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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
Environmental Engineering–Water and Wastewater, Islamic Azad University, Western Tehran Branch, Tehran, Iran , nahidrashtchi1392@gmail.com
Abstract:   (5473 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]   (1790 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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