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:: Volume 2, Issue 1 (Winter, 2015) ::
Environ. Health Eng. Manag. 2015, 2(1): 23-30 Back to browse issues page
Investigating the efficiency and kinetic coefficients of nutrient removal in the subsurface artificial wetland of Yazd wastewater treatment plant
Mahdi Farzadkia , Mohammad Hassan Ehrampoush , Ehsan Abouee Mehrizi , Shahram Sadeghi , Parvaneh Talebi , Akbar Salehi , Majid Kermani
Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran , majidkermani@yahoo.com
Abstract:   (14757 Views)

Background: Investigating the performance of naturally operated treatment plants may be due to the fact that they cannot be operated as desired, or that they should be modified to achieve good performance e.g. for nutrients removal. The advantage of kinetic coefficient determination is that the model can be adjusted to fit data and then used for analyzing alternatives to improve the process. This study investigates the efficiency of subsurface artificial wetland and determines its kinetic coefficients for nutrient removal. Methods: The present study investigated the kinetics of biological reactions that occurred in subsurface wetland to remove wastewater nutrient. Samples were taken from 3 locations of wetlands for 6 months. The nutrient content was determined through measuring Total Kjehldahl Nitrogen (TKN), ammonium, nitrate, and phosphate values. Results: Average levels for TKN, ammonium, nitrate, and phosphate in effluent of control wetland were 41.15, 23.59, 1.735, and 6.43 mg/L, and in wetland with reeds were 28.91, 19.99, 1.49 and 5.63 mg/L, respectively. First-order, second-order, and Stover-Kincannon models were applied and analyzed using statistical parameters obtained from the models (Umax, KB). Conclusion: The nutrients removal at Yazd wastewater treatment plant was remarkable, and the presence of reeds in wetland beds was not very efficient in improving system performance. Other more efficient plants are suggested to be evaluated in the system. Stover-Kincannon kinetic model provided predictions having the closest relationship with actual data obtained from the field.

Keywords: Wastewater, Wetland, Nutrients, Kinetic coefficients, Yazd
eprint link: http://eprints.kmu.ac.ir/id/eprint/22168
Full-Text [PDF 993 kb]   (3366 Downloads)    
Type of Study: Original Article | Subject: Special
Received: 2015/03/16 | Accepted: 2015/03/16 | Published: 2015/03/16
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Farzadkia M, Ehrampoush M H, Abouee Mehrizi E, Sadeghi S, Talebi P, Salehi A et al . Investigating the efficiency and kinetic coefficients of nutrient removal in the subsurface artificial wetland of Yazd wastewater treatment plant. Environ. Health Eng. Manag. 2015; 2 (1) :23-30
URL: http://ehemj.com/article-1-53-en.html

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Volume 2, Issue 1 (Winter, 2015) Back to browse issues page
Environmental Health Engineering And Management Journal Environmental Health Engineering And Management Journal
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