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Effects of ammonia fiber expansion (AFEX) treated corn stover on anaerobic microbes and corresponding digestion performance

Rojas-Sossa, Juan Pablo, Zhong, Yuan, Valenti, Francesca, Blackhurst, John, Marsh, Terence, Kirk, Dana, Fang, Di, Dale, Bruce, Liao, Wei
Biomass and bioenergy 2019 v.127 pp. 105263
Archaea, ammonia, anaerobic digestion, biogas, biomass, corn stover, feedstocks, fuel production, gas production (biological), lignocellulose, microbial communities, microorganisms
Dynamic changes in microbial communities and digestion performance of AFEX treated corn stover co-digestion were compared to untreated corn stover co-digestion. Even though it took longer to stabilize the AFEX treated corn stover co-digestion system than it did for the untreated corn stover co-digestion, the results show that AFEX treated corn stover is a good feedstock to enhance the archaea community and improve biogas production. In the stabilized digestion system, the AFEX treated corn stover co-digestion increased abundance of archaea community (11.8%) by approximately three times compared to the untreated corn stover co-digestion (4.3%), The corresponding biogas production (213 L/kg VS loading) of the AFEX treated corn stover co-digestion was 22% higher than that (175 L/kg VS loading) of the untreated corn stover co-digestion. AFEX treatment could enable more extensive use of lignocellulosic biomass for anaerobic digestion to generate biogas and thereby provide another route for lignocellulosic biofuel production.