Problem: Hollandia Dairy, one of California’s oldest independent dairies had a buildup of odorous septic sludge in a 35,000-gallon bolted steel equalization tank. Several times, the tank had to be drained, a time-consuming process. The side-entry mixer could not mix the tank sufficiently.

Solution: A Landia AirJet including the chopper pump was installed to recirculate the foul air from the top of the tank down through the wastewater, scrubbing out the sulfur to eliminate odor issues. The AirJet is a compact, self-priming propeller aerator. The air, and thus oxygen, is automatically sucked down through a hose; a rotating propeller releases it as bubbles. It combines mixing and aeration to keep effluent fresh, providing additional aeration at peak loads. 

Result: There are no more foul odors. The operators do not have to add chemicals to the tank, and there is also no need for energy-intensive blowers. With reduced pH, the tank contents no longer go septic.

919-466-0603; www.landiainc.com