Officials in Slayton had three reasons to look at a new aeration system for the city’s wastewater treatment lagoons.
The first reason was the cost of electricity. The second was the expectation that phosphorus reduction might be added as a permit requirement. The third was the aeration effectiveness was sometimes hindered by weather.“The old aerators drew from a pipe in the lagoon and sprayed it back on the surface,” says Josh Malchow, city clerk/administrator in Slayton (population 2,000) in southwest Minnesota. “That’s what they are supposed to do, but they were not very effective.”If the wind was blowing at the pumps,
