期刊
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
卷 125, 期 -, 页码 1-12出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ibiod.2017.08.004
关键词
Electric-coagulation multistage A/O membrane bioreactor (ECMMBR); Biodegradation; Dehydrogenase activity; Microbial communities; The high ammonia nitrogen and low C/N industrial wastewater; Low temperature
资金
- Major Science and Technology Program for Water Pollution Control and Treatment [2013ZX07202-010]
- Program for Liaoning representative office of the China Environment Protection Foundation [CEPF2014-123-1-1]
In the biological treatment of the industrial wastewater, low temperatures and low carbon nitrogen ratios (C/N) are great challenges. In this research, one conventional multistage A/O membrane bioreactor (MMBR) and one electric-coagulation multistage A/O membrane bioreactor (ECMMBR) were established to investigate the effect of Fe-C electrodes on the biodegradability of the activated sludge when treating the low C/N industrial wastewater. Results showed that the Fe electrode enhanced nitrogen transformation and the biodegradation of COD and volatile phenols. The dehydrogenase activity, the NH4+-N and NO2--N degradation rate of the unit sludge were higher in ECMMBR. Moreover, results from high throughput sequencing analysis revealed that ECMMBR may improve Chao and Shannon indices. ECMMBR improved the relative abundance of Luteimonas and Trueperaceae, which were cold-resistant and hydrocarbon-bearing microorganisms. This study demonstrated that the electric field and iron ions may improve the biodegradability of activated sludge, dehydrogenase activity and nitrogen transformation rate and enrich the richness and the diversity of communities in the activated sludge at low temperatures. The research provided a valuable technical method for the biodegradation of the low carbon and high ammonia industrial wastewater. (C) 2017 Elsevier Ltd. All rights reserved.
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