title: Performance and microbial community of carbon nanotube fixed-bed microbial fuel cell continuously fed with hydrothermal liquefied cornstalk biomass.
abstract: Hydrothermal liquefaction (HTL) is a green technology for biomass pretreatment with the omission of hazardous chemicals. This study reports a novel integration of HTL and carbon nanotubes (CNTs) fixed-bed microbial fuel cell (FBMFC) for continuous electricity generation from cornstalk biomass. Two FBMFCs in parallel achieved similar performance fed with cornstalk hydrolysate at different organic loading rates (OLRs) (0.82-8.16g/L/d). About 80% of Chemical oxygen demand (COD) and Total organic carbon (TOC) was removed from low-Biochemical oxygen demand (BOD)/COD (0.16) cornstalk hydrolysate at 8.16g/L/d, whereas a maximum power density (680mW/m(3)) was obtained at 2.41g/L/d, and a smallest internal resistance (Rin) (28Ω) at 3.01g/L/d. Illumina MiSeq sequencing reveals the diverse microbial structure induced by the complex composition of cornstalk hydrolysate. Distinguished from Proteobacteria, which a number of exoelectrogens belong to, the identified dominant genus Rhizobium in FBMFC was closely related to degradation of cellulosic biomass.
authors.affiliation: Laboratory of Environment-Enhancing Energy (E2E), and Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China. Electronic address: zdliu@cau.edu.cn.
authors.forename: Zhidan
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Laboratory of Environment-Enhancing Energy (E2E), and Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China.
authors.forename: Yanhong
authors.initials: Y
authors.lastname: He
authors.affiliation: Laboratory of Environment-Enhancing Energy (E2E), and Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China.
authors.forename: Ruixia
authors.initials: R
authors.lastname: Shen
authors.affiliation: Laboratory of Environment-Enhancing Energy (E2E), and Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China.
authors.forename: Zhangbing
authors.initials: Z
authors.lastname: Zhu
authors.affiliation: Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Xin-Hui
authors.initials: XH
authors.lastname: Xing
authors.affiliation: Laboratory of Environment-Enhancing Energy (E2E), and Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China.
authors.forename: Baoming
authors.initials: B
authors.lastname: Li
authors.affiliation: Laboratory of Environment-Enhancing Energy (E2E), and Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
authors.forename: Yuanhui
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D001674:Bioelectric Energy Sources; D057919:Biological Oxygen Demand Analysis; D018533:Biomass; D002482:Cellulose / Q000737:chemistry; D004573:Electrolytes; D006868:Hydrolysis; D008031:Lignin / Q000737:chemistry; D037742:Nanotubes, Carbon / Q000737:chemistry*; D011134:Polysaccharides / Q000737:chemistry; D020560:Proteobacteria / Q000235:genetics* / Q000378:metabolism; D014867:Water / Q000737:chemistry; D003313:Zea mays
chemical_list: D004573:Electrolytes; D037742:Nanotubes, Carbon; D011134:Polysaccharides; D014867:Water; C007916:hemicellulose; D002482:Cellulose; D008031:Lignin
keywords: Cornstalk; Hydrothermal liquefaction; Microbial community; Microbial fuel cell