Estimation of Kermanshah Domestic Wastewater Characteristics Based on Socio-economic Variables

• Main Authors: Ali Almasi, Mohammad Tagi Eyvazi, Mansour Rezaee, Ehsan Amir Pour
• Format: Article
• Language: English
• Published: Water and Wastewater Consulting Engineers Research Development 2005-06-01
• Series: آب و فاضلاب
• Subjects: Socioeconomic Variables; Wastewater Characteristics; Kermanshah
• Online Access: http://www.wwjournal.ir/article_2128_7abb851f6f2583506a565b1c95b6903d.pdf
• ISSN: 1024-5936; 2383-0905

A survey of wastewater characteristics in Kermanshah City was conducted to evaluate the range of pollutant ratios (BOD, SS, N, and P, to COD) that can be used to assess the robustness of wastewater management systems in terms of sustainability. The method of study is descriptive and analytical. Data were collected from three districts of the city that were socio-economically different (Ellaheiah, Taavon and Kasra) and considered to be true representatives of the population. Average values of BOD5/COD (0.58, 0.55 and 0.56 mg/mg); SS/COD (0.633, 0.619, 0.636); N/COD (0.09, 0.078 and 0.076); and P/COD (0.016, 0.015 and 0.018) were obtained from the three districts of the city,  Ellaheiah, Taavon and Kasra, respectively. The alkalinity of the wastewater was 2.5 times stronger than normal wastewater. The results indicate that despite seemingly different values for the parameters measured, no significant differences exist among samples from the three study districts.  Based on BOD and COD, the samples seem to range from medium to strong. BOD/COD ratios are almost satisfactory (0.5 -0.6) in the sense that more than 0.55% of carbonaceous material is biodegradable. Regarding TKN, total phosphorous concentration is in the range of medium wastewaters. Phosphorous concentration in the wastewater from Kasra was significantly higher than those from the other two districts.