title: Comparing activated carbon of different particle sizes on enhancing methane generation in upflow anaerobic digester.
abstract: Two sizes of conductive particles, i.e. 10-20 mesh granulated activated carbon (GAC) and 80-100 mesh powdered activated carbon (PAC) were added into lab-scale upflow anaerobic sludge blanket reactors, respectively, to testify their enhancement on the syntrophic metabolism of alcohols and volatile fatty acids (VFAs) in 95days operation. When OLR increased to more than 5.8gCOD/L/d, the differences between GAC/PAC supplemented reactors and the control reactor became more significant. The introduction of activated carbon could facilitate the enrichment of methanogens and accelerate the startup of methanogenesis, as indicated by enhanced methane yield and substrate degradation. High-throughput pyrosequencing analysis showed that syntrophic bacteria and Methanosarcina sp. with versatile metabolic capability increased in the tightly absorbed fraction on the PAC surface, leading to the promoted syntrophic associations. Thus PAC prevails over than GAC for methanogenic reactor with heavy load.
authors: Department of Environment & Low-Carbon Science, School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China. Electronic address: xusy@usst.edu.cn.
authors: Suyun
authors: S
authors: Xu
authors: Department of Environment & Low-Carbon Science, School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
authors: Chuanqiu
authors: C
authors: He
authors: Department of Environment & Low-Carbon Science, School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
authors: Liwen
authors: L
authors: Luo
authors: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
authors: Fan
authors: F
authors: Lü
authors: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
authors: Pinjing
authors: P
authors: He
authors: Department of Environment & Low-Carbon Science, School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
authors: Lifeng
authors: L
authors: Cui
mesh_terms: D000693:Anaerobiosis; D019149:Bioreactors; D002606:Charcoal / Q000737:chemistry*; D008697:Methane / Q000378:metabolism*; D010316:Particle Size
chemical_list: D002606:Charcoal; D008697:Methane
keywords: Activated carbon; Archaea; Methanogenesis; Syntrophic acetate oxidization; Volatile fatty acid