Improved high solid anaerobic digestion of chicken manure by moderate in situ ammonia stripping and its relation to metabolic pathway

Biomethane Yield, Physicochemical Structures, and Microbial Community Characteristics of Corn Stover Pretreated by Urea Combined with Mild Temperature Hydrotherm

“…C. sensu stricto 1 and Terrisporobacter can use organic compounds of CS to produce methanogenesis precursors—such as acetic acid, butyrate, H 2 and CO 2 [ 47 , 48 ] —which are important intermediates for methanation. Fermentimonas can convert carbohydrates and cellulose to VFAs, H 2 and CO 2 Fermentimonas can transfer carbohydrate and cellulose to VFAs, H 2 , and CO 2 [ 49 ], which plays an important role in degrading and using carbohydrate-rich substrates. Compared to the untreated group, the enrichment of C. sensu stricto 1 , Fermentimonas and Terrisporobacter in all pretreated groups indicated that the activity of these genera was enhanced when urea was combined with hydrothermal pretreatment, which was conducive to following AD of CS.…”

“…Fermentimonas positively correlated with acetic acid, ethanol and methane yield. The domestication of Fermentimonas was related to the metabolism of various TVFAs, and the succession of Fermentimonas could be beneficial to improving biomethane production during the AD process [ 49 ].…”

Graphene Addition to Digestion of Thin Stillage Can Alleviate Acidic Shock and Improve Biomethane Production

“…Compared with the inoculum, the most significant increase in abundance in the control group was observed in the genus Fermentimonas, which rose from 0.2% to 10.8%, indicating its unique role during digestion of thin stillage (Figure A). Fermentimonas has been reported as the dominant genus in digesting numerous complex substrates and shown to be associated with the hydrolysis and acidogenesis of the AD process . Moreover, it can convert substrates containing polysaccharides and proteins to easy-degraded VFAs, which are the main substrates for methanogens .…”

“…Fermentimonas has been reported as the dominant genus in numerous complex substrates and shown to be associated with the hydrolysis and acidogenesis of the AD process. 43 Moreover, it can convert substrates containing polysaccharides and proteins to easy-degraded VFAs, which are the main substrates for methanogens. 44 This is supported by "in silico" analysis of the genome of the Fermentimonas caenicola strain which indicates that it contains a large number of genes encoding carbohydrate-active enzymes potentially involved in hydrolysis, and it has also been shown to be involved in propionic acid fermentation and to contain genes potentially encoding the acrylyl-CoA pathway.…”

“…47 Tepidanaerobacter has been revealed as the syntrophic acetate-oxidizing bacteria (SAOB) that generally cooperates with hydrogen-utilizing methanogens such as Methanosarcina. 43 Microbial groups belonging to family Lentimicrobiaceae are capable of the hydrolysis of complex polysaccharides such as food waste-recycling wastewater 48 and high-strength starch-based wastewater. 49 These findings suggest that new syntrophic relationships among the abovementioned bacterial genera and potential methanogens are likely to have been established to efficiently convert thin stillage to methane.…”