Examination of protein degradation in continuous flow, microbial electrolysis cells treating fermentation wastewater

Joo Youn Nam, Matthew D. Yates, Zehra Zaybak, Bruce Ernest Logan

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Cellulose fermentation wastewaters (FWWs) contain short chain volatile fatty acids and alcohols, but they also have high concentrations of proteins. Hydrogen gas production from FWW was examined using continuous flow microbial electrolysis cells (MECs), with a focus on fate of the protein. H2 production rates were 0.49±0.05m3/m3-d for the FWW, compared to 0.63±0.02m3/m3-d using a synthetic wastewater containing only acetate (applied potential of 0.9V). Total organic matter removal was 76±6% for the FWW, compared to 87±5% for acetate. The MEC effluent became relatively enriched in protein (69%) compared to that in the original FWW (19%). Protein was completely removed using higher applied voltages (1.0 or 1.2V), but current generation was erratic due to more positive anode potentials (-113±38mV, Eap=1.2V; -338±38mV, 1.0V; -0.426±4mV, 0.9V). Bacteria on the anodes with FWW were primarily Deltaproteobacteria, while Archaea were predominantly Methanobacterium.

Original languageEnglish (US)
Pages (from-to)182-186
Number of pages5
JournalBioresource technology
Volume171
Issue number1
DOIs
StatePublished - Nov 1 2014

Fingerprint

Regenerative fuel cells
Fermentation
fermentation
electrokinesis
Wastewater
Proteins
wastewater
Degradation
degradation
protein
acetate
Anodes
Acetates
Fatty Alcohols
Volatile fatty acids
Volatile Fatty Acids
erratic
gas production
Cellulose
Biological materials

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Environmental Engineering
  • Waste Management and Disposal

Cite this

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abstract = "Cellulose fermentation wastewaters (FWWs) contain short chain volatile fatty acids and alcohols, but they also have high concentrations of proteins. Hydrogen gas production from FWW was examined using continuous flow microbial electrolysis cells (MECs), with a focus on fate of the protein. H2 production rates were 0.49±0.05m3/m3-d for the FWW, compared to 0.63±0.02m3/m3-d using a synthetic wastewater containing only acetate (applied potential of 0.9V). Total organic matter removal was 76±6{\%} for the FWW, compared to 87±5{\%} for acetate. The MEC effluent became relatively enriched in protein (69{\%}) compared to that in the original FWW (19{\%}). Protein was completely removed using higher applied voltages (1.0 or 1.2V), but current generation was erratic due to more positive anode potentials (-113±38mV, Eap=1.2V; -338±38mV, 1.0V; -0.426±4mV, 0.9V). Bacteria on the anodes with FWW were primarily Deltaproteobacteria, while Archaea were predominantly Methanobacterium.",
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Examination of protein degradation in continuous flow, microbial electrolysis cells treating fermentation wastewater. / Nam, Joo Youn; Yates, Matthew D.; Zaybak, Zehra; Logan, Bruce Ernest.

In: Bioresource technology, Vol. 171, No. 1, 01.11.2014, p. 182-186.

Research output: Contribution to journalArticle

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