Fig. 7
Eco-Cycle describing the recycling of solid waste and sewage for food, water and energy production for sustainability of future cities. Adapted from [105]. Legend Advanced water treatment systems for clean water production and advanced systems for gasification of solid waste for energy generation could allow considerable amount of water and energy savings. These could be reused for domestic needs and urban farming for food production. Additionally required fertilizer for urban farming can also be produced from sewage with processes such as “Pearl Process”