By 2030, people will be eating a lot more meat and animal products. The World Health Organization predicts that the worldwide consumption of animal products will increase by 72% in the next 15 years. But most developing nations do not have the right climates or the proper infrastructure to produce so much meat, eggs, and dairy.
One way that farmers can get lots of bang for their buck in meat production is an AFO. AFO stands for Animal Feeding Operation. Farmers use AFOs to raise more animals in less time and for less money. They are facilities where animals are kept and raised in a confined place. An AFO deals with the animals and their food, manure, and urine all under one roof.
While AFO’s are very good at raising a lot of animals in a small space, they also have some problems. Having so many animals in a confined space raises a number of environmental, ethical, and health concerns.
The problem we’re going to focus on today is the large volume of animal waste produced by AFOs. Some of the technology that’s used to treat animal waste leaves a different mess behind: water filled with so many extra nutrients that it’s considered contaminated.
Patrick Sheridan, seen in this photo, is a graduate student in Agricultural and Biosystems Engineering at Michigan State University. Patrick built something called a photobioreactor that uses algae to clean the contaminated water, and turn those extra nutrients back into animal feed.