Removal of Odor and THM from the Raw Water of Daecheong Dam

대청호 원수내 냄새 및 THM 제거방안 연구

  • 전항배 (충북대학교 환경공학과) ;
  • 윤기식 (충북대학교 환경공학과 석사과정, 한국수자원공사 수자원연구소)
  • Published : 1997.06.01

Abstract

A pilot scale study for removing odor and trihalomethane formation potential (THMFP) was investigated in the standard water treatment plant equipped with ozone oxidation and granular activated carbon (GAC) adsorption processes. The removal efficiency of dissolved organic carbon (DOC) in the pilot scale standard water treatment process (PSWTP) was about 25%, however, no more removal in the ozone oxidation process. On a GAC after 30 days operation, DOC removal efficiency was about 75%. Odor removal efficiency was about 30% in PSWTP, 60% in ozone oxidation, and almost complete in well as DOC. Mid-1 and 2 that showed breakthrough in odor inducing material as well as DOC. Mid-1 and 2 chlorination was able to reduce trihalomethanes (THM) by 25% compared to prechloringation, while postchlorination alone could reduce them by 30%.

대청호 원수를 취수하여 정수하는 대청수도에서 이취미를 제거하고 THM(Trihalomethanes) 발생량을 줄이기 위하여 기존 표준정수공정에 오존과 활성탄여과공정을 추가한 pilot plant 실험을 수행하였다. pilot 실험결과 표준정수공정에서 DOC(dissolved organic carbon)는 약 25% 제거되었으나, 오존공정에서는 거의 제거되지 않았고, 30일이 지난 후 GAC(granular activated carbon)에서는 약 75%까지 제거되는 것으로 나타났다. 표준정수공정에서 이취미는 약 30%, 오존산화공정에서 약 60%정도 제거되었고, 활성탄여과에서 대부분 제거되었으나, Column 1과 2에서는 DOC와 같이 이취미물질도 파과(breakthrough) 되는 것으로 나타났다. 전염소처리 대신에 중1, 2염소처리를 도입할 경우 전염소처리와 비교하여 약 25%정도의 THM발생량이 감소하였으며, 후염소처리만할 경우 약 30%까지 감소하는 것으로 나타났다.

Keywords

References

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