Feasibility study of biogas energy generation from refuse dump in a community-based distribution in Nigeria

摘要：

　　In this survey,three different wastes generated were combined in a locally fabricated digester and each singly loaded in respective digesters to generate energy in the form of biogas with an anticipation of redistribution for a community-based use.The biodegradability test of the substrates were studied ab initio by evaluating for ash and moisture contents,C/N ratio,biochemical oxygen demand and chemical oxygen demand for maize chaff,watermelon and cassava peels.The results showed 2.85,0.66 and 2.40%for ash content,11.18,93.22 and 70.26%for moisture content,12.10,15.10 and 19.10%for C/N ratio,155.07,131.96 and 113.79 ppm for BOD,and 240.00,212.00 and 264.00 ppm for the substrates respectively.From the results,maize chaff with the highest ash content,has the least bio-degradable(organic)matter,while watermelon,with the least ash content,has the highest biodegradable matter.The moisture content results for maize chaff and water melon were below and above the optimum value of 60-80%and this confirmed the low biogas volume produced when used alone.The ideal C/N ratio for anaerobic digestion is between 20∶1 and 30∶1.A comparison of these sets of values from the study showed that the C/N ratios obtained from the research work are below the optimum values of the C/N ratios and could be responsible for the poor biogas yield for the disjoined substrates.The biogas volume of 2100 mL was produced at the end of the retention time for the combined substrates and,was higher compared with the 18,25 and 29 milliliters(mL)produced for maize chaff,watermelon and cassava peels,(the disjoined)substrates respectively.In this study,the COD value for each substrate is higher than the corresponding BOD values.Hence,co-digestion of unavoidable food wastes is economic and,a potentially viable option to generate alternative renewable energy for rural community-based use.

关键词： Energy generation wastes biogas biodegradability and rural community

作者: Ogbene G.IGBUM Sunday ADOGA Andrew C.ELOKA-EBOKA Ekani OTIKWU

作者单位: Department of Chemistry,Benue State University,Makurdi,Nigeria Discipline of Mechanical Engineering,University of KwaZulu-Natal,Durban,South Africa

会议类型: 国际会议

会议名称: The 17th International Conference on Sustainable Energy Technologies(SET2018)(第17届可持续能源技术国际会议暨2018世界著名科学家来鄂讲学武汉论坛)

会议地点: 武汉

会议语种:英文

页码: 57-63

在线出版日期: 2018-08-21（万方平台首次上网日期，不代表论文的发表时间）