Water treatment method in U / V

Benefits of UV water treatment

1. Sterilization is possible immediately compared to other water treatments.

2. It is stable from other ozone or chemical water treatment to out of control.

3. Lower total cost than other ozone or chemical water treatment.

The difficulty of UV water treatment

1. It is highly influenced by turbidity material.

2. After a long time, the effect of the lamp drops.

Solution of UV water treatment

1. Removal of solids and removal of suspended solids should be avoided (due to the effect of turbidity material) (skimmer and filter required).

2. You should not use it too long with steady management and maintenance.

※ In case of U / V seawater treatment, please contact us.

How to treat seawater with ozone

Seawater treatment using ozone

1) Virus inactivation and pathogen control (UV → ozone treatment change direction)

2)  Continuous stabilization of influent water quality (turbidity improvement, decomposition of organic matter, improvement of D.O.)

3)  Reducing the mortality rate of farms (including water-based farms)

4)  The improvement of water quality can actively reduce the net exchange rate.


5)  Prevent spread of fish diseases in nearby farms due to suppression of disease source emissions


6)  Unlike the electrolysis method, it keeps its effect even when high turbidity is introduced.


7)  The control of ozone injection amount is very simple and easy compared with sodium hypochlorite by electrolysis. (Especially in case of turbidity in summer)


8)  The durability of the ozone generator is high (more than 12 years of use)


9)  It can be directly applied to the inflow pipe of existing site.


10) With the development of technology, the usage of the device is simple and anyone (non-expert) can drive it.

<Technical Summary>

•Since ozone is applied to seawater in the sea water because of the presence of bromine ion (Br-) at about 67ppm, unlike general freshwater aquaculture, it requires high technology and experience for safety.

•It reacts with bromine ions in ozone and seawater to produce HOBr or OBr -, so foreign matter can be defined as TRO.

•The produced TRO (HOBr / OBr -) oxidizes organic matter and acts as a fungicide.

•Depending on the concentration of the TRO in the water tank, it may have a deleterious effect on the fish or may further produce carcinogens.

•The algorithm for controlling the TRO should be based on sufficient actual operating values and experience and can be safely applied to fish only if sufficient technical skills are secured (TRO application is a global trend).

- O3 + Br  + H             HOBr + O2 -----------------------Rx 1

- 3HOBr + 2NH3          N2 + 3Br  + 3H  +3H2O--------Rx 2

- HOBr + NH3            NH2Br + H2O --------------------Rx 3

- HOBr + NH2Br          NHBr2 + H2O --------------------Rx 4

- HOBr + NHBr2          NBr3 + H2O ----------------------Rx 5

- 2H2O + NHBr2+NBr3 N2+3Br +3H +2HOBr-----------Rx 6







Ozone can be safely used if it has good maintenance and automatic control!

Name of sample

Original water (control)

Treated water

Emitted water (control)

Number of bacteria





Common bacterium

90 ~ 98% reduction



Emitted water (treated water)


80% less common bacteria

No tree caterpillars

Date of analysis : 2015. 06. 09~

​Analytical agency : Jeju Island Marine Fisheries Research Institute,

National Fisheries Research and Development Institute

How to treat seawater by electrolysis

※Electrolysis of organic matter

Electrolysis of the organic material is oxidized in the anode, but indirect oxidation by intermediate products such as hypochlorous acid produced by direct oxidation which oxidizes the organic matter and electrolysis of chlorine by adsorption of hydroxide ion by electrolysis of water on the electrode surface Can be distinguished.


① Direct oxidation

The organic material (R) reacts with hydroxide ions adsorbed on the oxidizing anode and decomposes into carbon dioxide, water or hydrogen ions.

R+MOх[OH‾]₂→CO₂+zH⁺+ze⁻+MOх (MOх : anode)


② Indirect oxidation

The electrochemical reaction of organic materials removed by indirect oxidation occurs simultaneously with the anodic oxidation of chlorine during electrolysis, and hypochlorous acid is formed on the electrode surface.

Organic substances in the water are reduced by hydrogen generated from the cathode, and oxidized pigments are easily reduced and become colorless.


※Example of electrolysis reaction


① Electrolysis of water

Anode : H₂O+H₂O→H₃O⁺+OH⁻+e

Cathode : 2H₂O+e→OH⁻+H₂O+H⁺


Total Reaction : H₂O→H⁺+OH⁻


② Electrolysis of chlorine

Anode : 2Cl⁻→Cl₂(dissolved)+2e⁻

Cathode : 2H₂O+2e⁻→2OH⁻+H₂

Between the electrodes : Cl₂+H₂O→HOCl+Cl⁻+H⁺


→ HOCl, OCl⁻has strong sterilization effect.

Sodium Hypochlorite Formation Scheme

NaCl       +       H₂O    +   2e

(sodium chloride)   (water)  (electron)

        NaOCl          +       H₂

(Sodium hypochlorite)   (Hydrogen)

Disinfection reaction scheme

        NaOCl       +       H₂O

(Sodium hypochlorite)   (Treated water)

     HOCl          +        Na        +       OH

(hypochlorous acid)   (Natrium ion)  (Hydroxide ion)

※ Please call us for quotation.

Water treatment is necessary depending on the situation.

Water treatment