Defeating in "Eco-Friendly" Toilets Can Get Virtual Currency

Defeating in "Eco-Friendly" Toilets Can Get Virtual Currency

A professor in South Korea designed an eco-friendly toilet that can be used for multi-purpose payments such as paying for coffee or buying bananas.

Cho Jae-weon, a professor of urban and environmental engineering at the Ulsan National Institute of Science and Technology (UNIST), has designed an eco-friendly toilet connected to a laboratory that uses sewage to produce biogas and manure.

Reported from Reuters, July 10, 2021, the toilet made by Cho Jae-weon is called Toilet BeeVi, a combination of the words bee (bee) and vision (vision.

The toilet uses a vacuum pump to carry feces to an underground tank, reducing water use. There, microorganisms break down waste into methane, which is a source of energy for buildings, powering gas stoves, hot water boilers, and solid oxide fuel cells.

"If we think outside the box, human waste has a valuable value to be used as energy and fertilizer. I have incorporated this value into the ecological circulation," said Cho.

The average person defecates about 500 grams a day, which can be converted into 50 liters of methane gas, the environmental engineer said. This gas can generate 0.5kWh of electricity or be used to propel a car for about 1.2 km.

Professor Cho has also designed a virtual currency called Ggool, which means honey in Korean. Everyone who uses an eco-friendly toilet gets 10 Ggool a day.

Students can use the currency to buy goods on campus, from freshly brewed coffee to instant noodles, fruit and books. Students can pick up the products they want at the store and scan the QR code to pay with Ggool.

"I only once thought that human excrement was dirty, but now it is a very precious treasure to me," said graduate student Heo Hui-jin at the Ggool market.

"I even talk about poop during mealtimes to think about buying any book I want," said the South Korean student of Professor Cho's eco-friendly toilet.