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송재준 ( Song Jee-june ),서지양 ( Soe Ji-yang ),천지훈 ( Cheon Ji-hoon ) 한국환경기술학회 2000 한국환경기술학회지 Vol.1 No.3
활성슬러지공정의 부하변동에 공정변수의 조작이 용이하지 않고 고도의 운전기술이 요구되는 단점을 보완하고자 폭기조내의 미생물을 고농도로 유지하면서 운전관리가 쉽도록 미생물을 고정화시키기 위해 메디아를 사용하여 생물막법을 적용시켰다. 그리고 본 연구대상인 식품산업폐수에 적용하기 위해 합성폐수를 조제하여 F/M 비에 따른 처리효율을 메디아공정과 표준활성을 러지공정을 비교하였다. F/M비를 0.1~1.0 kgBOD/kgMLSSㆍday로 변화시켜 실험한 결과 표준활성슬러지조는 F/M비 0.1과 0.8이상에서는 BOD처리효율이 50%이하로 수질이 악화되고 CODcr의 경우에는 F/M비 0.3~0.6에서는 80%이상의 처리효율을 보였으나 F/M비 1.0에서는 57.3%로 낮은 처리효율이 나와 고부하에 대한 처리효율이 급격히 떨어짐을 알 수 있었다. 메디아조의 경우 BOD제거율을 보면 F/M비 0.2~0.6까지 80%이상, F/M비 0.7~1.0은 63%이상이었다. CODcr의 경우 F/M비 0.1~0.8까지 90%이상의 제거효율을 보였으며 F/M비 0.9와 1.0에서도 80%이상의 제거효율을 보였다. 결과적으로 메디아를 사용함으로써 생물막의 비표면적도 높아지고 성장속도가 느린 미생물가지 생식이 가능하여 고농도의 미생물을 확보하게 됨으로 인해 표준활성슬러지조보다 유기물부하에 따른 처리변동의 폭이 적고 처리효율이 훨씬 좋아졌음을 보여주었다. 폐수내의 부유물질의 경우 메디아를 사용함으로써 처리효율이 좋아 침전조의 생략 가능성과 침전조 설치시 용량의 감소 가능성을 볼 수 있었다. 질소의 경우 메디아를 충전한 반응조에서 활발한 질산화 반응에 의해 표준활성슬러지조 보다 평균 20%이상으로 높게 나왔으며 인은 초기에는 표준활성슬러지조보다 높은 처리효율을 보였으나 고농도로 갈수록 급격히 낮아져 폭기조 만으로는 처리효율을 높이는데 한계가 있음을 나타내었다. The process adapt biofilm method by media to fixing micro-organism for easy opration On high-concentrate micro-organism in aeration tank. After made synthetic-wastewater like food industrial wastewater, compare madia process to activated sludge process that treatment efficiency by F/M ratio. Result of experiment that change F/M ratio from 0.1 to 1.0 kgBOD/kgMLSSㆍday, Activated sludge process become worse below 50% BOD removal efficiency under 0.1 and Over 0.8 F/M ratio. On CODcr, /F/M ratio 0.3~0.6 had beyond 80% removal efficiency but F/M ratio 1.0 has bad efficiency, 57.3%, so that showed low treatment efficiency in High-loaded wastewater. BOD removal efficiency on media process was that F/M ratio 0.2~0.6 had beyond 80% F/M ratio 0.7~1.0 had beyond 63%. On CODcr, F/M ratio 0.1~0.8 had beyond 90% and F/M ratio 0.9~1.0 had beyond 80%. Removal efficiency, too. So this paper know that we get Better removal efficiency than activated sludge by media that has more large biofilm Specific surface area and high-concentrated micro-organism. Media process has good removal efficiency in SS, it is possible that more smaller Sedimentation tank than activated sludge process. Nitrogen removal efficiency in media process in better than activated sludge process over 20%, phosphorus removal efficiency is showed better on low-concentrated wastewater than activated sludge process but similar efficiency on high-concentrated wastewater.
혼합 산업폐수의 질소제거를 위한 외부 탄소원 투입과 물질수지: 실증실험
이몽학 ( Mong Hak Lee ),안조환 ( Jo Hwan Ahn ),이정훈 ( Jung Hun Lee ),배우근 ( Woo Keun Bae ),심호재 ( Ho Jae Shim ) 한국물환경학회 2012 한국물환경학회지 Vol.28 No.5
The feasibility of enhancing biological nutrient removal from an industrial wastewater was tested with food waste leachate and sugar liquid waste as external carbon sources. Long term influences of adding external carbon sources were investigated to see how the biological nutrient removal process worked in terms of the removal efficiency. The addition of the external carbons led to a significant improvement in the removal efficiency of nutrients: from 49% to approximately 76% for nitrogen and from 64% to around 80% for phosphorus. Approximately, 20% of the removal nitrogen was synthesized into biomass, while the remaining 80% was denitrified. Though the addition of external carbon sources improved nutrient removal, it also increased the waste sludge production substantially. The optimal observed BOD/TN ratio, based on nitrogen removal and sludge production, was around 4.0 in this study.
음식물쓰레기 탈리액을 이용한 산업폐수의 생물학적 고도처리 실증실험
이병철 ( Byeong Cheol Lee ),안조환 ( Jo Hwan Ahn ),이정훈 ( Jung Hun Lee ),배우근 ( Woo Keun Bae ) 한국물환경학회 2011 한국물환경학회지 Vol.27 No.4
The feasibility of utilizing food waste leachate as an external carbon source was tested to enhance biological nutrient removal from an industrial wastewater with an average flow rate of 164,800 m3/d and a low carbon/nitrogen ratio of 2.8. A considerable improvement in the removal of nitrogen and phosphorus was observed when a certain amount of the leachate, ranging from 70 to 142 m3/d, was supplemented to the biological industrial wastewater treatment process. The addition of the leachate led to an increase in the BOD/N ratio (4.5) and the removal efficiency of nutritents from 29.7% to 71.7% for nitrogen and from 34.8% to 65.6% for phosphorus. However, an excessive dose of the leachate that significantly exceeded 120 m3/d caused serious operational problems, like oil-layer formation in the grit chamber and scum layer in the primary clarifier. Thus, an supplement of food waste leachate at a dose acceptable to an existing facilities can be a practical and effective means to enhance the nutrient removal from industrial wastewater and to dispose of the food waste leachate.