Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Performance Evaluation for the A/O Pure-Oxygen Biofilm (POB) Process on the Removal of Organics and TKN in the Industrial Wastewater

혐기/호기 순산소 생물막공법에 의한 산업폐수의 유기물 및 TKN 제거 성능평가

  • Jang, Am (Bio-Environmental Engineering Lab. (BEEL), Dept. of Environ. Science & Engineering, Kwangju Institute of Science and Technology (K-JIST)) ;
  • Kim, Hong Suck (Bio-Environmental Engineering Lab. (BEEL), Dept. of Environ. Science & Engineering, Kwangju Institute of Science and Technology (K-JIST)) ;
  • Kim, In S. (Bio-Environmental Engineering Lab. (BEEL), Dept. of Environ. Science & Engineering, Kwangju Institute of Science and Technology (K-JIST))
  • 장암 (광주과학기술원 환경공학과 생물환경공학연구실) ;
  • 김홍석 (광주과학기술원 환경공학과 생물환경공학연구실) ;
  • 김인수 (광주과학기술원 환경공학과 생물환경공학연구실)
  • Received : 1999.11.23
  • Accepted : 2000.02.25
  • Published : 2000.05.31
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Abstract

For the treatment of wastewaters generated from beer industry and petrochemical company with high organic and nitrogen contents, laboratory scale of A/O Pure-Oxygen Biofilm (POB) process was developed and studied by means of the comparative economic analysis with extended aeration process. When the wastewater of beer company was initially treated by the A/O POB process in the ranges of 70 to 150 mg TOC/L diluted with tap water, higher than 92% of TOC removal was accomplished in the all ranges. In case of petrochemical wastewater, the initial TOC removal was as low as 52%, though, it increased to 86% after 32 days of operation and also the TKN removal marked 71% after 27 days. Continuous high removal rates were monitored in both the TOC and TKN parameters during the experimental period. Due to the cost for PSA (Pressure Swing Adsorption) setting and biomass supporting media installation, the initial construction cost of A/O POB process was 2.9 times higher than that of extended aeration process. However, the advantages such as low sludge production, no need for sludge recycling and low energy consumption allow the A/O POB process to have 2.5 times lower operation and maintenance costs. Consequently, in the long term of operation, it is likely that A/O POB process would show higher performance as well as cost effectiveness compared to extended aeration process.

고농도의 유기물과 질소성분을 포함하는 맥주공장과 석유화학 산업폐수를 처리하기 위하여 실험실 규모의 혐기/호기 순산소-생물막 공정 (POB)이 이용되었다. 그리고 A/O POB process와 장기폭기법의 경제성분석도 수행되었다. TOC 농도기준으로 70에서 150 mg TOC/L 범위의 맥주공장폐수가 유입되었을 때 TOC 제거율은 각각 92% 이상으로 좋은 효율을 보였다. 석유화학폐수의 경우 초기 TOC제거율은 52%로 매우 낮았지만 32일 이후에는 86%의 TOC 제거율을 나타내었으며, TKN의 제거율은 유입부하가 증가함에도 불구하고 27일 이후에 71%의 제거율로 유지되었다. 순산소 생물막공법은 초기 건설비인 순산소 발생장치 (PSA)와 메디아 설치비가 소요되기 때문에 장기폭기법에 비하여 약 2.9배 정도 높았다. 이에 반해서 순산소 생물막공법은 극히 적은 잉여슬러지 발생량과 슬러지의 재순환의 불필요, 낮은 에너지 소요량 등의 많은 장점들로 인하여 운전비와 유지비가 약 2.5배 정도 장기폭기법 보다 적었다. 그러므로 장기적인 측면에서 보면 순산소 생물막공법이 높은 처리효율을 가지면서도 장기폭기법보다 경제적인 것으로 생각된다.

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