Meet The Worms That Eat Plastic

Posted: Sep 30 2015, 1:09am CDT | by , Updated: Sep 30 2015, 10:09pm CDT, in News | Latest Science News


Meet the Worms that Eat Plastic
Mealworms munch on Styrofoam, a hopeful sign that solutions to plastics pollution exist. Wei-Min Wu, a senior research engineer in the Department of Civil and Environmental Engineering, discovered the larvae can live on polystyrene. (Photo: Yu Yang)

Plastic-eating mealworms could be the solution to cleaning the planet from plastic waste, shows new research.

Researchers show that the mealworm can live on a plastic diet. The larvae form of the darkling beetle can eat styrofoam and other forms of polystyrene show two companion studies co-authored by Standford's Wei-Min Wu. 

"Our findings have opened a new door to solve the global plastic pollution problem," Wu said.

Wu's research shows that the first evidence that bacteria digest plastic inside an animal's gut. 

"There's a possibility of really important research coming out of bizarre places," said Craig Criddle, a professor of civil and environmental engineering who supervises plastics research by Wu and others at Stanford. "Sometimes, science surprises us. This is a shock."

The study shows that 100 mealworms ate between 34 and 39 milligrams of Styrofoam. This is about the weight of a small pill per day. The worms converted about half of the styrofoam into carbon dioxide, as they would with any food source.

Within 24 hours, they excreted the bulk of the remaining plastic as biodegraded fragments that look similar to tiny rabbit droppings. Mealworms fed a steady diet of styrofoam were as healthy as those eating a normal diet, Wu said, and their waste appeared to be safe to use as soil for crops.

There is the big problem of plastic floating in our oceans. The researchers plan to find a mealworm equivalent that lives in the oceans. This could help solve the gigantic plastic problem in the oceans. There is another project that tries to filter out the small plastic pieces

Co-authors of the papers, "Biodegradation and Mineralization of Polystyrene by Plastic-Eating Mealworms. 1. Chemical and Physical Characterization and Isotopic Tests" and "Biodegradation and Mineralization of Polystyrene by Plastic-Eating Mealworms. 2. Role of Gut Microorganisms," include Yu Yang, Jun Yang, Lei Jian, Yiling Song and Longcheng Gao of Beihang University, and Jiao Zhao and Ruifu Yang of BGI-Shenzhen.

The papers have been published in Environmental Science and Technology.

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<a href="/latest_stories/all/all/2" rel="author">Luigi Lugmayr</a>
Luigi Lugmayr () is the founding chief Editor of I4U News and brings over 15 years experience in the technology field to the ever evolving and exciting world of gadgets. He started I4U News back in 2000 and evolved it into vibrant technology magazine.
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