Reduction of H(sub 2)S from biogas by using environmental air

摘要

First a general description is given about environmental aspects of producing biogas from manures, the anaerobic digestion process, and inhibition by ammonia. Two experiment were carried out to determine the effect of air on reducing H(sub 2)S from biogas. In both the experiments the same amount of degassed manure (1.5 lit) collected from Boddam Biogas Plant is initially used. Everyday feed the digester (3 lit of total volume) was fed by 500 ml of pig liquid manure, when the rate or Volatile Fatty Acid production in the experimental tanks goes down. First experiment was for trial and the biogas produced were measured only qualitatively. In this experiment 5% of air was used in the experimental tank. It was found that the biogas production was increased, though negligibly, in the experimental tank. In this experiment the amount of gas production was more in experimental tank, as well as, less H(sub 2)S concentration. The following biochemical parameters was measured of the manure used for biogas production. TS (Total Solid), VFA (Volatile Fatty Acid), Analysis of biogas. (LN) 30 refs.