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Title: Performance evaluation of a continuous-flow bioanode microbial electrolysis cell fed with furanic and phenolic compounds

Abstract

Furanic and phenolic compounds, formed during the pretreatment of lignocellulosic biomass, are problematic byproducts in down-stream biofuel processes. A microbial electrolysis cell (MEC) is an alternative technology to handle furanic and phenolic compounds and produce renewable hydrogen (H 2). In this study, we evaluated the performance of a continuous-flow bioanode MEC fed with furanic and phenolic compounds at different operating conditions. All hydraulic retention times (HRTs) tested (6-24 h) resulted in complete transformation of the parent compounds at an organic loading rate (OLR) of 0.2g L -1 per d and applied voltage of 0.6 V. Increasing the OLR to 0.8 g L -1 per d at an HRT of 6h resulted in an increased H 2 production rate from 0.07 to 0.14 L L anode 1 per d, but an OLR of 3.2 g L -1 per d did not lead to a higher H 2 production rate. Significant methane production was observed at an OLR of 3.2 g L -1 per d. The lack of increased H 2 production at the highest OLR tested was due to a limited rate of exoelectrogenesis but not fermentation, evidenced by the accumulation of high acetate levels and higher growth of fermenters andmore » methanogens over exoelectrogens. Increasing applied voltage from 0.6 to 1.0V at an OLR of 3.2 g L -1 per d and HRT of 6h enhanced exoelectrogenesis and resulted in a 1.7-fold increase of H 2 production. Under all operating conditions, more than 90% of the biomass was biofilm-associated. Lastly, the present study provides new insights into the performance of continuous-flow bioelectrochemical systems fed with complex waste streams resulting from the pretreatment of lignocellulosic biomass.« less

Authors:
 [1];  [2];  [1]
  1. Georgia Inst. of Technology, Atlanta, GA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1271867
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
RSC Advances
Additional Journal Information:
Journal Volume: 6; Journal Issue: 70; Journal ID: ISSN 2046-2069
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; 59 BASIC BIOLOGICAL SCIENCES; Microbial electrolysis; bioelectrochemical systems; hydrogen

Citation Formats

Zeng, Xiaofei, Borole, Abhijeet P., and Pavlostathis, Spyros G. Performance evaluation of a continuous-flow bioanode microbial electrolysis cell fed with furanic and phenolic compounds. United States: N. p., 2016. Web. doi:10.1039/C6RA13735K.
Zeng, Xiaofei, Borole, Abhijeet P., & Pavlostathis, Spyros G. Performance evaluation of a continuous-flow bioanode microbial electrolysis cell fed with furanic and phenolic compounds. United States. doi:10.1039/C6RA13735K.
Zeng, Xiaofei, Borole, Abhijeet P., and Pavlostathis, Spyros G. Mon . "Performance evaluation of a continuous-flow bioanode microbial electrolysis cell fed with furanic and phenolic compounds". United States. doi:10.1039/C6RA13735K. https://www.osti.gov/servlets/purl/1271867.
@article{osti_1271867,
title = {Performance evaluation of a continuous-flow bioanode microbial electrolysis cell fed with furanic and phenolic compounds},
author = {Zeng, Xiaofei and Borole, Abhijeet P. and Pavlostathis, Spyros G.},
abstractNote = {Furanic and phenolic compounds, formed during the pretreatment of lignocellulosic biomass, are problematic byproducts in down-stream biofuel processes. A microbial electrolysis cell (MEC) is an alternative technology to handle furanic and phenolic compounds and produce renewable hydrogen (H2). In this study, we evaluated the performance of a continuous-flow bioanode MEC fed with furanic and phenolic compounds at different operating conditions. All hydraulic retention times (HRTs) tested (6-24 h) resulted in complete transformation of the parent compounds at an organic loading rate (OLR) of 0.2g L-1 per d and applied voltage of 0.6 V. Increasing the OLR to 0.8 g L-1 per d at an HRT of 6h resulted in an increased H2 production rate from 0.07 to 0.14 L Lanode 1 per d, but an OLR of 3.2 g L-1 per d did not lead to a higher H2 production rate. Significant methane production was observed at an OLR of 3.2 g L-1 per d. The lack of increased H2 production at the highest OLR tested was due to a limited rate of exoelectrogenesis but not fermentation, evidenced by the accumulation of high acetate levels and higher growth of fermenters and methanogens over exoelectrogens. Increasing applied voltage from 0.6 to 1.0V at an OLR of 3.2 g L-1 per d and HRT of 6h enhanced exoelectrogenesis and resulted in a 1.7-fold increase of H2 production. Under all operating conditions, more than 90% of the biomass was biofilm-associated. Lastly, the present study provides new insights into the performance of continuous-flow bioelectrochemical systems fed with complex waste streams resulting from the pretreatment of lignocellulosic biomass.},
doi = {10.1039/C6RA13735K},
journal = {RSC Advances},
number = 70,
volume = 6,
place = {United States},
year = {Mon Jul 04 00:00:00 EDT 2016},
month = {Mon Jul 04 00:00:00 EDT 2016}
}

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Cited by: 2 works
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Works referenced in this record:

Inhibition of ethanol-producing yeast and bacteria by degradation products produced during pre-treatment of biomass
journal, August 2004

  • Klinke, H. B.; Thomsen, A. B.; Ahring, B. K.
  • Applied Microbiology and Biotechnology, Vol. 66, Issue 1, p. 10-26
  • DOI: 10.1007/s00253-004-1642-2