Iowa Public Television


Enzyme Reduces Hog Manure Odor

posted on January 11, 2002

It's not the "smell of money" to everyone.

Biologists at a Canadian university have come up with a way to make hog waste less of a pollutant to the environment.

The researchers have figured out how to reduce phosphorous, in hog manure. Injecting a phosphorous-digesting enzyme from a bacterium into a pig's DNA ... causes the hogs to produce manure containing 75% less phosphorous.

Unlike other livestock, including cows and sheep, pigs lack the enzyme that breaks down phosphorus compounds in plant-based feed. As a result, the phosphorous-tainted waste leaches into the soil and into groundwater.

Tags: agriculture animals manure news pigs