Design of a Co-Digestion Biogas Plant to Curb Deforestation-Case Study of Phalombe Secondary School in Malawi
2021; Scientific Research Publishing; Volume: 08; Issue: 03 Linguagem: Inglês
10.4236/oalib.1107255
ISSN2333-9721
AutoresNyirenda Austin Kawelamzenje, Maurice Twizerimana, Dushengere Bernadette, Alexis Bakundukize,
Tópico(s)Energy and Environment Impacts
ResumoBiogas technology is one of the renewable technologies that use biodegradable waste such as human waste (HW), agricultural waste, animal and food waste.Over 90% of the population in Malawi is heavily reliant on firewood as their primary source of energy for cooking.This results in deforestation, pollution of the environment, and great monetary expenditure to buy firewood, more especially by boarding schools.A co-digestion biogas plant that uses human, animal, agriculture, and canteen food waste has been designed.This study design was based on the use of HW and canteen food wastes (CFW) as the substrate for the biodigester to produce methane (CH 4 ) gas that could be used for cooking and lighting at Phalombe Secondary School in Malawi to replace firewood.With a school population of 757 people, design calculations/stimations were performed to find out the amount of HW and CFW required per day.A field survey at the school was carried out to appreciate the problem the school is facing so that a solution could be found.Based on factors such as energy demand at the school, availability of feedstock, size of the digester, biogas yield, life span of the biodigester, and availability of construction materials, the type of biogas plant suitable for this purpose has been selected and designed.A computer-aided design (Auto CAD) software was used for the drawing.These design parameters were arrived at through a baseline survey, observation methods, and literature reviews.Through a questionnaire, a detailed energy demand analysis was carried out from whose results a fixed How to cite this paper:
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