期刊
ENERGY
卷 88, 期 -, 页码 377-384出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2015.05.057
关键词
Microbial electrolysis cell; Wastewater treatment; Hydrogen production; Modified biocathode; Polyaniline/multi-walled carbon nanotubes
资金
- National Natural Science Foundation of China [21106072, 51172107]
- Research Fund for the Doctoral Program of Higher Education of China [20113221110004]
- Key Projects in the National Science & Technology Pillar Program of China [2012BAE01B03]
In this paper, we modified biocathodes with PANI (Polyaniline)/MWCNT (Multi-Walled Carbon Nanotube) composites to improve hydrogen production in single-chamber, membrane-free biocathode MECs. The results showed that the hydrogen production rates increased with an increase in applied voltage. At an applied voltage of 0.9 V, the modified biocathode MECs achieved a hydrogen production rate of 0.67m(3)m(-3)d(-1), current density of 205 Am-3, COD of 86.8%, coulombic efficiency of 72%, cathodic hydrogen recovery of 42%, and energy efficiency of 81% with respect to the electrical power input LSV (Linear Sweep Voltammetry) scans, SEM (Scanning Electron Microscopy) images and DGGE (Denaturing Gradient Gel Electrophoresis) demonstrated that hydrogen production is catalyzed by the special biofilm attached on a modified biocathode, and the microorganism species and quantity present were significantly different between the modified biocathode and the non-modified biocathode. In general, the performance of MECs with modified biocathodes was improved in the presence of a higher current density and hydrogen generation rate. (C) 2015 Elsevier Ltd. All rights reserved.
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