정수지 내부 단락류 발생 평가: Part A. 정수장 내부 단락류 분석을 통한 장폭비와 형태가 T10/T 값에 미치는 영향 연구

Abstract

Disinfection is a basic and effective microorganism inactivation method and historically contributed a decrease in waterborne diseases. To guarantee the disinfection ability, improving T in CT value is important. Many indexes are used to estimate the hydraulic efficiency, however, these are black-box analysis. Therefore it is need to develope new estimation method. In this study, internal short-circuiting estimation method (ISEM) is developed using CFD and we inquire into the factor which causes increase of T10/T value as LW ratio increases. And the effect of shape on the relation of LW ratio and T10/T is analyzed. As LW ratio increases, internal short-circuiting index (ISI) of influent and effluent zone is rapidly reduced and recirculation and dead zone are reduced in channel zone. Therefore, as the T10/T value converges maximum value, ISI curve is changed from