应用生态学报2017,Vol.28Issue(12):4075-4082,8.DOI:10.13287/j.1001-9332.201712.038
进水碳氮比对CANON型人工湿地脱氮性能的影响
Effect of influent C/N on nitrogen removal performance in tidal flow constructed wetland via CANON process
摘要
Abstract
This study was conducted to explore nitrogen transformation and associated microbial characteristics in a tidal flow constructed wetland (TFCW) with the complete autotrophic nitrogen removal over nitrite (CANON) process under influent COD/TN (C/N) constraints.The influent C/N increased from 0.0 to 10.0 via the addition of glucose in the influent as a source of organics.The results showed that influent C/N significantly affected nitrogen transformation rates in the TFCW throughout the experiment.As the influent C/N increased from 0.0 to 6.0,the absolute abundance of functional genes involved in denitrification could be enriched as a consequence of the addition of organics in influent,and then the simultaneous nitrification,anammox,and denitrification (SNAD) processes occurred in the TFCW,resulting in the enhancement of nitrogen removal in the system.However,as the influent C/N was more than 6.0,the activity of aerobic ammonia-oxidizing bacteria was inhibited and its quantity reduced,leading to the deterioration in nitrogen removal of the system.When the influent C/N was 6.0,the SNAD process was enhanced most effectively in the system owing to the development of multiple and complete nitrogen removal pathways in the TFCW.The TFCW respectively had the best TN removal efficiency and removal loading rate [(93.3 ±2.3) % and (149.30±8.00) mg · L-1 · d-1],indicating that the results had been than the maximal TN removal efficiency in a CANON process under ideal conditions.关键词
潮汐流人工湿地(TFCW)/碳氮比(C/N)/基于亚硝化的全程自养脱氮(CANON)/反硝化/厌氧氨氧化Key words
tidal flow constructed wetland (TFCW)/COD/TN (C/N)/completely autotrophic nitrogen removal over nitrite (CANON)/denitrification/anammox引用本文复制引用
黄梦露,李战朋,王振..进水碳氮比对CANON型人工湿地脱氮性能的影响[J].应用生态学报,2017,28(12):4075-4082,8.基金项目
本文由国家自然科学基金项目(51508002)、安徽省自然科学基金项目(1508085QE99)、安徽农业大学引进与稳定人才项目(YJ201520)和农田生态保育与污染防控安徽省重点实验室开放基金项目(FECPP201704)资助 This work was supported by the National Natural Science Foundation of China (51508002),the Natural Science Foundation of Anhui Province (1508085QE99),the Youth Fund Project of Anhui Agricultural University (YJ201520) and the Open Fund of Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention (FECPP201704). (51508002)