Scientists at the University of Surrey have found a way to recycle waste from coffee production and generate electricity.

Waste water is generated during coffee production. They harm the ecosystem and pollute nature, so scientists decided to create a convenient way to clean up waste materials.

The problem of waste water from coffee production concerns, in particular, Colombia. It can be very difficult for farmers to install the industrial water treatment systems needed to process coffee waste in their factories, so this water flows into local waterways and pollutes them.

The authors of the new work came up with their own idea to solve this problem. They proposed using special bacteria to filter wastewater, which produce electricity as a by-product of their life.

According to the authors, bacteria may not completely filter out water. However, they allow much more of this valuable resource to be reused and reduced pollutants by about 30%.

Microorganisms also produce electricity, so a small business can save energy while running.

All equipment for such a process can be made from inexpensive materials, for example, using clay and ceramics for the membrane, as well as any wood for the frame.