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Scientists in Serbia experiment with mealworms for the degradation of polystyrene

Scientists in Serbia experiment with mealworms for the degradation of polystyrene

Scientists in Serbia have been using mealworms to break down polystyrene.

Larisa Ilizin, principal researcher at the Institute for Biology in Belgrade, told reporters that scientists discovered mealworms could digest plastics including polystyrene which is used for packaging, insulation, and food containers.

The project, endorsed by both the UNDP and the United Nations agency for international Development, the Government, included polystyrene as a regular ingredient in the food that the larvae of yellow mealworm beetles, or Tenebrio Molitor, eat.

They eat anything and everything, but they need to be trained on how to eat plastic.

Ilijin said, "We have developed larvae which have been optimized to degrade plastic as efficiently as possible."

She said that the bacteria in their guts breaks down the plastic into water and carbon dioxide, and there was no evidence left in their faeces or innards of microplastic residue.

This work is based on similar research in the U.S.A. and Africa.

Serbia, which is hoping to join the EU in the near future, recycles less than 2% household waste and only 15% of its municipal waste. This is far below the EU target of 55%.

About 3,000 landfills are home to over 84% of all waste. These sites are often unregulated, and they contain plastic, cardboard and paper, as well as organic waste. It is seeking ways to meet EU standards for waste treatment.

Ilijin stated that "styrofoam decomposes in nature over 500 years... it would be a good way to solve the problem of plastic waste."

Belinda Animals, based in Belgrade, received several containers of mealworms from the institute. The institute is breeding the mealworms and hopes to attract other farms.

When breaking down one kilogram of Styrofoam larvae emit between 1 and 2 grams of CO2. Boris Vasiljev, owner of the company, said that if we incinerate (Styrofoam), it emits more than 4,000 times as much carbon dioxide.

If the commercial production of larvae reaches a large scale, he also envisions them being used for animal feed.

Ilijin stated that the use of mealworms for animal feed is in its infancy. Serbia has yet to adopt regulations allowing the sale and use of insect products. (Reporting and editing by Alison Williams; Aleksandar Vasovic)

(source: Reuters)