Using a toilet can pay for your coffee, fruits and meals at a university and also being used to help power a building in South Korea.
An environmental engineering professor, Cho Jae-weon at the Ulsan National Institute of Science and Technology (UNIST) has designed an environment friendly toilet that connects to a laboratory which uses faeces to produce biogas and manure.
The BeeVi toilet is a portmanteau of the words bee and vision that uses a vacuum pump to send faeces into an underground tank and will also reduce the use of water. There all the micro organisms break down the waste into methane which further becomes a source of energy for the building, powering a gas stove, hot-water boiler and solid oxide fuel cell.
The environment engineer Cho Jae-weon said, “If we think out of the box, faeces has precious value to make energy and manure. I have put this value into ecological circulation."
Cho also added that an average person excretes about 500 grams a day which can be converted to 50 litres of methane gas which can generate 0.5 kWh of electricity.
Cho has also devised a virtual currency named as Ggool which means honey in Korean. Each person using the environment friendly toilet will earn 10 Ggool a day. Students can use this virtual currency to buy goods on campus. The students can also pick up their products at a shop and can pay with Ggool by scanning a QR code.