To date, over 1.7 billion people don’t have basic sanitation services, such as private toilets or communal latrines, and almost 500 million people still practice open defecation, 92% of whom live in rural areas. That’s why Archie Read, who recently graduated in product design engineering from London’s Brunel University, designed the toilet “Sandi” after an internship in Madagascar.

Sandi uses a mechanical flush which doesn’t require electricity, and a basic conveyor belt to move the solids away, which doesn’t require water. Furthermore, it has a divider inside the bowl that separates the waste streams so they can be used as fertilizers.

Sandi, at the moment, is just a concept with a prototype, but if he could get to the market, it could represent an optimal solution for rural families with no water, septic tanks, or sewage systems.