| Title |
Development of Methodology for Optimal Determination of Wastewater Treatment Plant Location and River Water Quality Standard |
| Authors |
구자공 ; 이병국 ; 한상욱 ( Ja Kong Koo ; Byung Kook Lee ; Sang Uk Han ) |
| Abstract |
The purpose of this study is the development of regional water quality management schemes considering low treatment cost and high dissolved oxygen level for the construction of new treatment plant. In this study, water quality simulation model QUAL2E, mixed integer programming, and fuzzy set concept were utilized. The Joong Ryang-Cheon basin in the east-north part of Seoul, Korea during August, 1983 was selected as the study area. After analyzing the relationship between pollution source load and water quality effect by using QUAL2E, the optimization techniques were used to minimize the total treatment cost of the study basin by the selection of optimal plant sites and by the utilization of the self-purification capacity which is one of the environmental resource. The fuzzy set concept was applied to optimization technique for the acquisition of dissolved oxygen levels in the setting of zoned standard by using minimum operator and linear membership function. The followings are the results of this study: 1) The attainable uniform dissolved oxygen standard in JoongRyang-Cheon at August, 1983 where the potential seven treatment plants were located was 3.5 ㎎/ℓ. 2) Using mixed integer programming, the location and number of treatment plants, and the optimal treatment levels could be determined. 3) As in the method of zoned standard, the spatial flexibility can save the unnecessary huge expenditure on the environmental control, especially in the region of higher environmental quality levels. 4) By using the fuzzy set concept, it was possible to know beforehand the maximum & optimal attainable standards of dissolved oxygen concentration at the checking points without heavy computational burden by excluding the iteration step in setting standards. |