Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 621, Issue -, Pages 497-506Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2017.11.262
Keywords
Bioelectrochemical technology; Electrical stimulation; Industrial wastewater treatment; Simultaneous nitrification and denitrification; Bacterial composition
Categories
Funding
- National Natural Science Foundation of China [51378216, 41673090, 21577041, 21177042]
- Natural Science Foundation of Guangdong Province, China [2016A030311023]
- Fundamental Research Funds for the Central Universities, SCUT [2017ZD066]
Ask authors/readers for more resources
The use of several individual reactors for sequential removal of organic compounds and nitrogen, in addition to the required alkaline addition in aerobic reactors, remain outstanding technical challenges to the traditional biological treatment of cokingwastewater. Here, we report the utilization of a singlemicrobial fuel cell ( MFC) reactor that performs simultaneous carbonandnitrogen removalwith zero alkaline consumption, as evidenced by the results of the batch-fed and continuous-flow experiments. The MFC exhibited faster reaction kinetics for COD and total nitrogen ( TN) removal than the same configured reactor analogous to the traditional aerobic biological reactor ( ABR). At a hydraulic retention time ( HRT) of 125 h, the efficiencies of COD and TN removal in the MFC reached 83.8 +/- 3.6% and 97.9 +/- 2.1%, respectively, much higher than the values of 73.8 +/- 2.9% and 50.2 +/- 5.0% obtained in the ABR. Furthermore, the degradation in the MFC of the main organic components, including phenolic compounds ( such as phenol, 2-methylphenol, 3-methylphenol, 4-methylphenol, and 2,4-dimethlyphenol) and nitrogenous heterocyclic compounds ( such as quinolone, pyridine, indole, and isoquinolone) was greater than that in the ABR. The enhancing effect was attributed to the ability of the MFC to self-adjust the pH. It was also manifested by the increased abundances of heterotrophs, nitrifiers, and denitrifiers in the MFC. The correlations between the current density and the rates of COD and TN removal suggest that the extent of the current from the anode to the cathode is a critical parameter for the overall performance of MFCs in the treatment of coking wastewater. (C) 2017 Elsevier B. V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available