BIOGAS PRODUCTION POTENTIAL OF PRE-TREATED FODDER RESIDUE
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Date
2017
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COLLEGE OF VETERINARY AND ANIMAL SCIENCES-MANNUTHY,THRISSUR
Abstract
The present study was undertaken to study the biogas production potential
of pre-treated fodder residue. The research work was conducted at University
Livestock Farm and Fodder Research and Development Scheme, Mannuthy using
portable floating drum biogas plants of 0.5 m3
capacity. The study was conducted
for 42 days, with daily loading rate of one kg cow dung and one kg chopped
fodder residue (T1), one kg cow dung mixed with one kg chopped fodder residue
soaked in water for seven days (T2), one kg cow dung and one kg chopped fodder
residue soaked in biogas slurry for seven days (T3), one kg cow dung mixed with
one kg chopped fodder residue soaked in one % NaOH for seven days (T4), and
all the treatments were further diluted to 10% dry matter level. Volume of gas was
taken throughout the entire observation period at constant pressure. Carbon
Nitrogen ratio of the substrate and Heat Generation potential of biogas were
analysed. The fertilizer value [Nitrogen (N), Phosphorus (P) and Potassium (K)
content of sludge were analysed fortnightly.
Results indicated that there exists significant difference between
treatments in case of volume of biogas production, carbon nitrogen ratio. The
mean values of biogas volume in m3 were in the order of group T4 at the highest
(0.096 ± 0.001) followed by T3 (0.078 ± 0.001), T2 (0.074±.001) and T1
(0.073±.0005). The mean value of Carbon Nitrogen ratio shows that T4
(26.41±0.23) had optimum C:N ratio than T3 (29.49±0.34), T2 (31.58±0.05) and
T1 (32.59±0.19). The sludge was observed to have better fertilizer value than the
substrate.
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