解析中试规模厌氧氨氧化颗粒污泥实现更好脱氮性能的机制。
Deciphering the mechanism of medium size anammox granular sludge driving better nitrogen removal performance.
机构信息
School of the Environmental Science and Engineering, Yangzhou University, Yangzhou 225000, PR China.
School of the Environmental Science and Engineering, Yangzhou University, Yangzhou 225000, PR China.
出版信息
Bioresour Technol. 2021 Sep;336:125317. doi: 10.1016/j.biortech.2021.125317. Epub 2021 May 21.
In this study, an integrated investigation to the microbial activities, extracellular polymeric substance (EPS), microbial community and function of anammox granular sludge (AnGS) was performed.Results showed that AnGS at 0.5-1.0 mm had the highest average specific anammox activity (SAA) of 345.9 mg NH-N·gVSS·d, but AnGS at 1.0-1.5 mm with higher SAA might lead to better nitrogen removal efficiency. The content of slime EPS and SAA achieved positively correlation with R of 98.11%, while protein/polysaccharide ratio of slime EPS and sludge volume index achieved negatively correlation with R of 99.13%. Cadidatus Broccadia and Denitratisoma were positive correlations and most abundant in AnGS 0.5-1.0 mm of 20% and AnGS 1.0-1.5 mm of 37%, respectively. AnGS at 0.5-1.0 mm exhibited higher energy metabolism which mostly contributed to produce protein. The study provides new insights into the mechanisms of AnGS about 1 mm playing more important role in nitrogen removal performance.
本研究对厌氧氨氧化颗粒污泥（AnGS）的微生物活性、胞外聚合物（EPS）、微生物群落和功能进行了综合研究。结果表明，0.5-1.0mm 的 AnGS 具有最高的平均比厌氧氨氧化活性（SAA），为 345.9mgNH-N·gVSS·d，但 SAA 较高的 1.0-1.5mm 的 AnGS 可能会导致更好的氮去除效率。污泥 EPS 的含量与 SAA 呈正相关，相关系数为 98.11%，而污泥 EPS 的蛋白质/多糖比与污泥体积指数呈负相关，相关系数为 99.13%。Candidatus Broccadia 和 Denitratisoma 呈正相关，分别在 0.5-1.0mm 的 AnGS 中占 20%，在 1.0-1.5mm 的 AnGS 中占 37%，最为丰富。0.5-1.0mm 的 AnGS 表现出更高的能量代谢水平，这主要有助于产生蛋白质。该研究为 1mm 左右的 AnGS 在氮去除性能中发挥更重要作用的机制提供了新的见解。
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