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Removal Characteristics of Cyclic Ethers in Biological Wastewater Treatment System

고리형 에테르의 생물학적 처리 특성

  • Lee, Sung-Ryul (Korea National Housing Corporation, Division of Facility Management) ;
  • Jeong, Yeon-Koo (Department of Civil and Environmental Engineering, Kumoh National Institute of Technology)
  • 이성열 (대한주택공사 시설관리처) ;
  • 정연구 (금오공과대학교 토목환경공학부)
  • Published : 2008.03.31

Abstract

The fate of two cyclic ethers, THF(Tetrahydrofuran) and 1,4-Dioxane, in conventional biological wastewater treatment plants was investigated using sequential activated sludge process. Removal efficiency of THF were about 86% in average, which was greater than that of 1,4-Dioxane, 30%. However, it was not clear whether the removal of cyclic ethers in biological system was caused by microbial activity or not. Thus treatability tests were conducted by batch experiments. The effects of mixing, aeration and the addition of activated sludge on the removal of cyclic ethers were investigated in batch experiments. THF was totally removed by mixing and aeration in 24 hours while removal ratio of 1,4-Dioxane was at most 30% for the same period. This results could be ascribed to the differences in Henry's law constants between the two chemicals. In addition, biological degradation including biosorption was not obviously observed in these batch tests.

Keywords

THF;1,4-Dioxane;Sequencing activated sludge;Mixing;Aeration

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