Bio-ethanol production from poultry manure at Bonga Poultry Farm in Ethiopia

Abstract

This study aimed to determine bio-ethanol potential of poultry manure. The manure was hydrolyzed by dilute H 2 SO 4 (0.2, 0.4, 0.6, 0.8 and 1 M) at temperature of 100 and 130°C for 30 min. Maximum glucose (115.6 g/l) was obtained from hydrolysis of 100 g poultry manure by 0.8 M H 2 SO 4 at 100°C for 30 min. The study shows that treatment of poultry manure releases more total reducing sugar using 0.8 M H 2 SO 4. Refractometry analysis of the fermented hydrolysate gave maximum ethanol concentration of 5% w/v with 0.8 M H 2 SO 4 and 4, 4, 3 and 2.5% of ethanol with 1, 0.6, 0.4 and 0.2 M H 2 SO 4 hydrolysis at 130°C for 30 min, respectively. Treatment with 0.8 M acid is an effective way that results to maximum yield and treatment with 0.2 M acid is the least effective. The optimum fermentation time is 24 h.

Analysis of Animal Bedding Heterogeneity for Potential Use in Biorefineries Based on Farmyard Manure

“…Despite its considerable potential, no attempt has yet been made to use animal bedding for biofuel production, on demonstration scale or commercial scale, although some research has been carried out on laboratory scale [8][9][10]. One possible reason for this is the heterogeneity of animal bedding, which complicates its use as a feedstock in biorefineries [11,12].…”

“…Feedstock variability leads to problems in a biorefinery, as a homogeneous feedstock is desirable. Studies on bioenergy production from manure are usually based on the average composition obtained from several samples [9,10,14], thus information is lacking on the variability in composition, and how this may affect energy production.…”

“…Some authors have proposed the use of animal bedding in an anaerobic digester to produce biogas, and subsequent processing of the digestate for ethanol or fertilizer production [10,18]. Others have proposed washing with water to separate the manure from the straw, so that the fibre can be hydrolysed separately without the risk of reducing sugars reacting with nitrous compounds [9,11,15]. However, no consensus has been reached on the best way to use animal bedding in a biorefinery.…”