Odor Mitigation (Hypolimnetic)

Your Lake Odors May Be A Deeper Problem Than You Think

Dissolved oxygen (DO) is an essential component of water chemistry, required by most aquatic life for the oxidative breakdown of organic matter to gain energy for metabolic processes. Oxygen gets into a lake primarily by diffusion across the air-water interface, and by photosynthetic production from algae and submersed aquatic plants. DO depletion due to respiratory requirements of bacteria, algae, zooplankton, fish, etc. occurs throughout the water column, but is more concentrated in deeper, dark waters and bottom sediments where organic matter and detritus accumulate and DO inputs are minimal.  Algae that sink to the bottom deplete available dissolved oxygen (DO), enabling the formation of hydrogen sulfide (H2S) that produces a rotten egg odor when exposed to air. Thermal stratification during summer months, and under ice during the winter, allows H2S to accumulate in bottom waters that can create a significant odor event (and potential fish kill) with lake turnover in the fall and ice-out in the spring.

Hypolimnetic oxygenation keeps bottom waters sufficiently oxic so that H2S does not accumulate significantly in bottom waters.

The long-distance circulation provided by SolarBee® equipment moves water both horizontally and vertically. When the intake is set in deep water below the thermocline, it provides hypolimnetic oxygenation which is beneficial for fisheries and hydrogen sulfide accumulation reduction in anoxic bottom waters.

 

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