Biogas recirculation technology: Effect on biogas purification, slurry characteristics, microbial activity and energy consumption

In the present study, effect of biogas recirculation on slurry characterization, microbial activity and biogas purification were studied. Two digester units, one for control treatment and another equipped with a gas compression system for recirculation treatment, were designed and constructed. Experimental results showed that the recirculation system could improve the mixing process with a little energy consumption. The slurry analysis during...