Reduce algae to improve the water quality

Treated wastewater usually contains high levels of nutrients that can cause algal blooms on the water surface of storage ponds. An excess of algae can increase levels of pH, BOD and TSS, making reuse or discharge of the water difficult.

Control algae with LG Sonic ultrasound to have higher quality water that is safe to release back in the environment.

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Algae sample

Benefits of ultrasonic algae treatment

Lower chemical expenses

Improve operations of filters and pipes

Prevent toxic algal blooms

Wastewater pond

Algae growth in stabilization ponds

  • Comply with discharge standards for TSS, pH
  • Safe wastewater discharge
  • Algae can increase BOD levels

An important issue to consider in wastewater reuse and treatment is algae growth, which is relatively common in warm and nutrient-rich waters. Treated wastewater usually contains high levels of nutrients that can cause algae blooms on the water surface of storage ponds and clog irrigation systems (filters, emitters, distribution pipes).

Furthermore, some freshwater algae can form harmful algal blooms (HABs), and these specific species create health hazards for humans and animals by producing toxins and bioactive compounds that deteriorate the water quality.

Although there are several methods to treat wastewater, this article focuses on stabilization ponds (also called lagoons or waste stabilization ponds). These types of ponds and lagoons consist of in-ground earthen basins in which the waste is detained for a specified time (retention time) and then discharged.

The size and depths can vary, as well as the degree of treatment. Lagoons are typically classified by their degree of mixing and amount of oxygen dissolved in the water. Examples of lagoons are anaerobic lagoon, facultative lagoon, aerobic lagoon, partial-mix aerated lagoon, and completely mixed- aerated lagoon.


All-in-one solution for controlling algae in wastewater reservoirs.

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Read full case study
American Water
Seven years ago, American Water was the first customer to believe in LG Sonic’s technology. We’re proud of our ongoing, strong partnership.
Anglian Water
Anglian Water reduced up to 95% of algae counts with ultrasonic treatment. The Alton WTW supplies water to 92,214 properties in the Suffolk area, U.K.
CAASD’s Valdesia reservoir has a surface of 7km²/1700 acres. After years of algae bloom contamination, the utility achieved 87% chlorophyll a reduction.
Vallecitos Water District
Vallecitos Water District significantly improved TSS, pH, and DO levels. Vallecitos can now provide even higher quality water to their customers.
Three Rivers
A popular public open space with 2 lakes used for water skiing, fishing and sailing was contaminated with algae blooms.
American Crystal Sugar
American Crystal Sugar Company is the first company in the sugar beets industry to start using ultrasound technology to improve water quality.
Auckland Utility
NZ utility needed to reduce blue-green algae in a dam used for water supply. During summer, algae cause damage and increase the process costs.
Dubai Municipality
Dubai Municipality selected MPC-Buoy systems to control algae blooms because it's chemical-free and offers real-time water quality monitoring.
Town of Emmitsburg
The main objective was reducing algae during summer, as well as reducing chemicals costs, decreasing backwashes, and preventing clogged filters.

Frequently asked questions

  • What is the impact of LG Sonic ultrasound on zooplankton?

    Recent studies commissioned by the Dutch water board and conducted by research agency Ecofide have concluded that the LG Sonic ultrasound is safe for fish, plants, zooplankton, and other aquatic organisms.

  • Why control the algae if nutrients are the problem?

    Reducing nutrients is, of course, also necessary but difficult to achieve, even in the long-term. The majority of nutrient management methods are costly and require frequent dosing with unknown side-effects for the aquatic ecosystem. Besides, the duration and intensity of algal bloom events is strongly depended not only on nutrients but also on a combination of environmental factors, such as climate change, weather patterns, and an unbalanced ecosystem.

  • What kind of water does your ultrasound work in?

    The MPC-Buoy technology can be installed in freshwater, salt water, and brackish water.

  • What’s the largest water body that has LG Sonic implemented? Any issues linking many buoys?

    We have multiple projects with large numbers of MPC-Buoy units installed. For example, in Dominican Republic, 50 MPC-Buoys are in operation in a 7km2 reservoir. The buoys communicate with each other for optimal treatment.

  • What's the minimum depth of water required for LG Sonic treatment?

    We recommend a minimum water depth of 3 feet / 1 meter.