Complete bromate and nitrate reduction using hydrogen as the sole electron donor in a rotating biofilm-electrode reactor

Zhong, Yu, Li, Xin, Yang, Qi, Wang, Dongbo, Yao, Fubing, Li, Xiaoming, Zhao, Jianwei, Xu, Qiuxiang, Zhang, Chang and Zeng, Guangming (2016) Complete bromate and nitrate reduction using hydrogen as the sole electron donor in a rotating biofilm-electrode reactor. Journal of Hazardous Materials, 307 82-90. doi:10.1016/j.jhazmat.2015.12.053


Author Zhong, Yu
Li, Xin
Yang, Qi
Wang, Dongbo
Yao, Fubing
Li, Xiaoming
Zhao, Jianwei
Xu, Qiuxiang
Zhang, Chang
Zeng, Guangming
Title Complete bromate and nitrate reduction using hydrogen as the sole electron donor in a rotating biofilm-electrode reactor
Journal name Journal of Hazardous Materials   Check publisher's open access policy
ISSN 1873-3336
0304-3894
Publication date 2016-04-15
Sub-type Article (original research)
DOI 10.1016/j.jhazmat.2015.12.053
Open Access Status Not Open Access
Volume 307
Start page 82
End page 90
Total pages 9
Place of publication Amsterdam Netherlands
Publisher Elsevier
Collection year 2017
Language eng
Subject 2307 Health, Toxicology and Mutagenesis
2310 Pollution
2311 Waste Management and Disposal
2304 Environmental Chemistry
2305 Environmental Engineering
Formatted abstract
Simultaneous reduction of bromate and nitrate was investigated using a rotating biofilm-electrode reactor (RBER) with graphite carbon (GC) rods as anode and activated carbon fiber (ACF) bonded with steel ring as cathode. In RBER, the community of denitrifying bacteria immobilized on the cathode surface could completely utilize hydrogen (H2) as the electron donor, which was internally produced by the electrolysis of water. The short-term test confirmed that the RBER system could reduce 150–800 μg/L bromate to below 10 μg/L under autotrophic conditions. The reduced bromate was considered to be roughly equivalent to the amount of bromide in effluent, indicating that bromate was completely reduced to bromide without accumulation of by-products. The long-term test (over 120 days) showed that the removal fluxes of bromate and nitrate could be improved by increasing the electric current and decreasing the hydraulic retention time (HRT). But nitrite in effluent was significantly accumulated when the electric current was beyond 10 mA and the HRT was less than 6 h. The maximum bromate reduction rate estimated by the Monod equation was 109.12 μg/L h when the electric current was 10 mA and HRT was 12 h. It was proposed that the electron transfer process in RBER produced H2 on the surface of the ACF cathode, and the microbial cultures attached closely on the cathode which could completely utilize H2 as electron donors for reduction of bromate and nitrate.
Keyword Bromate
Electron donor
Hydrogen
Nitrate
Rotating biofilm-electrode reactor
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Advanced Water Management Centre Publications
 
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