Performance and microbial community of carbon nanotube fixed-bed microbial fuel cell continuously fed with hydrothermal liquefied cornstalk biomass. (June 2015)

• Record Type: Journal Article
• Authors: Liu, Zhidan; He, Yanhong; Shen, Ruixia; Zhu, Zhangbing; Xing, Xin-Hui; Li, Baoming; Zhang, Yuanhui
• Is Part Of: Bioresource technology. Volume 185(2015)
• Page Start: 294
• Page End: 301
• Publication Date: 2015-06
• Subjects: Cornstalk -- Hydrothermal liquefaction -- Microbial fuel cell -- Microbial community; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2015.03.021
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: MFC was continuously fed with hydrothermal liquefied cornstalk biomass. 80% of COD and TOC was removed from cornstalk hydrolysate with low BOD/COD (0.16). Illumina MiSeq sequencing was used to analyze the microbial structure in MFC. Dominant bacteria was related to cellulose degradation, and was not Proteobacteria . 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) (0.82–8.16 g/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 8.16 g/L/d, whereas a maximum power density (680 mW/m 3 ) was obtained at 2.41 g/L/d, and a smallest internal resistance ( R in ) (28 Ω) at 3.01 g/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.