Abstract
In this work, we have produced biogas by co-digestion of cow dung and slaughterhouse wastewater under different climate temperatures in two countries: N’Djamena in Chad, a country of Central Africa and Dakar in Senegal, a country of West Africa. In a first approach, we put the cow dung in cans of 1.5 L, hermetically closed. The goal was to know how long you could produce biogas. Then we built a bio-digester to produce biogas for cooking. Each bio-digester was exposed to receive solar heat that varied between 27°C to 41°C in Chad and between 24°C to 30°C in Senegal. Influenced by the high temperature and a minimum residence time, the experiments showed that the N’Djamena test produced biogas more quickly than the Dakar test which, on the contrary, had a low temperature and a long residence time. The production of biogas began at the end of seven days with flammability on the twenty-first day for the bio-digester in Chad and after twenty-seven days with a flammability on the thirty-sixth day for the bio-digester of Senegal. The different digestates were valorised in fertilizers, bricks and green coal. Our research aims to meet the living conditions of the rural world specifically for women by reducing their work and thus allowing them to have more time to self-educate and educate their children.
Highlights
Anaerobic digestion is a versatile biotechnology for converting organic waste into valuable biogas
One of the most profitable aspects of anaerobic digestion of manure allows both the production of bioenergy and the production of nutrient-rich soil amendment [1], because the presence of ammonia in the digestate is interesting for the production of ammonium sulphate, a fertilizer that promotes plant growth [2], reduction of greenhouse gas emissions and odor control [3] [4], it is consistent with agricultural practices [5] [6] and the environment as well as the adaptation to climate change of different crops that can feed a whole population but contribute significantly to the production of biomass very favorable to biogas [7] [8]
This anaerobic digestion must take place in an enclosure called anaerobic bioreactor or fermentor consisting of a closed tank, airtight and preferably thermally insulated from the outside, in which different bacterial species take turns to degrade the organic waste compounds, or effluents and produce biogas [9] [10], mainly composed of methane and carbon dioxide [11], while halving the level of organic matter represented by biodegradable by-products [12] [13]
Summary
Anaerobic digestion is a versatile biotechnology for converting organic waste into valuable biogas. One of the most profitable aspects of anaerobic digestion of manure allows both the production of bioenergy and the production of nutrient-rich soil amendment [1], because the presence of ammonia in the digestate is interesting for the production of ammonium sulphate, a fertilizer that promotes plant growth [2], reduction of greenhouse gas emissions and odor control [3] [4], it is consistent with agricultural practices [5] [6] and the environment as well as the adaptation to climate change of different crops that can feed a whole population but contribute significantly to the production of biomass very favorable to biogas [7] [8] This anaerobic digestion must take place in an enclosure called anaerobic bioreactor or fermentor consisting of a closed tank, airtight and preferably thermally insulated from the outside, in which different bacterial species take turns to degrade the organic waste compounds, or effluents and produce biogas [9] [10], mainly composed of methane and carbon dioxide [11], while halving the level of organic matter represented by biodegradable by-products [12] [13]. Our study focuses on the possibility of producing biogas under the influence of climate temperature in two regions of Africa with a completely different climate
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