Abstract
This paper proposes method for generation of electricity using human waste. The human waste was subjected to anaerobic digestion in the biodigester which was taken to be the septic tank with little modification to enhance biogas production and collection. Biogas produced and collected was subjected to treatment to remove CO<sub>2</sub> and H<sub>2</sub>S which were the major corrosive contaminants principally present in the raw biogas stream in order to prepare it as inlet gas for the gas turbine plant. Both single and combine cycle gas turbines were evaluated based on their capacities and electrical power output from unit volume of biomethane gas. FUTO NNDC Hostel with a capacity of 696 students was taken as case study. From the results, it was realised that a total biogas volume of 35 m<sup>3</sup> was produced daily from the NDDC hostel. This gave a total biomethane volume after treatment of 22.75 m<sup>3</sup>. When this biomethane volume was used for electricity generation, it produced an electrical power of 5.21 KW per day for combine cycle gas turbine and 3.22 KW per day for single cycle gas turbine. The results on power usage reveals that the power generated from the NDDC hostel per day will serve the electrical energy needs of 626 households using a daily electrical energy of 0.2kwh if CCGT was used for power generation, and a total of 387 households using the same energy needs of 0.2kWh if single cycle gas turbine were used for power generation.
Highlights
Nigeria, with all its natural gas reserve has not been able to generate enough electricity for its nearly 190 million heads of population
If 6 hostels of the same capacity as FUTO NDDC hostel is considered, the biogas produced from the human wastes in the six hostels per day will be 210 m3 which will give a biomethane volume of 136.5 m3. this will give an electrical power of 31.28 kW and 19.34 kW for the CCGT and single cycle gas turbine respectfully on daily basis
Biogenetic activities will act on it and when eventually the septic tank is opened for flow of biogas, the biogas volume that will be realized from the NDDC hostel is 1050 m3
Summary
With all its natural gas reserve has not been able to generate enough electricity for its nearly 190 million heads of population. Nigeria has barely reached a peak power generation of 5074MW in 2016 which represents roughly 26.7MW per million heads of population, a figure too low when compared to world acceptable average power needs of 1000 MW per million heads of population [2]. This low electric power generation has been blamed for decelerated growth in almost all sectors of the Nigeria economy. The input material here is the human waste. The human waste is fed into the digester This is first received in a primary pit or liquid storage tank from where it is transferred to the digested. A series of biological processes act on the materials to convert them to biogas through a process known as fermentation or anaerobic digestion
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