earticle

영어

This study was conducted to applicability of post membrane through the O3/BAC process with a pilot plant installed 25 m3/day scale to the Y purification plant in S city. Chlorine demand and chlorine decay rate (k*C0) were compared for post membrane and BAC filtered water. chlorine demand of BAC effluents at 24 hr, 48 hr was 0.1 mg/L and 0.15 mg/L higher than the measured post membrane effluents. Also k*C0 values appear that chlorine decay rate was reduced by 25% more than BAC filtered water when post membrane was applied. BAC filtered water was observed by 637 CFU/mL bacteria and 1.26 × 104CFU/mL HPC. However, through the post membrane filtration process, it was observed that 0 CFU/mL bacteria and 3.8 × 10 CFU/mL HPC. For the comparison of particle counts, we experiment the three pattern. First Immediately after backwashing, second different filter to waste time and last using post membrane filtration. As a result, there were no particle counts difference occurred before and after backwashing with post membrane filtration process. Through this study, O3/BAC/Membrane filtration confirmed the applicability of the process.

한국어

본 연구는 S시 Y 정수장에 25 m3/day 규모의 Pilot plant를 설치하여 O3/BAC 공정에서 후단여과막 적용성에 대한 연구를 수행하였다. 24 hr, 48 hr 염소요구량은 각각 0.1 mg/L, 0.15 mg/L의 차이만큼 BAC 여과수가 높은 값을 나타내었고,k*C0 값은 후단여과막 적용 시 염소소비속도가 BAC 유출수보다 25% 감소하는 것으로 나타났다. 일반세균 및 HPC를 관찰한 결과 BAC 여과수에서는 637 CFU/mL, 1.26 × 104 CFU/mL가 관측되었지만, 후단여과막을 설치, 적용하면서 일반세균은 관측되지 않았고, HPC는 3.8 × 10 CFU/mL가 관측되었다. BAC 역세척 직후 곧바로 배출, 시동방수시간을 달리해서 배출 그리고 후단여과막을 이용하여서 곧바로 배출하는 3가지 형태로 입자수를 비교하는 실험한 결과, 후단여과막적용 시 역세척 전과 후의 입자계수 차이가 거의 발생하지 않는 것을 확인할 수 있었다. 본 연구를 통해 O3/BAC/Membrane 공정의 적용 가능성을 확인하였다.