摘要：This research work aims at evaluating the potential use of rice straw and organic fraction of market wastes to generate biogas and other anaerobic by-products using semi-dry fermentation system.A set of 1.5 L digesters were used to determine the biogas potential of the biomass in batch operation and a set of 10 L digesters were used to evaluate the effect of feeding mode during the semi-continuous digestion.In the case of rice straw,a maximum biogas production of 10 L/kgVS was achieved during 20 days of batch digestion at a controlled temperature of 32oC.For market waste,a maximum biogas production of 50 L/kgVS was obtained for the same period of digestion,which was 60% higher than that at ambient temperature.Digester fed on rice straw with 75% fresh feed replacement produced 42 L/kgVS,higher compared to the control digester as well as 50% fresh feed replacement.The digester run at 50% fresh feed addition showed higher rate of biogas generation in the early stage of fermentation and shorter lag phase because of its higher concentration of acclimated sludge.For the case of market waste,digester run with 75% fresh feed resulted in the biogas production of 40 L/kgVS,higher than that run on 50% fresh feed.However,both were lower compared to the control digester that produced 52 L/kgVS.The mode of feeding by replacing 75% digester volume with fresh rice straw led to more stable digester pH.The values of the kinetic parameters of biogas production for rice straw were Rmax: 1.37-2.07 (L/kg VS.day),A: 15.82-42.25 (L/kgVS),and λ: 0.4-2.0 days,while those for market waste were Rmax: 1.58-3.55 (L/kgVS.day),A: 31.09-51.84 (L/kgVS),and λ: 0.2-1.2 days.
其他摘要：Penelitian ini bertujuan untuk mengevaluasi potensi penggunaan jerami padi dan fraksi organik limbah pasar untuk menghasilkan biogas dan produk samping lainnya menggunakan sistem fermentasi semi-kering.Satu set digester 1,5 L digunakan untuk menentukan po
