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Off Grid Energy Independence
Posted on April 05, 2018

Ethiopian energy plant converts trash to power

This news refers to something that could be off grid. Indeed grid extension in Africa is nowhere near to keeping up with population growth. See the IDTechEx report Off Grid Zero-emission Electricity 2018-2038: New Markets, New Technology Roadmap and hear the many appropriate presentations on this at Off Grid Energy Independence conference at the large, "IDTechEx Show!" Berlin April 11-12 with 30 masterclasses April 10 and 13.
A green energy plant that will convert waste into energy is being built in Ethiopia. The Reppie Waste to Energy facility-started full construction in Addis Ababa in September of 2014 and is near completion. The facility will process 1,400 tons of municipal waste per day and produce 185 GWHr of electricity annually that will be exported to the Ethiopian national grid. This will be sufficient to power 25% of Addis Ababa's households.
Development, design and construction of the project is conducted by a consortium comprising Cambridge Industries Ltd (CIL) and its partner China National Electric Engineering Co (CNEEC), on behalf of the employer, Ethiopian Electric Power Company (EEP). EEP is being advised by its owner's engineer, Ramboll of Denmark.
The waste-to-energy plant has been built near the country's largest dump, known as Koshe. Waste-to-energy uses trash as a fuel for power generation. Similar to other power plants (just using trash rather than other fuels like coal, oil, or natural gas), the fuel is burned in an environmentally sustainable manner, in a combustion chamber to heat tubes of water in boiler walls. The water is heated until it turns into steam, which is then used to drive a turbine generator that produces electricity.
Africa's waste stream, with its low calorific value and high moisture content, is very different to that found in more developed markets. CIL was created to design, construct and in some cases own extremely cost-competitive and scalable waste-to-energy facilities customised for Sub-Saharan Africa. The development of Reppie represents Phase I of a wider rollout program to develop multiple waste-to-energy plants across SSA's major cities.
The Facility will eliminate over 80% of the Municipal Waste delivered to it, whilst at the same time maximizing energy recovery in order to deliver much-needed renewable power to the surrounding City. The facility has a thermal capacity of 110MWth.
Source and top image: Cambridge Industries Ltd