여과형 시설에 적용되는 여재의 처리효율 영향인자를 고려한 실증화 평가 = Verification of the Filter Media Applied to Filter Type Facility Considering the Treatment Efficiency Factor

다국어 초록 (Multilingual Abstract)

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.

참고문헌 (Reference)

1 김태균, "여재 특성에 따른 강우 유출수 내 오염물질 제거특성 평가" 대한환경공학회 31 (31): 483-490, 2009

2 이현동, "비점오염원 유출특성과 저감을 위한 최적관리방안" 한국물환경학회 18 (18): 569-576, 2002

3 문소연, "비점오염 저감시설에 적용되는 여재의 흡착 및 탈착 능력 평가" 한국습지학회 17 (17): 228-236, 2015

4 구본진, "도로면 강우유출수의 입도분포를 고려한 여재특성 비교분석" 대한상하수도학회 27 (27): 299-312, 2013

5 최원석, "도로노면 유출수 처리를 위한 여과에서의 여재별 손실수두 특성" 대한상하수도학회 22 (22): 697-704, 2008

6 강희만, "개선된 여과형 시설의 비점오염물질 처리효율 평가" 한국습지학회 13 (13): 161-169, 2011

7 임찬수, "강우유출수에 의한 비점오염 저감을 위한 하향류식 입상여과 효율 평가" 대한환경공학회 34 (34): 684-693, 2012

8 이병식, "강우유출수 처리시설 침투특성에 대한 필터여재 파쇄의 영향" 한국지반공학회 32 (32): 31-41, 2016

9 Ballard, B. W., "The SUDS Manual, CIRIA C697"

10 Clark, S., "Stormwater Treatment at Critical Areas; Evaluation of Filtration Media" The University of Alabama at Birmingham 1-32, 1999

11 Ministry of Environment(MOE), "Standard of water pollution process test"

12 Andral, M. C., "Particle Size Distribution and Hydrodynamic Characteristics of Solid Matter Carried by Runoff from Motorways" 71 (71): 398-407, 1999

13 Eikebrokk, B., "NOM removal from Drinking Water by Chitosan Coagulation and Filtration through Lightweight Expanded Clay Aggregate Filters" 51 : 323-332, 2002

14 Pitt, R., "Laboratory and field tests of the Up-FloTM Filter" 1-10, 2008

15 Ministry of Environment(MOE), "Installation, Management and operation manual of nonpoint pollutions treatment facility" Ministry of Environment 2016

16 Cho, K. W., "Development of Filtration-treatment Unit for Control of Urban Storm Runoff" 134-140, 2006

17 Cha, S. M., "Determination of best management timing of nonpoint source pollutants using particle bins and dimensionless time in a single stormwater runoff event" 90 : 251-260, 2016

18 Saltnes, T., "Contact Filtration of Humic Waters: Performance of an Expanded Clay Aggregate Filter (Filtralite) Compared to a Dual Anthracite/sand Filter" 2 (2): 17-23, 2002

19 Kang, H. M., "Adsorption Characteristics of Filter Media for Treating Highway Stormwater Runoff" 18 (18): 821-826, 2006