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:: Volume 2, Issue 2 ( Spring, 2015) ::
Environ. health eng. manag. 2015, 2(2): 87-92 Back to browse issues page
Efficiency of horizontal roughing filter in removing nitrate, phosphate and chemical oxygen demand from effluent of waste stabilization pond
Seyed Mostafa Khezri , Gharibi Majid , Hossein Jafari Mansoorian , Mohsen Ansari , Farideh Atabi , Taha Tohidi Mogaddam , Nahid Rashtchi *
*Corresponding Author: MSc, Environmental Engineering–Water and Wastewater, Islamic Azad University, Western Tehran Branch, Tehran, Iran , nahidrashtchi1392@gmail.com
Abstract:   (3272 Views)

Background: The effective size of the end grain of horizontal roughing filters (HRFs) is larger than 2 mm. This study aimed to examine the efficiency of HRFs in removing nitrate, phosphate, and chemical oxygen demand (COD) from effluent of a wastewater stabilization pond. Methods: This experimental study was conducted in 2013. The pilot project was transferred to the Karaj wastewater treatment plant (stabilization pond), and the installation, equipping, and start-up of the system began using an effluent treatment plant. Sampling was done from March to August in 3 rates, 0.5, 1 and 1.5 m/h, and included simultaneous sampling from inlet and outlet filtering to determine the concentrations of nitrate, phosphate, and COD. Results: At filtration rates of 0.5, 1, and 1.5 m/h, the average nitrate removal equaled 25%, 32%, and 34%, respectively, average phosphate removal equaled 29%, 26%, and 28%, respectively, and the average COD removal at filtration rates of 0.5, 1, and 1.5 m/h equaled 62%, 66%, and 68%, respectively. Outlet values of phosphate and nitrate were lower than the standards set by the Environmental Standards Organization (ESO) (P < 0.05). Conclusion: According to the results of this study, the HRF function was approximately adequate in COD removal, but its efficiency in nitrate and phosphate removal was lower.

Keywords: Wastewater stabilization pond, Horizontal roughing filter, Nitrate, Phosphate, Chemical oxygen demand
eprint link: http://eprints.kmu.ac.ir/id/eprint/22179
Full-Text [PDF 374 kb]   (981 Downloads)    
Type of Study: Research | Subject: General
Received: 2015/07/6 | Accepted: 2015/07/6 | Published: 2015/07/6
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Khezri S M, Majid G, Jafari Mansoorian H, Ansari M, Atabi F, Tohidi Mogaddam T et al . Efficiency of horizontal roughing filter in removing nitrate, phosphate and chemical oxygen demand from effluent of waste stabilization pond. Environ. health eng. manag.. 2015; 2 (2) :87-92
URL: http://ehemj.com/article-1-74-en.html
Volume 2, Issue 2 ( Spring, 2015) Back to browse issues page
مجله مدیریت و مهندسی بهداشت محیط Environmental Health Engineering And Management Journal
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