Effect on function of anaerobic tank in A2O system with electromagnetic wave loading on returned sludge
SANG Wen-jiao1, LI Dong1, FENG Yi-jie1, FENG Yang-yang2, ZHANG Wan-jun3, XU Qian3
1. School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China;
2. Anhui Urban Construction Design Institute Co. Ltd., Hefei 230051, China;
3. Central and Southern China Municipal Engineering Design & Research Institute Co. Ltd., Wuhan 430010, China
Based on the biological and dissolution effects of electromagnetic wave on sludge, returned sludge in A2O reactor was loaded by electromagnetic wave, and effect on the function of the anaerobic tank was investigated from the perspective of microbial community diversity. Sludge flocs were decomposed, and cell structure in returned sludge was destroyed owing to electromagnetic wave loading. The dissolution ratio of C, N and P was obvious. By contrast, the enrichment effect of TP in the anaerobic tank was significantly enhanced with the enrichment rate increased from 122.9% to 152.2%. The removal rates of TN and COD increased from 7.3% and 58.8% to 32.1% and 65.4%, respectively. MiSeq pyrosequencing showed that the abundance of microbial communities in the anaerobic tank increased, while the microbial diversity decreased. Carbon resource was supplemented due to the interaction of the biological and dissolution effects of electromagnetic wave on returned sludge. Consequently, the metabolic activity of microorganisms and the number of live bacteria in the anaerobic tank increased greatly. Zoogloea, Tolumonas, Dechloromonas and other bacterial genera were enriched in the anaerobic tank.
桑稳姣, 李栋, 冯逸捷, 丰洋洋, 张宛君, 徐茜. 电磁波加载回流污泥对A2O厌氧池功能的影响[J]. 中国环境科学, 2019, 39(7): 2796-2803.
SANG Wen-jiao, LI Dong, FENG Yi-jie, FENG Yang-yang, ZHANG Wan-jun, XU Qian. Effect on function of anaerobic tank in A2O system with electromagnetic wave loading on returned sludge. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(7): 2796-2803.
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