KINETICS OF BIOGAS GENERATION USING DOMESTIC WASTES AS FEEDSTOCK

Anaerobically, biogas was generated from decayed organic substances through fermentation induced by microbial activities in the bio - reactor. This study reports a pilot project on the kinetics of the biogas produced from fresh pumpkin straws. The study was based on time at constant temperature of 35 o C a nd pH of 7. The result showed that 0.8 cm 3 biogas yield was made within the first six days of the production. The yield continuously increased till the 19 th day with a maximum yield of 3.0 cm 3 but declined to a zero level on the 21 st day. Further recovery of the gas yield was achieved by diluting the acidic slurry of the slurry with 380 cm 3 of water. The yield increased from 3.0 cm 3 to 3.7cm 3 on the 22 nd and 23 rd day respectively and later decreased to 3.2 cm 3 and it then leveled at 3 cm 3 in the rest of the production period. The biogas production followed initial rate Pseudo second order reaction with an average specific rate constant of 0.3212 cm - 3 day - 1