Each year across North America, warmer summer weather triggers the growth of algae in surface water bodies. In some cases, algae blooms are also caused by inadequate management of wastewater discharges. A striking example of this issue can be seen in Lake Erie, where recurring HABS (Harmful Algae Blooms) have become a significant concern.
Understanding Algae Growth
Algae thrive under specific conditions, including sufficient nutrients (such as nitrogen and phosphorus), optimal light levels, favorable pH, and warm temperatures. When phosphorus levels in a water body rise, algae growth tends to increase proportionally. This excess algae contributes to the production of dead organic matter, which can lead to anoxic (oxygen-deprived) conditions.
Anoxic water environments can cause significant ecological harm. Deprived of oxygen, aquatic ecosystems deteriorate as fish and plant life die and decay, resulting in septic conditions and unpleasant odors.
Tackling Algae Outbreaks
Addressing algae blooms requires a two-pronged approach:
Prevent Nutrient Overload The most effective long-term solution is to reduce phosphorus levels in agricultural runoff, which is the primary source of nutrient pollution. Preventing excessive nutrient input is essential to stopping algae growth at its source.
Remove Existing Algae Blooms While chemical additives can suppress algae growth, they do not physically eliminate the dense mats of algae from the water. For effective treatment, the algae must be removed along with the excess phosphorus that supports its growth.
Dissolved Air Flotation (DAF): A Targeted Solution
One of the most efficient methods for algae removal is Dissolved Air Flotation (DAF), combined with phosphorus precipitation. The DAF process physically separates algae and suspended solids from the water, clarifying it and reducing phosphorus concentrations simultaneously.
How DAF Works:
Clarification: The DAF system introduces microbubbles into the water, which attach to algae and other suspended particles. This causes the solids to float to the surface, where they are skimmed off.
Phosphorus Precipitation: Adding a coagulant or precipitant binds soluble phosphorus into a solid form, which can then be removed during the flotation process.
This dual-action approach effectively halts algae blooms and restores water quality.
Proven Success
DAF systems have been successfully deployed to manage algae outbreaks in various surface water bodies. This reliable and efficient technology not only removes visible algae mats but also addresses the underlying cause—phosphorus pollution.
Conclusion
Managing algae blooms requires both proactive nutrient management and effective removal strategies. Dissolved Air Flotation offers a proven, practical solution for tackling algae outbreaks while improving water quality and reducing ecological harm. By combining DAF technology with phosphorus reduction efforts, we can restore balance to aquatic ecosystems and prevent future outbreaks.
For more information on algae removal and DAF systems, contact our team to learn how we can support your water treatment needs.
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