生态环境学报Issue(3)：480-486,7.DOI:10.16258/j.cnki.1674-5906.2015.03.017
潮汐流人工湿地基质硝化反硝化强度研究
Study on the Intensity of Matrix Nitrification and Denitrification in Tidal Flow Contructed Wetlands
摘要
Abstract
As a new type of constructed wetland ecosystem, tidal flow constructed wetland (TF-CW) has been widely cited in for the research field of nitrogen removal in recent years. By comparing the four different input water type TF-CWs, this study analyzes the relationship between nitrification intensity and NH4+-N removal rate, denitrification intensity and NO3--N effluent concentration. This research also explores the nitrification and denitrification intensity with depth change. Research results show that the different average NH4+-N removal rates were remarkable in four different TF-CWs, which were in accordance with that of nitrification intensity. The largest average nitrification intensity appeared on this TF-CW, idle time/response time was 2∶1, was 1.68±0.29 mg·kg-1·h-1. The average denitrification intensity otherness in four different TF-CWs was also outstanding (P=1.202×10-5). The denitrification intensity was largest in continuous flow constructed wetland, which was 2.99±1.58 mg·kg-1·h-1. Nitrification intensity of TF-CW matrix was significantly positive correlated with NH4+-N removal rate (r2=0.8497,P=4.285×10-14), while denitrification intensity and NO3--N effluent concentration showed a significantly negative correlation relationship (r2=0.8448,P=6.939×10-14). The nitrification intensity attained maximum where reaction depth ranges from 0 cm to 30 cm. With the increasing depth, the nitrification intensity change decreases on the other side. The maximum of denitrification intensity appeared on 30~60cm. This study constructs a theoretical basis for the design and improvement of removal effect of TF-CW. It argued that it is necessary to consider NH4+-N and NO3--N removal efficiency as a whole when design a TF-CW. The efficient nitrogen removal requires combined and reasonable configuration TF-CW and continuous flow constructed wetland.关键词
潮汐流/人工湿地/基质/硝化强度/反硝化强度Key words
tidal flow/constructed wetland/matrix/nitrification intensity/denitrification intensity分类
资源环境引用本文复制引用
张亚琼,崔丽娟,李伟,李凯..潮汐流人工湿地基质硝化反硝化强度研究[J].生态环境学报,2015,(3):480-486,7.基金项目
中央级公益性科研院所基本科研业务费专项(CAFYBB2014QA029)；中央级公益性科研院所基本科研业务费专项(CAFINT2013C13)；国家林业公益性行业科研专项(201404305) （CAFYBB2014QA029）
