限氧条件下利用固体碳源增强人工湿地的氮去除。
Enhanced nitrogen removal using solid carbon source in constructed wetland with limited aeration.
机构信息
Department of Environmental Science, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, PR China.
Research Unit Comparative Microbiome Analysis, Helmholtz Zentrum München, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany.
出版信息
Bioresour Technol. 2018 Jan;248(Pt B):98-103. doi: 10.1016/j.biortech.2017.07.188. Epub 2017 Aug 4.
In this study, the performances of nitrogen removal in constructed wetlands using solid carbon source with limited aeration were investigated. The blends of poly-3-hydroxybutyrate-co-3-hydroxyvalerate (PHBV) and polyacetic acid (PLA) were used as the carbon source and biofilm support. The performances of nitrogen removal, microbial abundance and microbial community structure in the biofilm attached on PHBV/PLA were investigated. Higher ammonia removal efficiency (91.00%) and total nitrogen removal efficiency (97.03%) than non-aerated constructed wetland (System NA) were achieved in constructed wetland with limited aeration (System A). The limited aeration decreased the average concentrations of COD in effluent. And, System A had higher microbial abundance than System NA. Pyrosequencing analysis showed that denitrifying bacteria Brevinema (41.85%) and Thiothrix (12.33%) were the predominant genus in the biofilm attached on the carbon source in System NA and System A, respectively.
在这项研究中，研究了采用有限曝气的固体碳源的人工湿地在脱氮方面的性能。聚 3-羟基丁酸酯-共-3-羟基戊酸酯（PHBV）和聚乙酸（PLA）的混合物被用作碳源和生物膜载体。考察了附着在 PHBV/PLA 上的生物膜的脱氮性能、微生物丰度和微生物群落结构。与非曝气人工湿地（System NA）相比，有限曝气人工湿地（System A）的氨氮去除效率（91.00%）和总氮去除效率（97.03%）更高。有限曝气降低了出水中 COD 的平均浓度。并且，System A 的微生物丰度高于 System NA。焦磷酸测序分析表明，反硝化细菌 Brevinema（41.85%）和 Thiothrix（12.33%）分别是 System NA 和 System A 中生物膜附着在碳源上的主要属。
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