지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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The objectives of this research is to investigate the distribution of aldehydes in Nakdong river water and the characteristics of processes of water treatment system on aldehydes formation and removal. Pilot-scale plant as advanced water treatment system used for this research consists of preozonation, cross-flow settler, rapid sand filter, postozonation, biological activated carbon (BAC) beds. Based on the results, the concentrations of total aldehydes in the river water ranged from 3.4 to 25.0㎍/L in the main stream and from 13.4 to 26.3㎍/L in side stream, respectively. The distribution of aldehydes speciation in the river water showed in the order : formaldehyde, acetaldehyde, propanal, butanal, glyoxal, methy glyoxal, and pentanal. Dominant compounds were formaldehyde and acetaldehyde. Aldehydes concentration of 6.5～13.2㎍/L in the finished water were lower 1/8 to 1/96 than the criteria of Japan and WHO. For ozonation, aldehydes concentrations increased with the increase of ozone dosages of pre- and post-ozonation. The efficiencies of the processes on aldehydes removals were approximate 38% for sedimentation, 46% for rapid sand filter, and 79% for BAC bed, respectively. This shows the advanced water treatment system is more effective in controlling aldehydes.
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