Rapid start-up of a bioelectrochemical system under alkaline and saline conditions for efficient oxalate removal
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...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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Elsevier BV
2018
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| Online Access: | http://hdl.handle.net/20.500.11937/60265 |
| _version_ | 1848760592468279296 |
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| author | Weerasinghe Mohottige, T. Ginige, M. Kaksonen, A. Sarukkalige, Priyantha Ranjan Cheng, K. |
| author_facet | Weerasinghe Mohottige, T. Ginige, M. Kaksonen, A. Sarukkalige, Priyantha Ranjan Cheng, K. |
| author_sort | Weerasinghe Mohottige, T. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | 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/m 3 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. |
| first_indexed | 2025-11-14T10:18:14Z |
| format | Journal Article |
| id | curtin-20.500.11937-60265 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:18:14Z |
| publishDate | 2018 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-602652018-07-12T02:59:07Z Rapid start-up of a bioelectrochemical system under alkaline and saline conditions for efficient oxalate removal Weerasinghe Mohottige, T. Ginige, M. Kaksonen, A. Sarukkalige, Priyantha Ranjan Cheng, K. 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/m 3 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. 2018 Journal Article http://hdl.handle.net/20.500.11937/60265 10.1016/j.biortech.2017.11.009 Elsevier BV restricted |
| spellingShingle | Weerasinghe Mohottige, T. Ginige, M. Kaksonen, A. Sarukkalige, Priyantha Ranjan Cheng, K. Rapid start-up of a bioelectrochemical system under alkaline and saline conditions for efficient oxalate removal |
| title | Rapid start-up of a bioelectrochemical system under alkaline and saline conditions for efficient oxalate removal |
| title_full | Rapid start-up of a bioelectrochemical system under alkaline and saline conditions for efficient oxalate removal |
| title_fullStr | Rapid start-up of a bioelectrochemical system under alkaline and saline conditions for efficient oxalate removal |
| title_full_unstemmed | Rapid start-up of a bioelectrochemical system under alkaline and saline conditions for efficient oxalate removal |
| title_short | Rapid start-up of a bioelectrochemical system under alkaline and saline conditions for efficient oxalate removal |
| title_sort | rapid start-up of a bioelectrochemical system under alkaline and saline conditions for efficient oxalate removal |
| url | http://hdl.handle.net/20.500.11937/60265 |