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Environ Sci Pollut Res Int. 2018 Nov;25(33):32844-32850. doi: 10.1007/s11356-017-8390-1. Epub 2017 Jan 20.

Bioelectrochemical anaerobic sewage treatment technology for Arctic communities.

Author information

1
National Research Council of Canada, 6100 Royalmount Ave, Montreal, QC, H4P 2R2, Canada. Boris.Tartakovsky@cnrc-nrc.gc.ca.
2
National Research Council of Canada, 12000 Montreal Rd, Ottawa, ON, K1A 0R6, Canada.
3
National Research Council of Canada, 6100 Royalmount Ave, Montreal, QC, H4P 2R2, Canada.

Abstract

This study describes a novel wastewater treatment technology suitable for small remote northern communities. The technology is based on an enhanced biodegradation of organic carbon through a combination of anaerobic methanogenic and microbial electrochemical (bioelectrochemical) degradation processes leading to biomethane production. The microbial electrochemical degradation is achieved in a membraneless flow-through bioanode-biocathode setup operating at an applied voltage below the water electrolysis threshold. Laboratory wastewater treatment tests conducted through a broad range of mesophilic and psychrophilic temperatures (5-23 °C) using synthetic wastewater showed a biochemical oxygen demand (BOD5) removal efficiency of 90-97% and an effluent BOD5 concentration as low as 7 mg L-1. An electricity consumption of 0.6 kWh kg-1 of chemical oxygen demand (COD) removed was observed. Low energy consumption coupled with enhanced methane production led to a net positive energy balance in the bioelectrochemical treatment system.

KEYWORDS:

Anaerobic; Bioelectrochemical; Microbial electrolysis cell; Psychrophilic; Wastewater

PMID:
28105595
DOI:
10.1007/s11356-017-8390-1
[Indexed for MEDLINE]

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