✍ Scribed by V.C. Kalia; A.P. Joshi
No coin nor oath required. For personal study only.
Waste pea-shells were digested under batch anaerobic conditions. Digestion of pea-shell slurries (PSS) at 1-5% total solids (TS) concentration, with H2-producing organisms yielded 99-362 l biogas-H/kg organic solids reduced (biogas-H: mixture of H2, C02 and H2S). Hydrogen constituted 33-46% of the total biogas-H. Methanogenesis of PSS (1-5% TS) was most effective at 1% TS level. During 25 days of incubation, 507 l biogas/kg was generated (biogas: mixture of CH4, C02 and H2S). Methane accounted for 43% of the total biogas yield. Biogas yield of 1% TS PSS without the fibrous sheath was only 16"5% of that of 1% TS PSS with the fibrous sheath. However, 3% TS PSS without the fibrous sheath showed improved results, which could be employed for continuous-culture digestions.
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