In her Master thesis “A Toilet Paper – Sustainable Sanitation Solutions for Municipalities”, KISD student Anastasia Bondar raises awareness of the potential to recover nutrients from digested food with the help of dry toilets and make them available again in the sense of a circular economy in agriculture. For this, she was awarded 1st place with the Cologne Design Prize. Moreover, she is developing dry toilets and a recycling system in cooperation with the city of Cologne.