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DOI : , Vol.19, No.4, 19 ~ 31, 2011
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| Title |
| Estimation of Urban Nonpoint Pollution Source in Wastewater Treatment Plant 1. The parameter estimation of SWMM for the calculation of influents in wastewater treatment plant at rainy seasons |
| 이병헌 Byung Hun Lee , 정창욱 Chang Wook Jung , 김정숙 Jeong Suk Kim |
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| Abstract |
| Main objectives of sewer system are flood disaster prevention by storm water exclusion and water quality preservation by sewage exclusion. At wet weather periods, the quantity and quality of wastewater treatment plant influent is variation by rain. The influent characteristics of wastewater treatment plant are very important factors of the wastewater treatment plant operation. If we want to estimate nonpoint source pollution of wastewater treatment plant, we need to know the influent characteristics of rainy seasons. Mike SWMM(stormwater management model), Mike Urban, XP-SWMM based SWMM(US EPA) are used for simulation of the wastewater treatment plant influent characteristics. The parameters estimation methods for the quantity simulation of SWMM were well developed. But, the parameters estimation methods for the wastewater quality characteristics by SWMM simulation is increasing interest recently. This study used surface response analysis method for the parameters estimation for the quality simulation of SWMM. Which method can save the times and get the same answers of every trial. The optimum parameters value of SWMM for influent concentration of wastewater treatment plant are as following. For BOD concentration, the maximum buildup is 1.0, time exponential is 0.03, washoff coefficient is 0.8 and washoff exponential is 2.0, respectively. For TN concentration, maximum buildup is 2.2, buildup rate is 0.88, washoff coefficient is 0.46 and washoff exponential is 0.9, respectively. For TP concentration, maximum buildup is 0.55, buildup rate is 0.40, washoff coefficient is 0.19 and washoff exponential is 0.99, respectively. |
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| Key Words |
| SWMM, Nonpoint pollutant source, Water quality parameter, Parameter estimation, Response surface methodology, wastewater treatment plant |
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