• Lab-Scale Air/Bio-Sparging Study to Remediate Diesel-Contaminated Soil and Groundwater : The Effect of Air Injection Rate and Pattern
  • Chang, Soon-Woong;Lee, Si-Jin;Cho, Su-Hyung;Yoon, Jun-Ki;
  • Dept. of Environmental Engineering, Kyonggi University;Dept. of Environmental Engineering, Kyonggi University;Environmental Facilities Management Corporation;Engineering & Construction Group, Samsung Corporation;
  • 디젤오염 토양 및 지하수 복원을 위한 공기주입정화법 실험실 연구 : 공기주입량과 공기주입방식의 영향
  • 장순웅;이시진;조수형;윤준기;
  • 경기대학교 환경공학과;경기대학교 환경공학과;한국시설관리공사;삼성물산 기술연구소;
Abstract
Laboratory-scale two-dimensional aquifer physical model studies were conducted to assess the effect of air injection rate and air injection pattern on the removal of disel contaminated soil and groundwater by air/bio-sparging. The experimental results were represented that the optimal conditions in this experiment were as air injection rate of 1,000 ml/min and pulsed air injection pattern(15 min on/off). The results of the TPH reduction, DO consumption and $CO_2$ production indicate the effective biodegradation evidence of diesel. Based on our results, The minimal $O_2$ supply and pulsed air injection pattern could effectively enhance the diesel removal and the pulsing air injection had effect on oxygenation in this system. Thus, the cost of operating air/bio-sparging system will be reduced if optimal air injection rate and pulsed air injection pattern are applied to remediate contaminants.

본 연구에서는 실험실 규모의 2D air/bio-sparging 장치를 이용하여 공기주입량과 공기주입방식이 디젤오염 토양/지하수의 복원에 미치는 영향을 평가하고 최적 조건을 도출하였다. 최적의 공기주입량과 공기주입방식은 1,000 ml/min의 공기주입과 15 min 간격의 간헐적인 공기주입 패턴이 효율적으로 관찰되었고, 실험기간동안 TPH와 DO 감소, $CO_2$ 생성은 오염원인 디젤이 효과적으로 생분해에 의해 제거가 이루어지고 있음 보여주었다. 즉, 최소한의 공기주입으로도 포화층에서의 디젤 분해를 효과적으로 증진시킬 수 있었으며, 간헐적인 공기주입방식은 대수층내에서의 공기 전달을 증진시킬 수 있었다. 또한 Air/bio-sparging공법의 대부분의 운전비가 blower와 off-gas 처리 시스템에 사용되는 전력비라는 것을 감안 할 때, 최적의 공기주입량과 간헐적인 공기주입방식은 운전비 절감의 효과를 가져다 줄 것으로 판단된다.

Keywords: Air/Bio-sparging;Diesel;Air injection rate;Air injection Pattern;

Keywords: 공기주입정화법;디젤;공기주입량;공기주입 방식;

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This Article

  • 2006; 11(4): 10-17

    Published on Aug 1, 2006