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Dag Knudsen, who has a farm near Lake City, Minn., worked with wastewater treatment plants in Israel, Hong Kong, Australia, and other locations during his career. He is concerned that the waste produced by concentrated animal feeding operations CAFOs is excessive and is causing problems.
âIn Iowa, they have about 3 million people,â Knudsen said. âThey have a lot of concentrated feeding operations there, and the waste produced by their hog industry is 30 times the amount of waste produced by their people.â
He noted that human waste must always go to a wastewater treatment plant, but animal waste is allowed to be stored in lagoons.