Abstract
The purpose of this study is to estimate the amount of energy produced from biogas at the faecal sludge treatment plant in the city of Sokodé. The methodological approach consisted in producing biogas by co-digestion of faecal sludge with the fermentable fractions of solid waste then in estimating the quantity of energy available from the produced biogas. Tests of co-digestion of faecal sludge and fermentable fractions of solid waste, showed that from 2258 tons/DM of biomass in one year, 44476 m3 of biogas, or 29177 m3 of methane could be produced. The methane content, which is 65.6 %, is a very interesting source of energy. Several techniques for producing energy from biogas exist, one of which is the production of electricity. In this study, it is a question of making the choice of an adequate electric motor which will allow to produce electric energy from the biogas on the faecal sludge treatment plant. Thus, it was necessary to estimate the quantity of energy available from the biogas produced. To do so, it was calculated the quantity of energy that can be produced by the biogas in one year, the quantity of recoverable energy produced in a year and the quantity of energy supplied by biogas in one hour. The results showed that by 2035, the co-digestion of fermentable solid waste and faecal sludge from the city of Sokodé, would produce 534,246 kWh. The recoverable part would be 507,534 kWh and the energy supplied is 58 kWh.
Highlights
Non-traditional biomass to be used to improve electricity production by biogas processes in Africa seems to be innovative whereas decentralized small-scale biogas units locally are used
The objective of this work is to estimate the amount of energy available from the biogas produced by the co-digestion of faecal sludge and fermentable fractions of solid waste
The objective of this work was to assess the amount of energy produced from the biogas obtained from the co-digestion of the fermentable fractions of solid waste and faecal sludge in the town of Sokodé
Summary
Non-traditional biomass to be used to improve electricity production by biogas processes in Africa seems to be innovative whereas decentralized small-scale biogas units locally are used. Biomass, which is the main source of energy, represents 76 % of final energy consumption, with mainly wood fuels, in particular fuelwood, charcoal and certain agricultural residues. In order to fill this vacuum which continues to widen further, the use of renewable energies has become essential [2]. In this context, the production of biogas from fermentable waste is an opportunity for the diversification of energy resources and sustainable management of the environment.
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