By Trey Granger on Jun 24, 2009

Beetle Bacteria Can Break Down Styrofoam


The top prize at this year’s Intel International Science & Engineering Fair (ISEF) went to a 16-year-old from Taiwan who found a bacterium present in mealworm beetles that is capable of decomposing Expanded Polystyrene (EPS).

With the help of two microbiologists, the student, Tseng I-Ching, vivisected more than 500 beetles in her research. The unnamed bacteria is part of the mealworm digestive tract, although her project did not indicate how long it would take for the EPS to be broken down.

Ching stated that her main career objective is to become a microbiologist and "save the world." She spent the better part of her school year skipping classes in order to develop her innovative project isolating the "red bacteria" with the support of two leading microbiology scholars in Taipei. Photo: Flickr/shadowshador

Ching stated that her main career objective is to become a microbiologist and "save the world." She spent the better part of her school year skipping classes in order to develop her innovative project isolating the "red bacteria" with the support of two leading microbiology scholars in Taipei. Photo: Flickr/shadowshador

EPS includes the commonly-referenced Styrofoam, which is used frequently in packaging due to its light weight and ability to insulate. This form of plastic is an end product, meaning it can’t be recycled into different products and is instead shredded and converted into new EPS.

If Styrofoam is landfilled, it breaks apart into small pieces that become even more lightweight, allowing them to travel via air into the environment. In the U.S., more than 25 billion EPS cups are disposed of each year, in addition to what is used for packaging.

When asked about why she researched a way to break down Styrofoam, Ching said, “I love to observe and find wonder from nature. I love to solve questions.”

In other beetle news, separate research has concluded that the juice from beetles can be converted into a natural antifreeze. The juice can be mixed with oil or paint to provide frost resistance.

While artificially-produced antifreeze is recyclable, it also poses environmental issues because its sweet taste attracts children and animals. However, antifreeze also contains Ethylene glycol, which is toxic and poisonous when ingested.


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      • http://compostablegoods.com/blog.php Lynn

        I can’t help but wonder if the mealworm beetles can eat and digest very small pieces of EPS. Of course, one would need to analyze their excrement to find out, but there could be some potential for field settings (at least where this beetles in native).

      • http://www.dentalroseville.com Dentists Roseville

        Corn flea beetles transmit a bacteria that causes bacterial wilt (also known as Stewart’s wilt) of sweet corn. The bacteria is called Erwinia stewarti . The best cultural practice that can prevent wilt problems is to use resistant varieties when possible. This is more important for the early plantings, which typically sustain higher densities of corn flea beetles in sweet corn.

        The 1999 Commercial Vegetable Production Guide provides three abbreviations to help you determine how the variety responds to Stewart’s wilt. The abbreviations are: BWR – bacterial wilt resistant BWMS – bacterial wilt moderately susceptible BWS – bacterial wilt susceptible This notation is listed next to the cultivar. Also, the source of the seed may be able to tell you if the cultivar is resistant to Stewart’s wilt.