Cooling Ponds

    Control Algae with Ultrasound

    Treating algae in cooling ponds with ultrasound ensures that the pH levels of the discharge remain within NPDES permit limits.

      • Monitor and control algal blooms effectively
      • Comply with NPDES pH permit limitations
      • Reduce chemical dosage

    How ultrasound targets algae

    Reduce pH levels of the discharge

    Excessive algae growth in cooling ponds can be a significant cause for pH levels to exceed NPDES permissible limits.

    In electric power generation facilities, cooling ponds are used for storing heated water and supplying cooling water to the power plant. When discharging the cooling water, power plants need to comply with NPDES effluent requirements. pH levels need to be maintained within the range of 6.0 to 9.0 SU.

    Cooling pond of a power plant

    Causes of elevated pH

    Elevated pH levels can be caused by a various range of mechanisms such as algal growth, high nutrient levels of the source water, and chemicals used in cooling operations in the power plant. Excessive algal growth causes pH levels to increase through photosynthesis, in which carbon dioxide is rapidly extracted from the water Source water with high salt content entering the cooling pond can provoke e an increase of pH levels. Nutrient-rich water can indirectly influence pH levels too, by accelerating algal growth. Within cooling operations often chemicals are being used. Although these do not always influence the pH levels directly, they can contain high amounts of phosphorus which facilitates algae growth.

    pH lowering solutions

    Current methods for lowering pH levels include adding sulfuric acid to the cooling water. This treatment method is an expensive process which not always delivers the desired results. Another method is controlling algal growth in the cooling pond with chemicals such as algaecides. Besides being expensive, algaecides could potentially have negative effects on the operations of the powerplant. Controlling algal growth with MPC-Buoy is proven to be a safe and cost-effective solution to control algae. This chemical-free technology has been successful in controlling algal blooms in drinking water reservoirs, lakes, cooling towers and cooling ponds.

    Which Product do I need?

    Depending on the length of the water surface we offer different variations of our products. Please contact us for a solution that fits your specific needs.

    LG Sonic MPC-Buoy

    Control and Monitor Algae with the MPC-Buoy

    Complete algae control solution by using ultrasound

      • Sensor package to provide real-time water quality data
      • Control algae in lakes, dams and water reservoirs
      • Treatment range of 500m/1600ft in diameter
    More information

    Comply with NPDES pH permit limitations

    LG Sonic is running MPC-Buoy projects in more than 20 countries worldwide

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    We offer Worldwide Delivery

    For more information about the LG Sonic products, a quotation or a free installation advice please contact us. When possible, we will forward your request to a local distributor.


    Contact information

    • LG Sonic B.V.
    • Heliumstraat 7
    • 2718 SL Zoetermeer
    • The Netherlands