Nitrogen and phosphorus removal from wastewater by subsurface wetlands planted with Iris pseudacorus |
| |
| Authors: | Z Yousefi A Mohseni-Bandpei |
| |
| Institution: | 1. Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, PR China;2. Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun 130118, PR China;3. Graduate University of the Chinese Academy of Sciences, Beijing 100049, PR China;1. National Research Center, Water Pollution Research Department, P. Box 12622, Dokki, Gizza, Egypt;2. University Consortium for Industrial & Managerial Economics (CUIEM), Italy;1. State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163# Xianlin Ave., Nanjing, Jiangsu 210023, PR China;2. South China Institute of Environmental Sciences, MEP, Guangzhou 510655, China;1. Research Institute of Environmental Sciences, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China;2. Nantong University, Nantong 226019, China;1. Ecological Engineering Research Center, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei City 106, Taiwan;2. Department of Biological Systems Engineering, Hampton Roads Agricultural Research and Extension Center, Virginia Polytechnic Institute and State University, 1444 Diamond Springs Road, Virginia Beach, VA 23455, USA;3. Department of Forest Resources and Environmental Conservation, Virginia Polytechnic Institute and State University, 307-D Cheatham Hall, 310 West Campus Dr., Blacksburg, VA 24061, USA;4. Department of Civil and Environmental Engineering, Occoquan Watershed Laboratory, Virginia Polytechnic Institute and State University, 9408 Prince William Street, Manassas, VA 20110, USA |
| |
| Abstract: | Subsurface horizontal flow constructed wetlands are being evaluated for nitrogen (N) and phosphorus (P) removal from wastewater in this study through different gravel sizes, plant densities (Iris pseudacorus), effects of retention times (1 to 10 days) on N and P removal in continuously fed gravel wetland. The inlet and outlet samples were analyzed for TKN, NH4-N, and NO3-N, as standard methods. The planted wetland reactor with fine (SG) and coarse (BG) gravels removed 49.4% and 31.4% TKN, respectively, while unplanted reactors removed 43.4% and 26.8% TKN. Also, the efficiencies for NH4-N were 36.7–43% and 21.6–25.4% for SG and BG planted reactors, respectively. The efficiencies for NO3-N were 53.5–62.5% and 21.6–25.4% for SG and BG planted reactors, respectively. Roles of plants in SG reactors for O-PO4 were 5–12% and 3–8% in BG. Also, the roles of plants in the reactors for TP were 9% and 7.4%. The minimum effective detention time for the removal of NO3-N was 4–5 days. The subsurface constructed wetlands planted with I. pseudacorus can be an appropriate alternative in wastewater treatment natural system in small communities. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
