• 멤브레인
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• 제22권6호
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• pp.450-460
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• 2012

스펀지 형태의 담체가 첨가된 침지형 막결합 연속회분식 생물반응기에서 담체가 제거효율과 여과성능에 미치는 영향을 조사하였다. 담체는 반응기 부피 기준으로 각각 5%, 10% 및 20% 첨가하였고, 담체를 첨가하지 않은 반응기를 대조군으로 하였다. COD, T-N 및 T-P에 대한 제거효율은 담체 첨가 유무에 관계없이 큰 차이가 없었다. 그러나 담체를 첨가한 경우, 첨가하지 않은 경우에 비해 조업시간에 따른 막간차압(TMP)은 매우 서서히 증가하였다. 이러한 결과는 폭기에 의해 상승하는 담체가 막 표면과 충돌하게 되고, 이때 막 표면에 형성된 케이크 층을 제거시키기 때문이다. 결론적으로 담체가 첨가된 막결합형 연속회분식 생물반응기는 담체가 없는 반응기에 비해 여과성능이 크게 개선되어, 폐수처리에 효과적으로 활용될 수 있을 것이다.

• 상하수도학회지
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• 제34권3호
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• pp.183-190
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• 2020

Although membrane bio-reactor (MBR) has been widely applied for wastewater treatment plants, the membrane fouling problems are still considered as an obstacle to overcome. Thus, many studies and commercial developments on mitigating membrane fouling in MBR have been carried out. Recently, high voltage impulse (HVI) has gained attention for a possible alternative technique for desalting, non-thermal sterilization, bromate-free disinfection and mitigation of membrane fouling. In this study, it was verified if the HVI could be used for mitigation of membrane fouling, particularly the internal pore fouling in MBR. The HVI was applied to the fouled membrane under different conditions of electric fields (E) and contact time (t) of HVI in order to investigate how much of internal pore fouling was reduced. The internal pore fouling resistance (R_f) after HVI induction was reduced as both E and t increased. For example, R_f decreased by 19% when the applied E was 5 kV/cm and t was 80 min. However, the R_f decreased by 71% as the E increased to 15 kV/cm under the same contact time. The correlation between E and t that needed for 20% of R_f reduction was modeled based on kinetics. The model equation, E^1.54t = 1.2 × 10³ was obtained by the membrane filtration data that were obtained with and without HVI induction. The equation states the products of En and t is always constant, which means that the required contact time can be reduced in accordance with the increase of E.

• 한국막학회:학술대회논문집
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• 한국막학회 1998년도 추계 총회 및 학술발표회
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• pp.150-152
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• 1998

Now the lack of water is serious problem all over the world because of the growth of population and expansion of industrial activities. So wastewater recycle and reuse is essential in many countries. One of the most popular wastewater treatment processes is conventional activated sludge system. In spite of significant degree of treatment rate the biological process has some operational difficulties and capital disadvantages. In conventional activated sludge process, sludge settling condition is getting worse in case of sludge bulking, it is common that overall process fails due to wash-out of biomass causing low concentration of MLSS in the aeration tank. Because of the absence of claifier the membrane bioreactor(MBR) process is less affected by such problems.

• 멤브레인
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• 제21권3호
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• pp.263-269
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• 2011

침지식 막결합형 연속회분식 생물반응기에서 폐수의 도입단계가 제거효율과 여과성능에 미치는 영향을 조사하였다. 호기성 단계의 초기에 공급할 경우(Mode-1)와 무산소 단계의 초기에 공급할 경우(Mode-2)에 대하여 89일 동안 동시에 운전하였다. COD 제거효율과 여과성능은 2가지 운전방식 간에 큰 차이가 없었다. 그러나 영양염류(총질소와 총인)의 제거효율에 있어서 Mode-2가 Mode-1에 비해 보다 효과적이었다. Mode-2의 경우 COD, 총질소 및 총인의 제거율은 각각 99.1, 73.3 및 77.7%이었다.