Abstract
This study investigated microbial electrolysis of two aqueous phase waste products derived from guayule and willow generated from Tail Gas Recycle Pyrolysis (TGRP). The highest average current density achieved was 5.0 ± 0.7 A/m2 and 1.8 ± 0.2 A/m2 for willow and guayule respectively. Average hydrogen productivity was 5.0 ± 1.0 L/L-day from willow and 1.5 ± 0.2 L/L-day for guayule. Willow also generated higher coulombic efficiency, anode conversion efficiency, and hydrogen recovery than guayule at most organic loading conditions. Compounds investigated exceeded 80% degradation, which included organic acids, sugar derivatives, and phenolics. Mass spectrometric analysis demonstrated the accumulation of a long chain amine not present in either substrate before treatment, and the persistence of several peptide residues resulting from the TGRP process. New biorefineries may one day capitalize on this otherwise discarded byproduct of TGRP, further improving the potential applications and value of microbial electrolysis towards energy production.
| Original language | English |
|---|---|
| Pages (from-to) | 302-312 |
| Number of pages | 11 |
| Journal | Bioresource Technology |
| Volume | 274 |
| DOIs | |
| State | Published - Feb 2019 |
Funding
This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy (DOE). This article is based upon work supported by the Bioenergy Technologies Office (BETO) within the DOE Office of Energy Efficiency and Renewable Energy (EERE) under the Carbon, Hydrogen and Separations Efficiency for Bio-oil Pathways (CHASE) program. Funding from the Oak Ridge National Laboratory Seed Money Program is also acknowledged. SJS was partially supported by the Bredesen Center for Interdisciplinary Research and Education and the Methane Center at the University of Tennessee , Knoxville. The authors would like to thank Charles Mullen from USDA-ERRC for guidance on the TGRP process. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy (DOE). This article is based upon work supported by the Bioenergy Technologies Office (BETO) within the DOE Office of Energy Efficiency and Renewable Energy (EERE) under the Carbon, Hydrogen and Separations Efficiency for Bio-oil Pathways (CHASE) program. Funding from the Oak Ridge National Laboratory Seed Money Program is also acknowledged. SJS was partially supported by the Bredesen Center for Interdisciplinary Research and Education and the Methane Center at the University of Tennessee, Knoxville. The authors would like to thank Charles Mullen from USDA-ERRC for guidance on the TGRP process. Notice of Copyright: This manuscript has been co-authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).
Keywords
- Bioelectrochemical hydrogen production
- Biomass energy
- Organic conversion
- Pyrolysis aqueous phase
- Renewable energy