Problem: League City, Texas, fights brutally hot weather for much of the year. One effect is thermal stratification in water storage tanks, which can lead to nitrification of drinking water and the loss of purification chemicals. The city needed a mixing solution.
Solution: The city installed a large-bubble mixing system from Pulsed Hydraulics in a 1.5-million-gallon elevated storage tank. The system uses compressed air to create beach-ball-sized bubble masses at the tank bottom. Those bubbles race to the top, dragging cold water with them. This keeps chemicals in the solution and prevents stratification. The system requires no moving parts inside the tanks. All in-tank components are stainless steel.
Result: After a successful test of the NSF-approved system, the city installed the mixing system in several of its water storage tanks. 800-641-1726; www.phiwater.com
