Biogas From Waste –to-Energy; Green Power and Clean Environment for Bole Lemi Industrial Zone
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Date
2017-02
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Addis Ababa University
Abstract
The current model for electricity generation and distribution in Ethiopia is dominated by
centralized power plants typically based on hydro power resource. Most of the substation in
the country are old and needs upgrading. The construction of high rise buildings and
industrial zones create an overloading on the existing substations, this problem can be solved
by constructing new substation, upgrading old ones and using distributed generation (DG)
systems. DG technologies often consist of modular and renewable-energy generators. By
connecting to local distribution networks, energy is produced and consumed closer to the
source of generation. This research is about using the waste to energy technology to generate
green power for BOLE LEMI INDUSTRIAL ZONE (BLIZ) and a clean environment for the
surrounding. A DG system is designed using biogas from the waste disposal pond KOTEBE
Sewage Treatment plant (KSTP) at a close proximity ,around 0.3km ,from the BLIZ and a
waste from wet room of the industrial shades as a renewable resource. It is discovered that a
total of 66.45MWh/day electrical energy can be generated from the two resources and using
only the resource from the KSTP a total of 36.057MWh/day electrical energy can be
generated. Two methods of connection of the DG system is studied, HOMER optimization
and RETscreen clean energy software are used to select the method of connection. And the
waste to energy DG system connected to the grid is found to be economically feasible with
LCOE $0.023/kWh .The DG system increases the reliability of the power system for the
Bole Lemi substation (BLSS) and as a result of the biogas generation the odor pollution will
be reduced and the environment for the surrounding will be clean.
Key words: Waste to Energy, Biogas, Distributed Generation, Industry zone, Grid
Connection, Odor Pollution
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Keywords
Waste to Energy, Biogas, Distributed Generation, Industry zone, Grid Connection, Odor Pollution