여과형 시설에 적용되는 여재의 처리효율 영향인자를 고려한 실증화 평가

• Published in: 한국물환경학회지 Vol. 33; no. 5; pp. 572 - 579
• Main Authors: 김태윤, 이준배, 이동우, 신현석, 김현철, 권순철, Kim, Taeyoon, Lee, Junebae, Lee, Dongwoo, Shin, Hyunsuk, Kim, Hyunchul, Kwon, Soonchul
• Format: Journal Article
• Language: Korean
• Published: 한국물환경학회 30.09.2017
• Subjects: 환경공학; Filtration system; Media; Clogging; Prmeability coefficients
• DOI: 10.15681/KSWE.2017.33.5.572
• ISSN: 2289-0971

Increased impervious surface caused by rapid urbanization serves to produce the discharge of non-point source pollutants such as total suspended solid (TSS). There exist various methods of removing TSS, including a filtration process using granular media (a well-known method to be practically used after the consideration of removal efficiency, clogging, and backwashing efficiency). To determine the TSS removal capability of the filter, we initially performed lab-scale experiments which assessed flow rates, influent concentrations, permeability co-efficients, the particular shapes of suspended solids and potential clogging, and also evaluated TSS removal efficiency when applied to filtration facility in a pilot-scale. In low filtration flux condition, the removal efficiency of suspended solids was more than 95 %, while decreased to 83% in high filtration flux. Regarding the clogging aspect of the experiment, total cumulative solids were loaded up to $19.15kg/m^2$, and TSS removal efficiency was noted to commence to decrease when the loaded solids exceeded $9.0kg/m^2$. It was also noted, however, that superior efficiency was maintained for six hours. In addition, for pilot-scale experiment, the removal efficiency was still high enough (83.4 %) for the solid concentration of 140 ~ 343 mg SS/L and after backwashing, head loss was recovered to 92 ~ 95 % during two hour filtration. With these results, It was confirmed that lifetime of the filter applied to the test was prolonged due to the high treatment efficiency and good backwashing efficiency for the cumulative solids load.