Organic Matter and Nutrient Removal Performance of Horizontal Subsurface Flow Constructed Wetlands Planted with Phragmite karka and Vetiveria zizanioide for Treating Municipal Wastewater

被引：31
作者：
Angassa K. [1 ]
Leta S. [2 ]
Mulat W. [3 ]
Kloos H. [4 ]
Meers E. [5 ]
机构：
[1] Ethiopian Institute of Water Resource, Addis Ababa University, Addis Ababa
[2] Center for Environmental Science, Addis Ababa University, Addis Ababa
[3] Department of Civil and Environmental Engineering, University of Connecticut, Storrs, CT
[4] Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA
[5] Department of Applied Environmental Chemistry, Ghent University, Ghent
来源：
Environmental Processes | 2018年 / 5卷 / 01期
关键词：
Aeration; Constructed wetland; Gravel media; Pollutant removal;
D O I：
10.1007/s40710-017-0276-1
中图分类号：
学科分类号：
摘要：
Three pilot horizontal subsurface flow constructed wetlands (HSSFCWs) were constructed, covered with a geomembrane and filled with gravel media. The study compared the performance of the three pilot HSSFCWs, two planted with Vetiveria zizanioide and Phragmite karka, and one without plants, and all containing aeration facilities in treating municipal wastewater. HSSFCWs were loaded at a hydraulic loading rate of 0.025 m/d and a maximum organic loading rate of 6.16 g BOD/m2d with a hydraulic retention time of 6 days. Results show that V. zizanioide had better removal efficiencies (TSS: 92.3%; BOD5: 92.0%; PO4 3−: 86.7%) than P. karka (TSS: 91.3%; BOD5: 90.5%; PO4 3−: 85.6%), whereas P. karka showed better removal efficiency of NH4 + (86%), NO3 − (81.8%) and SO4 2− (91.7%) than V. zizanioide (NH4 +: 83.4%; NO3 −: 81.3%; SO4 2−: 90.5%). Removal rates in unplanted CWs were lower for all parameters: TSS (78%), BOD5 (73%), NH4 + (61.0%), NO3 − (55.5%), PO4 3− (67.6%), SO4 2− (78.1%). Higher removals of total coliform (3 log units) and Escherichia coli (2.4 log units) were obtained in the HSSFCW with plants compared to unplanted units (total coliform: 1.9 log units; Escherichia coli: 1.2 log units). Based on these findings, the treated water can be directly disposed into surface water bodies or used for irrigation as the concentrations of the pollutants are below the standard permissible limits of effluent discharge set by EEPA and WHO. Therefore, both V. zizanioide and P. karka are good candidates for remediation of wastewater by a constructed wetland system. © 2017, Springer International Publishing AG, part of Springer Nature.
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页码：115 / 130
页数：15
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共 63 条
  • [1] Abay G.K., Impact of low cost ground water contamination in the city of Addis Ababa, (2010)
  • [2] Abbasi H.N., Lu X., Xu F., Xie J., Wastewater treatment strategies in China: overview, Sci Lett, 4, 1, pp. 15-25, (2016)
  • [3] Abdel-hefya H.I., El-Khateeba M.A., Regelsbergerb M., El-Sheikh R., Shehata M., Integrated system for the treatment of black water and greywater via UASB and constructed wetland in Egypt, Desalin Water Treat, 8, pp. 272-278, (2009)
  • [4] Akbarzadeh A., Jamshidi S., Vakhshouri M., Nutrient uptake rate and removal efficiency of Vetiveria zizanioide in contaminated waters, Pollution, 1, 1, pp. 1-8, (2015)
  • [5] Akratos C.S., Tsihrintzis V.A., Effect of temperature, HRT, vegetation and porous media on removal efficiency of pilot-scale horizontal subsurface flow constructed wetlands, Ecol Eng, 29, pp. 173-191, (2007)
  • [6] Standard methods for the examination of water and wastewater, (1999)
  • [7] Arias M.E., Brown M., Feasibility of using constructed treatment wetlands for municipal wastewater treatment in the Bogota Savannah, Colombia, Ecol Eng, 35, pp. 1070-1078, (2009)
  • [8] Avelar F.F., Matos A.T.D., Matos M.P.D., Borges A.C., Coliform bacteria removal from sewage in constructed wetlands planted with Mentha aquatica, (2014)
  • [9] Avila C., Bayona J., Martinc S., Salas J.J., Garcia J., Emerging organic contaminant removal in full-scale hybrid constructed wetland system for wastewater treatment and reuse, Ecol Eng, 80, pp. 108-116, (2015)
  • [10] Baskar G., Deeptha V.T., Annadurai R., Comparison of treatment performance between constructed wetland with different plants. IJRET 3(4):eISSN: 2319-1163 | pISSN: 2321-7308, (2014)
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