Back to Search
Start Over
Efficient 2,4-dichloronitrobenzene removal in the coupled BES-UASB reactor: Effect of external voltage mode.
- Source :
-
Bioresource technology [Bioresour Technol] 2017 Oct; Vol. 241, pp. 879-886. Date of Electronic Publication: 2017 Jun 15. - Publication Year :
- 2017
-
Abstract
- In this study, bioelectrochemical-upflow anaerobic sludge blanket (BES-UASB) system was developed for treatment of 2,4-dichloronitrobenzen (DClNB) containing wastewater to investigate the effect of external voltage with different supplying modes. Results showed that 2,4-dichloroaniline (DClAN) was under detection limit in R1 (applied with intermittent voltage) and R2 (applied with continuous voltage) when the DClNB loading increased from 25 to 100gm <superscript>3</superscript> d <superscript>-1</superscript> (hydraulic retention time (HRT) was decreased from 24 to 6h) while sudden accumulation of DClAN (1.7mgL <superscript>-1</superscript> ) was observed in R0 (control). Dechlorination efficiency (DE) decreased to 32.7%, 45.0% and 45.3% in R0, R1 and R2 when HRT was further shortened to 4h. Microbial community analysis indicated the significant enrichment of dechlorination-related species in R1 and R2 compared with R0, e.g., Dehalobacter and Dehalococcoides. In summary, the BES-UASB system with intermittent voltage is an alternative process for efficient treatment of DClNB containing wastewater, and the energy input was reduced markedly.<br /> (Copyright © 2017 Elsevier Ltd. All rights reserved.)
- Subjects :
- Anaerobiosis
Sewage
Bioreactors
Nitrobenzenes
Waste Disposal, Fluid
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2976
- Volume :
- 241
- Database :
- MEDLINE
- Journal :
- Bioresource technology
- Publication Type :
- Academic Journal
- Accession number :
- 28629104
- Full Text :
- https://doi.org/10.1016/j.biortech.2017.06.010