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Bahia Del Mar Lake Restoration Case Study

Bahia Del Mar is a 14 acre lake located in St. Petersburg, FL. In January, 2012, the Home Owners Association contacted a local lake management company to request assistance with multiple lake issues. They experienced foul odors, ongoing fish kills and recurring algae blooms. Together, these signs pointed to the need for a full lake restoration including aeration.

Testing showed the to be severely stratified, with high biological oxygen demand and very low oxygen levels. The lake of oxygen greatly increased organic material in bottom waters, leading to high nutrient levels and high concentrations of hydrogen sulfide causing a “rotten egg” odor.

Lake Restoration Using Aeration and Alum Together

The lake did not support fish and other aquatic organisms, and it posed a health risk to residents. To correct this, a two-pronged approach brought the lake back to a healthy state quickly.

Aquatic Aeration
According to a bathymetric map the total lake volume is far higher than their existing aeration could handle. With this in mind, two Vertex Aeration Systems, an LL 4XL5 Aeration System and a HF 4XL5 Aeration System with sound kits were installed in April, 2012 to provide effective turnover rates.

Alum application
Two treatments of Alum at a rate of 60ppm were applied to quickly improve water clarity and reduce water phosphorus levels.

Results:

The lake restoration was complete: Oxygen at bottom of the lake went from 0 mg/L to 8 mg/L


If Your Lake is Showing Symptoms of Low Qxygen, Get expert Help Now.

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