No matter what you do as an operator, mother nature has a way of disregarding best-laid plans.
In the closing days of January, a historic cold front swept through the Midwest, causing problems for water and wastewater systems alike.
Take for example the case of an SBR plant in Renville, Minnesota, operated by PeopleService Inc. Part of the system is an 800-pound floating mixer rated to hold another 800 pounds.
It iced up so badly during the recent cold weather event that it actually sank into the aeration basin. That means approximately a half-ton of ice built up and
