UV Disinfection System Applied to Seawater Disinfection

The most effective way to disinfect water is to use a UV system for seawater disinfection with ultraviolet (UV) light, where 254 nm of UV deactivates the DNA of microorganisms.

We need to protect marine life from a whole range of diseases, including :

  • bacteria
  • mushrooms
  • virus
  • protozoa

If an infection occurs, the fish and other marine species could perish, and the aquarium would suffer considerable financial losses.

To protect marine life, seawater must be disinfected. The water should then be monitored to ensure that the following parameters remain stable:

  • chemical balance
  • pH
  • Temperature levels remain stable

In this way, we protect the lives, health and comfort of the ecosystem’s inhabitants.

If you want to equip yourself with an efficient activated carbon dechlorination system, the complete range of UV reactors for corrosive/salt water can be consulted online, and the sizing can be done on this page.

UV Disinfection Applied to UV Systems for Seawater Disinfection
UV Disinfection Applied to UV Systems for Seawater Disinfection

Disinfection system benefits

In addition to guaranteeing healthy water free of any risk of contamination by microorganisms, UV treatment of water is also part of an environmental approach:

  • In terms of health, the water treatment, without the addition of harmful pool products, guarantees swimming without the risk of allergies and respiratory diseases (non-chemical)
  • It is also of interest in terms of comfort by ensuring clear, crystal clear and odorless water.
  • The absence of chlorine makes for a safe, environmentally-friendly process.
  • UV treatment makes it possible to achieve real savings thanks to a long service life of the installations and simple, reliable, and long-lasting equipment.
  • Last but not least, the system can be installed and maintained quickly and easily.

Sizing advice: UV disinfection applied to seawater

On the page dedicated to UV reactors for corrosive/salt water, many solutions are offered (up to a unit flow rate of 130 m3/h). For higher flow rates, up to 130 m3/h, please contact us!

  • Select ” “
  • Select the source of water to be purified, e.g. “UV systems for seawater disinfection”.
  • Enter the flow rate to be treated (for example 25 m3/h)
  • Adjust the cost of electricity in your country (for example 0.09€ for France; 0.23€ for Germany)
  • Let 30 mJ / cm² (or adapt)
  • Specify the temperature of the water (normally, between 5 and 40°C is sufficient)
  • Please enter your email address so that we can send you the design right away.

In any case, to ensure optimal disinfection and decide if pre-filters are necessary, it is recommended to carry out an analysis of the water source with these parameters:

  • Iron
  • Hardness
  • Turbidity
  • Manganese
  • Suspended solids (TSS)
  • Transmittance UV

FAQ

Why is it essential to use specific materials for UV systems in seawater?

Seawater is highly corrosive due to its salt and mineral content. UV systems designed to treat seawater must therefore be manufactured with corrosion-resistant materials, such as high-density polyethylene (HDPE) or 316L stainless steel. This ensures the durability and efficiency of the system in demanding marine environments.

Turbidity, or the clarity of the water, influences the transmission of UV rays. Cloudier water reduces UV penetration, thus decreasing the effectiveness of disinfection. It is therefore crucial to pre-treat the water to reduce turbidity before UV disinfection, thus ensuring optimal inactivation of microorganisms.

UV disinfection offers several advantages:

  • Chemical-free : It does not introduce chemicals into the water, preventing the formation of potentially harmful by-products.

  • Fast effectiveness : it neutralizes microorganisms in a few seconds.

  • Respect for the environment : no chemical residues are released into the natural environment.

  • Ease of use : UV systems are easy to integrate and maintain.

These advantages make UV disinfection a preferred solution to guarantee health safety in the marine environment.

Regular maintenance is essential to ensure the effectiveness of a UV system:

  • Cleaning of quartz sheaths : The accumulation of deposits can reduce UV transmission.

  • Replacement of UV lamps : Lamps should be changed according to the manufacturer’s recommendations, usually after 8,000 to 10,000 hours of use.

  • Component Verification : Ensure the integrity of seals and corrosion-resistant materials.

Proper maintenance ensures optimal disinfection and extends the life of the system.

Yes, UV disinfection is particularly suitable for recirculation systems in marine aquaculture. It helps maintain optimal water quality by effectively eliminating pathogens, reducing the risk of disease and improving the health of aquatic organisms. In addition, it contributes to the stability of water parameters, which are essential for the well-being of farmed species.

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