title: Methanogenesis from wastewater stimulated by addition of elemental manganese.
abstract: This study presents a novel procedure for accelerating methanogenesis from wastewater by adding elemental manganese into the anaerobic digestion system. The results indicated that elemental manganese effectively enhanced both the methane yield and the production rate. Compared to the control test without elemental manganese, the total methane yield and production rate with 4 g/L manganese addition increased 3.4-fold (from 0.89 ± 0.03 to 2.99 ± 0.37 M/gVSS within 120 h) and 4.4-fold (from 6.2 ± 0.1 to 27.2 ± 2.2 mM/gVSS/h), respectively. Besides, more acetate consumption and less propionate generation were observed during the methanogenesis with manganese. Further studies demonstrated that the elemental manganese served as electron donors for the methanogenesis from carbon dioxide, and the final proportion of methane in the total generated gas with 4 g/L manganese addition reached 96.9%, which was 2.1-fold than that of the control (46.6%).
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, P.R. China.
authors.forename: Sen
authors.initials: S
authors.lastname: Qiao
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, P.R. China.
authors.forename: Tian
authors.initials: T
authors.lastname: Tian
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, P.R. China.
authors.forename: Benyu
authors.initials: B
authors.lastname: Qi
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, P.R. China.
authors.forename: Jiti
authors.initials: J
authors.lastname: Zhou
mesh_terms: D019342:Acetic Acid / Q000378:metabolism*; D002245:Carbon Dioxide / Q000378:metabolism*; D008345:Manganese / Q000494:pharmacology*; D008697:Methane / Q000378:metabolism*; D062065:Wastewater / Q000382:microbiology*; D014871:Water Microbiology
chemical_list: D019342:Acetic Acid; D002245:Carbon Dioxide; D008345:Manganese; D008697:Methane; D062065:Wastewater