분산형 빗물관리시설 적용을 위한 수질정화기능 여재 성능 평가
Performance Evaluation of Soil Media for Water Quality Purification at LID Application
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초록
In this study, the water quality purification of new medias which were NPS media, hyugato, mineral stone, charcoal for applying soil media of IntegratedManagement Practices (IMPs) of Low Impact Development (LID) were evaluated. The influent concentrations of COD, T-N, and T-P were 117.8 mg/L,17.1 mg/L, and 2.062 mg/L, respectively. The infiltration capacities of NPS media, hyugoto, mineral stone, charcoal, and gravel were 7.1×10 m/s,7.3×10-5 m/s, 7.9×10-5 m/s, 6.0×10-5 m/s, respectively. All media meet criteria of infiltration capacity as surface soil layer at IMPs which is over 1.0×10-5m/s. Maximum removal rates of COD, T-N, and T-P occurred at Charcoal with 98 % of COD removal rate, NPS with 78 % of T-N removal rate, andhyugato with 75 % fo T-P removal rate, respectively. For more high removal efficiency of all water quality item, the mixed media which is 4.5(NPSmedia): 1(charcoal) : 4.5 (hyugato) as volume ratio was evaluated. The infiltration capacity of mixed media was 7.9×10-5 m/s and met the criteria ofinfiltration as surface soil layer. The water quality removal efficiencies of mixed media were very high with showing 70 % for COD, 85 % for T-N, and71 % for T-P. The mixed media could purify the water quality of surface runoff and was recommended to used at the LID site of ground water qualityproblem.
Abstract
In this study, the water quality purification of new medias which were NPS media, hyugato, mineral stone, charcoal for applying soil media of IntegratedManagement Practices (IMPs) of Low Impact Development (LID) were evaluated. The influent concentrations of COD, T-N, and T-P were 117.8 mg/L,17.1 mg/L, and 2.062 mg/L, respectively. The infiltration capacities of NPS media, hyugoto, mineral stone, charcoal, and gravel were 7.1×10 m/s,7.3×10-5 m/s, 7.9×10-5 m/s, 6.0×10-5 m/s, respectively. All media meet criteria of infiltration capacity as surface soil layer at IMPs which is over 1.0×10-5m/s. Maximum removal rates of COD, T-N, and T-P occurred at Charcoal with 98 % of COD removal rate, NPS with 78 % of T-N removal rate, andhyugato with 75 % fo T-P removal rate, respectively. For more high removal efficiency of all water quality item, the mixed media which is 4.5(NPSmedia): 1(charcoal) : 4.5 (hyugato) as volume ratio was evaluated. The infiltration capacity of mixed media was 7.9×10-5 m/s and met the criteria ofinfiltration as surface soil layer. The water quality removal efficiencies of mixed media were very high with showing 70 % for COD, 85 % for T-N, and71 % for T-P. The mixed media could purify the water quality of surface runoff and was recommended to used at the LID site of ground water qualityproblem.
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