Enhancement of the complete autotrophic nitrogen removal over nitrite process in a modified single-stage subsurface vertical flow constructed wetland: Effect of saturated zone depth
Enhancement of the complete autotrophic nitrogen removal over nitrite process in a modified single-stage subsurface vertical flow constructed wetland: Effect of saturated zone depth
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改进的单级地下垂直流人工湿地中亚硝酸盐过程完全自养脱氮的增强：饱和区深度的影响
DOI：
10.1016/j.biortech.2017.02.100
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发表时间：
2017
影响因子：
11.4
通讯作者：
Qi Ran
中科院分区：
文献类型：
--
作者：
Huang Menglu;Wang Zhen;Qi Ran
研究了一种带饱和区的改进型单级潜流垂直流人工湿地(VSSF)对亚硝酸盐(CANON)的完全自养脱氮强化作用，并在4种不同饱和带深度(SZD)下研究了VSSF处理猪场消化废水的氮素转化途径。在整个实验过程中，SZD显著影响了VSSF中的氮素转化途径。当SZD为45 cm时，由于Anammox的显著增强，Canon过程在系统中得到了最有效的增强。相应地，VSSF对TN的去除效果最好[(76.74±77.30)%]，N2O排放通量最低[(3.50±0.22)mg·(m2·h)−1]。结果表明，CANON工艺的自养脱氮可以成为VSSF脱氮的主要途径，适宜的SZD有利于改善微环境。
This study was conducted to explore enhancement of the complete autotrophic nitrogen removal over nitrite (CANON) process in a modified single-stage subsurface vertical flow constructed wetland (VSSF) with saturated zone, and nitrogen transformation pathways in the VSSF treating digested swine wastewater were investigated at four different saturated zone depths (SZDs). SZD significantly affected nitrogen transformation pathways in the VSSF throughout the experiment. As the SZD was 45 cm, the CANON process was enhanced most effectively in the system owing to the notable enhancement of anammox. Correspondingly, the VSSF had the best TN removal performance [(76.74 ± 7.30)%] and lower N2O emission flux [(3.50 ± 0.22) mg·(m2·h)−1]. It could be concluded that autotrophic nitrogen removal via CANON process could become a primary route for nitrogen removal in the VSSF with optimized microenvironment that developed as a result of the appropriate SZD.