Nitrogen Removal Capacity in Horizon Subsurface Flow and Vertical Flow Constructed Wetland in Relation to Operational Mode

Abstract:

Two laboratory scale constructed wetlands were designed as horizon subsurface flow constructed wetland (HFCW) and vertical flow constructed wetland (VFCW) and were utilized to study the treatment capacity to reduce nitrogen. According to different inflow concentration and height of water surface, HFCW was analyzed in two operational modes and VFCW in four operational modes. The semi-submerged VFCW had the best capacity to remove nitrogen and the total nitrogen removal rate reached to 92% and the removal rate of HFCW was 90%. Moreover, the un-submerged VFCW could reduce 93% ammonia but nitrate removal rate just was 9%. And the removal rates of NH₄⁺-N, NO₃^--N and TN respectively were 85%, 80% and 81% in submerged VFCW.

• Periodical: Advanced Materials Research (Volumes 374-377)
• Pages: 118-121
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.374-377.118
• Online since: October 2011
• Authors: Tian Xie, Zong Lian She, En Shi, Lei Lei Li, Ying Jie Zhu
• Keywords: Horizontal Subsurface Flow Constructed Wetland, Nitrogen Removal, Operational Mode, Vertical Flow Constructed Wetland

References

[1] Ye, F.X., Li, Y: Ecol. Eng. Vol. 35(2009), p.1043

[2] Vymazal, J: Sci. Total Environ. Vol. 380(2007), p.48

[3] Fleming-Singer, M.S., Horne, A.J: Ecol. Eng. Vol. 26 (2006), p.147

[4] Y F Lin, S R Jing, D Y Lee, Y F Chang, K C Shi: Bio. Tech. Vol. 99 (2008), p.7504

[5] APHA (American Public Health Association): Standard Methods for the Examination of Water and Wastewater, 19thed. APHA, Washington, D.C. (1995)