| Title |
A Study on the Evaluation for Operations of Public Sewage Treatment Plants Using Statistics Technique |
| Authors |
최인철 ( In Cheol Choi ) ; 안태웅 ( Tae Ung Ahn ) ; 유순주 ( Soon Ju Yu ) ; 정현미 ( Hyen Mi Chung ) ; 권오상 ( Oh Sang Kwon ) ; 김원기 ( Won Ky Kim ) ; 염익태 ( Ick Tae Yeom ) ; 손대희 ( Dae Hee Son ) |
| DOI |
https://doi.org/10.15681/KSWE.2014.30.5.524 |
| Keywords |
Evaluation for operations; Frequency analysis; Normal distribution analysis; Percentile; Public sewage treatment plants; PSTPs; Statistics technique |
| Abstract |
Korea has been trying to manage water quality of rivers and lakes in many ways. Ministry of Environment is making continuous efforts of operation control improvement such as strengthening effluent standards in sewage treatment plants and expanding Tele-Monitoring System (TMS). However, evaluation method for operations of sewage treatment plants and establishment system of effluent standards are inadequate. The objective of this study is to evaluate for operations of sewage treatment plants using statistics technique such as frequency analysis, percentile, normal distribution analysis. We used the effluent data (BOD, COD, SS) collected at 299 plants in 2012. The values were very low by comparison with standards. The Data followed a normal distribution. We think that distribution characteristics are closely related with effluent standards, especially T-P and BOD. Statistics technique attempted in this study can be used to evaluate for operations of sewage treatment plants and assess the appropriateness of effluent standards based on TBEL(Technology-based effluent limitation). And, this technique can be used to figure out the overall level of plants, the status of each plant and the favorable treatment process for each item (BOD, COD etc.). Data acquired through this method can be used to improve facilities and operation techniques and decide on a sewerage policy. |