title: Comparative evaluation of biogas production from poultry droppings, cow dung and lemon grass.
abstract: The study explored the production of biogas from Lemon grass, Cow dung and Poultry droppings. The three substrates were pre-fermented according to standard methods. Six (6) kg of each pre-fermented substrate was mixed with water in ratio 1:1 v/v to form slurry and digested for 30days. A total of 0.125m(3), 0.191m(3) and 0.211m(3) of biogas were respectively produced from the Lemon grass, Cow dung and Poultry droppings with deviations of 0.00234m(3), 0.00289 m(3) and 0.00484 m(3) respectively. The cooking test carried out revealed that the scrubbed gas had higher cooking rates for water (0.12L/min, 0.085L/min and 0.079L/min for Lemon grass, Cow dung and Poultry droppings respectively) while the cooking rates for unscrubbed gas were 0.079L/min, 0.064L/min and 0.06L/min respectively. The pH of the medium fluctuated optimally between 6.5 and 7.8. The research demonstrated that Lemon grass produced less volume but better quality biogas compared to Cow dung and Poultry droppings.
authors.affiliation: Department of Water Resources & Environmental Engineering, Ahmadu Bello University, Zaria, Nigeria. Electronic address: meshilalfa@gmail.com.
authors.forename: I M
authors.initials: IM
authors.lastname: Alfa
authors.affiliation: Department of Biological Sciences, Landmark University, Omu-Aran, Nigeria. Electronic address: dahunsi_olatunde@yahoo.com.
authors.forename: S O
authors.initials: SO
authors.lastname: Dahunsi
authors.affiliation: School of Civil Engineering, University of Leeds, United Kingdom.
authors.forename: O T
authors.initials: OT
authors.lastname: Iorhemen
authors.affiliation: Department of Water Resources & Environmental Engineering, Ahmadu Bello University, Zaria, Nigeria.
authors.forename: C C
authors.initials: CC
authors.lastname: Okafor
authors.affiliation: Department of Agricultural Engineering, Ahmadu Bello University, Zaria, Nigeria.
authors.forename: S A
authors.initials: SA
authors.lastname: Ajayi
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D056804:Biofuels / Q000032:analysis*; D001709:Biotechnology / Q000295:instrumentation / Q000379:methods*; D002417:Cattle; D002645:Chickens; D031743:Cymbopogon / Q000737:chemistry*; D008372:Manure / Q000032:analysis*; D011200:Poultry; D013997:Time Factors
chemical_list: D056804:Biofuels; D008372:Manure
keywords: Anaerobic digestion; Biogas; Cooking rate; Lemon grass; Methane content