterilization and oxidation capacity.

1. Pump-driven circulation and mixing

• Plan: use a seawater pump to distribute plasma gas evenly throughout the pool.

• Effect: active substances spread quickly throughout the pool, providing treatment across the entire water volume.

1. 4 eductor nozzles + 2 micro-bubblers

• Plan: install mixing and micro-bubble injection components at the outlet.

• Effect: improve gas dissolution and dissolved oxygen, strengthening sterilization while improving the breathing environment for fish.

1. Higher-capacity equipment (APG-002 model)

• Plan: replace the smaller model with dedicated higher-capacity equipment.

• Effect: increase processing capacity to provide stable sterilization performance in a large pool.

1. Applying Henry’s law: low temperature + 3 bar pressure

• Plan: adjust water temperature and pressure to maximize the solubility of active substances.

• Effect: extend the residence time of active substances in water and improve sustained sterilization.

---

2. Overall results

• Stable, continuous sterilization in a 35-tonne pool.

• Reduced pathogens in the pool, with the potential to improve fry survival.

• Customized design to meet customer requirements and improve aquaculture operating efficiency.

  Summary: the plasma sterilization solution can be extended from standard 500 L tanks to 35-tonne pools. This case illustrates customization for a customer’s operating environment.

■ Key improvements and effects of the customized solution

1. Oxygen supply in place of air

• Purpose: maximize plasma generation efficiency and increase reactive species (ROS and RNS) concentrations.

• Effect: increase production of ozone, hydroxyl radicals (OH) and other active substances, improving sterilization speed and coverage against pathogens.

1. Seawater pump circulation and mixing

• Purpose: distribute plasma gas evenly throughout the water.

• Effect: improve gas dissolution and reduce untreated zones for uniform sterilization.

1. 4 eductor nozzles + 2 micro-bubblers

• Purpose: produce micro-bubbles and strong mixing in the water.

• Effect: micro-bubbles improve gas dissolution and reactivity; eductor nozzles strengthen turbulent mixing to distribute active substances evenly.

1. Higher-capacity APG-002 model

• Purpose: provide the treatment capacity required for a 35-tonne pool.

• Effect: substantially increase capacity compared with the original 500 L model, providing stable sterilization in a large aquaculture environment.

1. Optimizing temperature and pressure using Henry’s law: low temperature + 3 bar pressure

• Purpose: maximize gas solubility through physical conditions.

• Effect: lower temperature increases the solubility of oxygen and active substances; 3 bar pressure increases dissolved gas concentration and extends the residence time of sterilizing components for a longer-lasting effect.

※ Overall outcome

1. Extend the application of the original 500 L equipment to provide a solution for a 35-tonne pool.

2. Customer-specific optimization of oxygen supply, mixing, nozzles and bubblers, main-unit capacity, pressure and water temperature maximizes sterilization capacity, reduces aquatic animal mortality and improves pool hygiene management.

3. Available as a customized model for aquaculture farms.