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:: Volume 10, Issue 2 (vol- 2 2004) ::
Horizon Med Sci 2004, 10(2): 36-41 Back to browse issues page
A survey on detergent removal in Qods township wastewater treatment plant based on activated sludge method
AH. Mahvi Dr. 1, N. Alavi Nakhjavan, K. Naddafi Dr.
1- , ahmahvi@yahoo.com
Abstract:   (13409 Views)
Background and Aim: Surfactants are organic chemicals that aggregate in joint surface of gas-liquid or solid-liquid so change water characteristics, and accelerate cleaning process by declining surface tension. Surfactants, in fact, are the main chemicals in detergents and constitute 5-30% of the detergents by weight. Detergents enter the environment, through the direct discharge of raw wastewater or treated effluent, and reduce the quality of water resources and increase treatment costs. Considering detergents discharge limit, based on effluent discharge standards as 1.5 mg/l for surface water, 0.5 mg/l for groundwater, and for agricultural use. The goal of this study was to investigate the efficiency control of Qods township wastewater treatment plant. Materials and Methods: In this s experimental research the detergent amounts of raw and treated wastewater were measured for six successive weeks, six samples per week. Anionic surfactants were determined through MBAS method and compared with discharge standards. Results: The findings showed that detergent amounts in raw wastewater was about 1.23 to 5.23 mg/l and in treated waste water was about 0.093 to 0.263 mg/l. The removal efficiency was determined to be 93%. Conclusion: Considering the results of this research and comparison of high removal efficiency of detergent waster effluent discharge standard, into environment, it was observed that the amount of detergent of effluent was lower than effluent discharge standards into surface water and groundwater, so a modern treatment would not be necessary.
Keywords: Qhods township WWTP; Activated sludge; Detergent removal
Full-Text [DOC 211 kb]   (9013 Downloads)    
Type of Study: Original | Subject: Internal Medicine
Received: 2008/07/26
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Mahvi A, Alavi Nakhjavan N, Naddafi K. A survey on detergent removal in Qods township wastewater treatment plant based on activated sludge method. Horizon Med Sci . 2004; 10 (2) :36-41
URL: http://hms.gmu.ac.ir/article-1-267-en.html

Volume 10, Issue 2 (vol- 2 2004) Back to browse issues page
مجله علمی پژوهشی افق دانش The Horizon of Medical Sciences
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