earticle

영어

The objective of this study is the performance evaluation of the hydrocyclone coagulation/flocculation combined with upflow filter system (HCCF) and backwashing for treatment of storm runoff. Effluent characteristic was analyzed through filtration of particulate fiber media after hydrocyclone coagulation/flocculation targeted to a simulated rainfall runoff in roadside sediment. In the range of linear velocity 18.1 ~ 24.2 m/hr (mean 21.3 m/hr) and PACS injection concentration 6.0 ~ 8.1 mg/L (mean 6.9 mg/L), effluent turbidity was 0.4 ~ 108.5 NTU (mean 18.7 NTU) and removal efficiency was analyzed as 59.1 ~ 99.9% (solid loading 10.5 ~ 0.0 kg/m2). SS concentration was 0.0 ~ 186.0 mg/L (mean 42.8 mg/L) and removal efficiency was 48.8 ~ 100.0% (solid loading 10.5 ~ 0.0 kg/m2). As a result of analysis of mass balance, the amount of solids removed by flocculation and filtration were 85.4 ~ 89.2% about influent solids loading 100%, and 10.8 ~ 14.6% were discharged. 45.7 ~ 52.1% of solids remaining in the stagnant drainage column were discharged after the termination of process, 16.8 ~ 18.3% of solids were discharged in the first backwash, 5.1 ~ 6.9% of solids were discharged in the second backwash. The solids remaining in the column was 14.1 ~ 16.4%. As a result of HCCF experiment, solids removal efficiency was about 5.0% higher compared with the results of the only filtration experiment, and the solid rate removed by stagnant drainage was about 20.0% higher. The solids remaining in the column after backwash decreased by more than 5.0%. The hydrocyclone coagulation/flocculation system is considered as a high recommended additional facility to improve the efficiency of the process and the backwash of the simple filtration treatment facility for nonpoint pollutants.

한국어

본 연구에서는 하이드로싸이클론 응집/응결, 여과장치를 조합한 상향류식 강우유출수 여과장치(HCCF)의 강우유출수 처리특성 및역세척 특성을 파악하고자 하였다. 도로변 퇴적물로 모의한 강우유출수를 대상으로 하이드로싸이클론 응집/응결 후 입자상 섬유여재의 여과를 통해 유출된 처리수의 수질특성을 분석하였다. 여과선속도 18.1 ~ 24.2 m/hr(평균 21.3 m/hr), PACS 주입농도 6.0 ~ 8.1 mg/ L (평균 6.9 mg/L) 범위에서 유출수의 탁도는 0.4 ~ 108.5 NTU(평균 18.7 NTU), 처리효율 59.1 ~ 99.9%(고형물부하 10.5 ~ 0.0 kg/m2) 로 나타났다. SS농도는 0.0 ~ 186.0 mg/L(평균 42.8 mg/L)로 48.8 ~ 100.0%(고형물부하 10.5 ~ 0.0 kg/m2)의 처리효율을 나타내었다. 물질수지를 분석한 결과, 유입수 고형물부하 100.0%에 대하여 응집/응결 및 여과로 제거된 고형물양은 85.4 ~ 89.2%였으며, 처리수로 10.8 ~ 14.6%가 유출되었다. 처리 종료 후 정체수의 배수로 컬럼에 남아있는 고형물의 45.7 ~ 52.1%가 배출되었고 첫 번째 역세척으로 16.8 ~ 18.3%, 두 번째 역세척으로 5.1 ~ 6.9%가 배출되었다. 컬럼내에 남아있는 고형물은 14.1 ~ 16.4%로 나타났다. HCCF 의 실험결과 단순여과실험과 비교하여 고형물 처리효율이 약 5.0% 높았고 정체수의 배수로 제거되는 고형물의 비율이 20.0% 정도높았다. 역세척 후의 컬럼에 남아있는 고형물도 5.0% 이상 줄어들었다. 하이드로싸이클론 응집/응결 시스템은 단순여과형 비점오염저감시설의 처리효율과 역세척 효율을 향상시킬 수 있는 추가시설로서의 적용가능성이 높을 것으로 판단된다.