SDOX PREVENTS ALGAE BLOOMS
LAKE THUNDERBIRD, OKLAHOMA
Application: Lake Oxygenation
Engineer: TetraTech Inc.
Goals: Prevent Algae Blooms | Reduce Taste & Odor Complaints
Since 1965, Lake Thunderbird has served as a primary municipal water source for central Oklahoma, providing drinking water to Midwest City, Del City and Norman. To the area’s 180,000 residents, the 5,349-acre reservoir also acts as a scenic venue for boating, swimming and fishing. With the number of taste and odor complaints increasing in recent years however, the Oklahoma Water Quality Standards (OWQS) classified Lake Thunderbird as a Sensitive Water Supply and a Nutrient Limited Watershed, requiring the reservoir’s water quality to be continuously monitored. METHOD After researching possible solutions, Cleveland County officials elected to install BlueInGreen’s state-of-the-art SDOX technology. Rather than treating the entire lake, the SDOX system would inject dissolved oxygen exclusively into Lake Thunderbird’s hypolimnion, maintaining aerobic conditions and keeping nutrients grounded in the sediment.
LAKE OFFICIALS HAVE REPORTED STEADILY DECREASING CHLOROPHYLL LEVELS SINCE INSTALLING THE SDOX IN 2010.
According to data gathered by the Oklahoma Water Resources Board (OWRB), the majority of taste and odor complaints coincided with algae blooms which were attributed to high levels of available nutrients within Lake Thunderbird. By promoting an aerobic environment, the SDOX kept nutrients bound in the sediment while minimizing the amount of oxygen required for treatment. With an on-shore, turn-key technology, the SDOX system prevented excessive algae blooms, avoided fish kills and reduced chlorophyll-a levels. Even during the record-high phosphorous inflows of 2013, lake officials reported the lowest levels of chlorophyll-a observed since 2007. By the summer of 2014, the number of taste and odor complaints had fallen to single digits.
“DURING THE FIRST THREE YEARS OF SDOX OPERATION, IT HAS BEEN SUGGESTED THAT OXYGENATION SYSTEMS WILL DECREASE HYPOLIMNETIC OXYGEN DEMAND OVER TIME.”
- OKLAHOMA WATER RESOURCE BOARD
Since its installation in 2010, the SDOX has consistently improved water quality at a lower cost than other competing technologies, while simultaneously reducing taste and odor complaints. Though still surveyed by the OWRB today, Lake Thunderbird is projected to be lifted from state sanctions in the near future. Contact a BlueInGreen representative to find out how you can benefit from our water treatment solutions.