Journal article
Rapid start-up of a bioelectrochemical system under alkaline and saline conditions for efficient oxalate removal
Bioresource Technology, Vol.250, pp.317-327
2018
Abstract
This study examined a new approach for starting up a bioelectrochemical system (BES) for oxalate removal from an alkaline (pH > 12) and saline (NaCl 25 g/L) liquor. An oxalotrophic biofilm pre-grown aerobically onto granular graphite carriers was used directly as both the microbial inoculum and the BES anode. At anode potential of +200 mV (Ag/AgCl) the biofilm readily switched from using oxygen to graphite as sole electron acceptor for oxalate oxidation. BES performance was characterised at various hydraulic retention times (HRTs, 3–24 h), anode potentials (−600 to +200 mV vs. Ag/AgCl) and influent oxalate (25 mM) to acetate (0–30 mM) ratios. Maximum current density recorded was 363 A/m3 at 3 h HRT with a high coulombic efficiency (CE) of 70%. The biofilm could concurrently degrade acetate and oxalate (CE 80%) without apparent preference towards acetate. Pyro-sequencing analysis revealed that known oxalate degraders Oxalobacteraceae became abundant signifying their role in this novel bioprocess.
Details
- Title
- Rapid start-up of a bioelectrochemical system under alkaline and saline conditions for efficient oxalate removal
- Authors/Creators
- T.N. Weerasinghe Mohottige (Author/Creator)M.P. Ginige (Author/Creator)A.H. Kaksonen (Author/Creator)R. Sarukkalige (Author/Creator)K.Y. Cheng (Author/Creator)
- Publication Details
- Bioresource Technology, Vol.250, pp.317-327
- Publisher
- Elsevier BV
- Identifiers
- 991005544043107891
- Copyright
- © 2017 Elsevier Ltd.
- Murdoch Affiliation
- School of Engineering and Information Technology
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.83 Bioengineering
- 3.83.1487 Microbial Fuel Cell
- Web Of Science research areas
- Agricultural Engineering
- Biotechnology & Applied Microbiology
- Energy & Fuels
- ESI research areas
- Biology & Biochemistry