CIRCULAR ECONOMY FOR URBAN WASTEWATER MANAGEMENT FOR ADDIS ABABA CITY

Abstract

In Addis Ababa city environmental pollution, water-borne disease, and some health problems have been caused by discharging wastewater or properly untreated wastewater to the environment. if wastewater is treated properly, it is a source rich in nutrients and productive for agriculture and also it can be a source for non-potable water sources for the city which reduces water stress. The Circular Economy (CE) is a sustainable development approach that focuses on waste management strategies such as reducing, reusing, recycling, and recovering. In Addis Ababa, an estimated 1,574 farmers are working on a total farm area of 68791.9ha throughout the catchment of Akaki river which is the main natural drainage of the city now it is highly polluted river by wastewater. And contributing up to 60 percent of the vegetable market for Addis Ababa. This research is aimed at the implementation of the circular economy for Addis Ababa city within three steps wastewater collection system, wastewater treatment, and keeping resources in use for agricultural, energy, and ground water recharge. According to this study, 59795.4m3/day of wastewater can be collected from one sub-city of Addis Ababa and the amount of BV from the wastewater generated from Megenagna sub-city will be equal to 358302.5 m3/day.and total of 993.4MWh/day of electrical energy and 957.1MWh/day of thermal energy can be generated by installing the proper technology.