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IJSTR >> Volume 8 - Issue 4, April 2019 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Development Of Enhanced Substrate From Fresh Elephant Grass For Biogas Production

[Full Text]



Mbachu, Victor M., Igboanugo, Anthony C., Alukwe, Uchechukwu J.



alkaline pre-treatment, Biogas Technology, Biomass Biodegradation, Methane Content, Renewable energy, System Optimization, alkaline pre-treatment



Cow dung, which is a by-product of grass-eating, digestion and excretion by cow, is often hard to find in some places. This situation has therefore created a yawning gap for the use of mechanical and biochemical processes to mimic grass-eating, digestion and excretion of dung as an alternative way to provide the needed sustainable feedstock for biogas production. This research seeks to convert efficiently grass; elephant grass (pennisetum purpureum) in particular, to biogas. The purpose of the research is to provide a sustainable alternative to cow dung. Elephant grass was obtained, crushed with pulverizer, pre-treated with native potash (as to enhance pH) and inoculated with predetermined quantity of liquid mixture of cow dung from already running digester. After a retention time of 3 to 4 days, copious quantity of biogas started forming. There were however other trials involving the use of: grass and native potash alone, inoculated grass alone, and raw grass only, none of which produced flammable gas, except CO2 only. Our results confirm that biogas of high methane content (64.3%) can be produced from elephant grass using the above stated method. It’s therefore also confirmed that grass-to- gas conversion is realizable.



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