본 논문에서는 상온에서 kaolin, humic acid, dextran blue를 포함한 인공원수를 조제하고 처리하는 2단 응집여과 시스템을 구성하였다. pH 7.2, 탁도 58 NTU~1,277 NTU 범위에서 10 ㎛ stainless steel filter, 6 ㎛ ...
본 논문에서는 상온에서 kaolin, humic acid, dextran blue를 포함한 인공원수를 조제하고 처리하는 2단 응집여과 시스템을 구성하였다. pH 7.2, 탁도 58 NTU~1,277 NTU 범위에서 10 ㎛ stainless steel filter, 6 ㎛ 여과지, 0.22 ㎛ PP filter로 구성한 2단 응집여과 처리에 관한 연구를 수행하였다. 여과지를 사용한 실험결과 소수성·친수성 공존 시 NOM 제거율은 1단 응집여과에 비해 2단 응집여과 공정에서 각각 8.7 %, 11.6 % 증가하여 친수성 NOM 제거효율이 향상되었다. 소수성 NOM 단독 존재 시 제거율은 친수성 NOM과 공존 시와 유사하였으나, 친수성 NOM 단독 존재 시, 소수성 NOM과 공존 시에 비해 1단 응집여과 과정에서 13.2 %, 2단 응집여과 과정에서 14.6 % 증가하였다. 이와 같은 결과로부터 1단 응집여과에서 소수성 NOM이 제거되고 2단 응집여과에서 친수성 NOM이 효율적으로 제거됨을 알 수 있다. 미세 PP filter 실험 결과 1단 응집여과에 비해 2단 응집여과 공정에서 소수성·친수성 NOM 제거율이 각각 4.9 %, 12.8 % 증가하여 여과지 실험결과와 동일한 경향을 나타내었고, 소수성·친수성 NOM의 제거율이 각각 3.7 %, 1.6 % 증가하였다. 이상의 결과로부터 알루미늄계 응집제와 소수성 NOM의 반응이 강한 1단 응집여과 단계에서 소수성NOM이 제거되고, 2단 응집여과 단계에서 친수성 NOM이 우세하게 제거되는 공정임을 확인하였다.
본 논문에서는 상온에서 kaolin, humic acid, dextran blue를 포함한 인공원수를 조제하고 처리하는 2단 응집여과 시스템을 구성하였다. pH 7.2, 탁도 58 NTU~1,277 NTU 범위에서 10 ㎛ stainless steel filter, 6 ㎛ 여과지, 0.22 ㎛ PP filter로 구성한 2단 응집여과 처리에 관한 연구를 수행하였다. 여과지를 사용한 실험결과 소수성·친수성 공존 시 NOM 제거율은 1단 응집여과에 비해 2단 응집여과 공정에서 각각 8.7 %, 11.6 % 증가하여 친수성 NOM 제거효율이 향상되었다. 소수성 NOM 단독 존재 시 제거율은 친수성 NOM과 공존 시와 유사하였으나, 친수성 NOM 단독 존재 시, 소수성 NOM과 공존 시에 비해 1단 응집여과 과정에서 13.2 %, 2단 응집여과 과정에서 14.6 % 증가하였다. 이와 같은 결과로부터 1단 응집여과에서 소수성 NOM이 제거되고 2단 응집여과에서 친수성 NOM이 효율적으로 제거됨을 알 수 있다. 미세 PP filter 실험 결과 1단 응집여과에 비해 2단 응집여과 공정에서 소수성·친수성 NOM 제거율이 각각 4.9 %, 12.8 % 증가하여 여과지 실험결과와 동일한 경향을 나타내었고, 소수성·친수성 NOM의 제거율이 각각 3.7 %, 1.6 % 증가하였다. 이상의 결과로부터 알루미늄계 응집제와 소수성 NOM의 반응이 강한 1단 응집여과 단계에서 소수성NOM이 제거되고, 2단 응집여과 단계에서 친수성 NOM이 우세하게 제거되는 공정임을 확인하였다.
A two stage coagulation and filtration system was utilized to treat the artificial feed water including the kaolin, the humic acid and the dextran blue. This study was concerning on the treatment using the two stage coagulation and filtration which was consisted of the stainless steel filter having ...
A two stage coagulation and filtration system was utilized to treat the artificial feed water including the kaolin, the humic acid and the dextran blue. This study was concerning on the treatment using the two stage coagulation and filtration which was consisted of the stainless steel filter having 10 ㎛ pore, the 6 ㎛ filter paper and the 0.22 ㎛ PP fiber filter. The pH and the turbidity of the feed water were 7.2 and 58∼1,277 NTU respectively. According to experiments using the filter paper, the removal rate of NOMs at the two stage system was enhanced 8.7 % for the hydrophobic NOMs and 11.6 % for the hydrophilic NOMs over the single stage system and so the removal rate of the hydrophilic NOM was more enhanced than the hydrophobic when they were dissolved in same feed water. When only the hydrophobic NOMs were dissolved, their removal rate was similar with the situation that two kinds of NOMs were dissolved at same feed water. But when only the hydrophilic NOMs were dissolved, the hydrophilic NOMs removal was increased 13.2 % at the first stage and 14.6 % at the second stage with the comparison of two kinds of NOMs dissolved together. From these results, it is expected that most of hydrophobic NOMs were removed at the first stage and the hydrophilic NOMs was efficiently removed at the second stage. According to experiments using the PP fiber filter, removal rates of the hydrophobic NOMs and the hydrophilic NOMs were increased 4.9 % and 12.8 % respectively at the two stage system with comparison of the single stage system which were same trend with experimental results using the filter paper. And also the removal rates of the hydrophobic NOMs and the hydrophilic NOMs were increased 3.7 % and 6.0 % respectively more than filter paper experiment. As conclusion, experimental results showed that most of the hydrophobic NOMs were removed at the first stage by the strong coagulation reaction of the hydrophobic NOMs with aluminum coagulants and, after that, the hydrophilic NOMs were removed more efficiently at the second stage since only a few the hydrophobic NOMs were left, and so there are no competitor for coagulation reaction of the hydrophilic NOMs at the second stage.
A two stage coagulation and filtration system was utilized to treat the artificial feed water including the kaolin, the humic acid and the dextran blue. This study was concerning on the treatment using the two stage coagulation and filtration which was consisted of the stainless steel filter having 10 ㎛ pore, the 6 ㎛ filter paper and the 0.22 ㎛ PP fiber filter. The pH and the turbidity of the feed water were 7.2 and 58∼1,277 NTU respectively. According to experiments using the filter paper, the removal rate of NOMs at the two stage system was enhanced 8.7 % for the hydrophobic NOMs and 11.6 % for the hydrophilic NOMs over the single stage system and so the removal rate of the hydrophilic NOM was more enhanced than the hydrophobic when they were dissolved in same feed water. When only the hydrophobic NOMs were dissolved, their removal rate was similar with the situation that two kinds of NOMs were dissolved at same feed water. But when only the hydrophilic NOMs were dissolved, the hydrophilic NOMs removal was increased 13.2 % at the first stage and 14.6 % at the second stage with the comparison of two kinds of NOMs dissolved together. From these results, it is expected that most of hydrophobic NOMs were removed at the first stage and the hydrophilic NOMs was efficiently removed at the second stage. According to experiments using the PP fiber filter, removal rates of the hydrophobic NOMs and the hydrophilic NOMs were increased 4.9 % and 12.8 % respectively at the two stage system with comparison of the single stage system which were same trend with experimental results using the filter paper. And also the removal rates of the hydrophobic NOMs and the hydrophilic NOMs were increased 3.7 % and 6.0 % respectively more than filter paper experiment. As conclusion, experimental results showed that most of the hydrophobic NOMs were removed at the first stage by the strong coagulation reaction of the hydrophobic NOMs with aluminum coagulants and, after that, the hydrophilic NOMs were removed more efficiently at the second stage since only a few the hydrophobic NOMs were left, and so there are no competitor for coagulation reaction of the hydrophilic NOMs at the second stage.
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