电磁波加载回流污泥对A2O厌氧池功能的影响

基于电磁波加载污泥的生物效应和溶出效应，将A²O系统的回流污泥进行电磁波加载，以期从微生物群落结构变化角度考察其对系统中厌氧池功能的影响.结果表明，电磁波加载回流污泥后，污泥絮体分解，细胞破壁；回流污泥中C、N、P的溶出效应显著.与加载前对比，厌氧池中TP富集效果更明显，富集率由122.9%增至152.2%；TN、COD去除率分别由7.3%、58.8%上升为32.1%和65.4%.MiSeq焦磷酸测序分析表明，回流污泥经电磁波加载后，厌氧池微生物群落的丰度增加，但其微生物多样性降低.碳源得到补充，厌氧池中微生物的代谢活性明显提高，活菌数量增加.厌氧池中富集了Zoogloea、Tolumonas、Dechloromonas等菌属.

Effect on function of anaerobic tank in A2O system with electromagnetic wave loading on returned sludge

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.