Biogas potential assessment from a coffee husk: an option for solid waste management in Gidabo watershed of Ethiopia
2016
Ulsido, M.D., Wuhan Univ. of Technology, Wuhan, Hubei (China);Hawassa Univ. (Ethiopia) | Zeleke, G., Hawassa Univ. (Ethiopia) | Meng Li, Wuhan Univ. of Technology, Wuhan, Hubei (China)
The biogas and methane potential of a coffee husk at thermophilic and mesophilic conditions were examined. The tests were conducted using a laboratory bioreactors having a capacity of one liter, operated for about 40 days using a water bath thermostat at a temperature of 37 ± 2 ºC (mesophilic condition) and 52 ± 2 ºC (thermophilic condition). The biogas and methane production potentials of the two conditions were statistically different at α is less than 0.05. The mesophilic condition produced 241.31 ± 10.29 ml·gVSE-1 biogas and 131.67 ± 5.75 ml·gVSE-1 methane after 40 days as compared with a biogas of 239.7 ± 12.97 and methane of 124.63 ± 6.7 ml·gVSE-1 recovered after 20 days in the thermophilic condition; showing the former was better than the latter. The result prompted the viability of the coffee husk for biogas and methane production for better coffee solid waste management in Gidabo watershed of Ethiopia.
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