• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2005년도 생물공학의 동향(XVII)
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• pp.281-286
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• 2005

Biofiltration is a biological process which is considered to be one of the more successful examples of biotechnological applications to environmental engineering, and is most commonly used in the removal of odoriferous compounds. In this study, we have attempted to assess the efficiency with which both single and complex odoriferous compounds could be removed, using one- or two-stage biofiltration systems. The complex gas removal scheme was applied with a 200 ppm inlet concentration of ethanol, 70 ppm of acetaldehyde, and 70 ppm of toluene with EBCT for 45 seconds in a one- or two-stage biofiltration system. The removal yield of toluene was determined to be lower than that of the other gases in the one-stage biofilter. Otherwise, the complex gases were sufficiently eliminated by the two-stage biofiltration system.

• 한국막학회:학술대회논문집
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• 한국막학회 2003년도 춘계 총회 및 학술발표회
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• pp.31-38
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• 2003

A pilot scale biofilter pretreatment-microfiltration system (BF-MF) was operated to investigate the effect of biofilter treatment in fouling reduction of microfiltration. Biofiltration was expected to reduce the membrane fouling by removal of turbidity and metal oxides. The hollow-fiber MF module with a nominal pore size of 0.1$\mu$m and a surface area of 8m$^2$ was submerged in a filtration tank and microfiltration was operated at a constant flux of 0.5 m/d. Biofiltration using polypropylene pellets was performed at a high filtration velocity of 320 m/d. Two experimental setups composed of MF and BF/MF, i.e., without and with biofilter pretreatment, were compared. Throughout the experimental period of 9 months, biofilter pretreatment was effective to reduce the membrane fouling, which was proved by the result of time variations of trans-membrane pressure and backwash conditions. The turbidity removal rate by biofiltration varied between 40% to 80% due to the periodic washing for biofilter contactor and raw water turbidity. In addition to turbidity, metals, especially Mn, Fe and Al were removed effectively with average removal rates of 89.2%, 67.8% and 64.9%, respectively. Further analysis of foulants on the used membranes revealed that turbidity and metal removal by biofiltration was the major effect of biofiltration pretreatment against microfiltration fouling.

• KSBB Journal
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• 제17권2호
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• pp.115-120
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• 2002

Biofiltration is a bioprocess treating volatile organic compounds (VOCs) in order to convert the VOCs to harmless products. This review on biofiltration is intended to provide an engineering concept such as removal efficiency, maximum load, elimination capacity and so on. Besides, modeling concept of biofilter is also supplied for designing biofilter system. Quantitative data generated in our research group is shown to explain the engineering concept as well as the modeling idea.

• 한국축산시설환경학회지
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• 제12권2호
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• pp.85-94
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• 2006

The effects of turning frequency of in-vessel composting on ammonia emissions during composting of separated solids from swine slurry/sawdust mixtures and performance of biofiltration using the chicken manure compost were investigated. Separated solids from swine manure amended with sawdust was composted in a 226 L laboratory-scale in-vessel reactors under various turning frequency and continuous airflow (0.6 L/min.kg.dm) for three weeks. Three laboratory-scale manure compost biofilters were built to treat effluent gas from the composting of separated solid from swine manure amened with sawdust process. These experiments were continued over a period of three weeks. The composting of separated solid swine manure amended with sawdust and manure compost biofiltration system were evaluated to determine the turning frequency type that would be adequate for the rate of decomposition and compost odour reduction. The compost odour cleaning was measured based on ammonia gas concentration before and after passing through the manure compost biofilter. The average ammonia odor reduction in the manure compost biofilter was 96.9 % at R1 (no turning), 99.4 % at R2(once a day turning) and 89.0 % at R3(twice a day turning), respectively. The efficiency of ammonia reduction was mainly influenced by the turning frequency.

• 유기물자원화
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• 제8권1호
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• pp.60-68
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• 2000

바이오필터 기술은 수백 ppmC의 저농도 배가스를 처리하는 데에 있어 효과적이며, 비용이 저렴하고 환경적으로 건전한 처리방법이다. 적용범위로는 폐수처리장, 퇴비화시설, 음식물가공공장에서 발생되는 악취를 비롯하여 매립지가스 및 토양증기추출(SVE, soil vapor extraction)시 발생되는 휘발성 배가스의 처리등이 있다. 바이오필터 기술을 효과적으로 적용하기 위해서는 문헌연구를 꼼꼼하게 실시 한 후 실험실규모, 파일롯트규모, 그리고 현장규모로 점차 확대하여 실시하는 것이 바람직하다. 본고에서는 바이오필터 기술의 원리, 설계인자, 운전조건, 적용사례, 그리고 경제성 평가를 중심으로 고찰하였다.

• 한국환경과학회지
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• 제23권3호
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• pp.379-386
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• 2014

Adsorption and biodegradation performance of tetracycline antibiotic compounds such as ttetracycline (TC), oxytetracycline (OTC), minocycline (MNC), chlortetracycline (CTC), doxycycline (DXC), meclocycline (MCC), demeclocycline (DMC) on granular activated carbon (GAC) and anthracite-biofilter were evaluated in this study. Removal efficiency of seven tetracycline antibiotic compounds showed 54%~97% by GAC adsorption process (EBCT: 5~30 min). The orders of removal efficiency by GAC adsorption were tetracycline, demeclocycline, oxytetracycline, chlortetracycline, doxytetracycline, meclocycline and minocycline. Removal efficiencies of seven tetracycline antibiotic compounds showed 1%~61% by anthracite biofiltration process (EBCT: 5~30 min). The highest biodegradable tetracycline antibiotic compound was minocycline, and the worst biodegradable tetracycline antibiotic compounds were oxytetracycline and demeclocycline.

• Journal of Korean Society for Atmospheric Environment
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• 제18권E3호
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• pp.153-163
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• 2002

A laboratory- scale dual-column biofilter system was used to study the biofiltration of dimethyl disulfide (DMDS). The gas flow rate and DMDS concentration to the biofilter were varied to study their effect on the remov-al of dimethyl disulfide. Operating parameters such as pH, temperature, and water content were monitored during the biofilter operation and necessary precautions were taken to keep these parameters within the acceptable limits. It was observed that the removal efficiency of DMDS was optimal at neutral pH values. After five month op-eration, the neutralization of the filter beds with sodium carbonate became necessary for the optimum operation of the biofilters. The microbial population already present in the compost mixtures was found to be adequate in treat-ing DMDS. The compost mixtures were found to be similar in terms of biofiltration efficiency of DMDS. However, pressure drops observed in the first column compost mixture (compost/ peat mulch) was extremely high, making this compost economically not feasible. The second mixture (compost/bark) provided pressure drops within accept-able limits. A minimum residence time of 30 seconds at the optimal operating conditions appeared to be adequate for achieving high removal efficiencies (>90%).

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2003년도 춘계학술발표논문집
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• pp.331-333
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• 2003

The low-pH biofiltration system in laboratory experiments demonstrate defective performance for treating H2S. When leachate pH was in the range of 1.5 to 4, the biofilters in three different media removed H2S wi th efficiencies greater than 99％ while it was treated as a single contaminant. The posibility of using a single-stage low pH biofilter depends on its performance in treating VOCs. During Phase 2, a single-stage biofilter was effective for treating mixtures of H2S and toluene with toluene concentrations below 20ppm and leachate pH between 2 and 3.5. Biofiltration of xylene was ineffective when pH was lower than 1.5. The treatment system acclimated most slowly to benzene, and treatment of benzene was apparently subject to some competive inhibition from xylene and toluene. However. co-treatment was possible after some acclimation time. Xylene was not easily treated, with higher elimination capacities and no sign of competitive inhibition.

• 생명과학회지
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• 제10권1호
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• pp.14-21
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• 2000

음요수 중의 유기탄소의 제거수단으로써 biofiltration법의 타당성을 검토하였다.NOM에서의 생분해 가능한 분율을 알아보기위하여 행하여 졌다. UV 조사량을 3가지로 달리하였을 경우에 회분식에서의 생분해능과 비교하였다. 생물여과 반응기 실험의 경우에 생분해 특성을 검토한 결과 EBCT, 순환비 및 유입농도등과 같은 운전피라미터들이 생물여과 반응기의 생분해능에 영향을 미침을 알 수있었다. 생물여과 반응기의 유출수에서의 UV/DOC의 비는 반응기에 공급되는 원료중의 UV/DOC비에 비해 증가하였으며, 이로부터 생분해에 의해 저거된 DOC는 UV에 의해 그다지 흡수되지 않는 물질임을 알 수있었다. 본 여눅를 통해 생분해 가능한 DOC의 부분을 제거하는데 있어서 생물여과공법이 효과적인 방법이라는 것을 알수있었으며 UV처리와 bilfiltration을 연계한 공정은 수처리 시설에서 유출수의 DOC농도는 낮추는데 효과적인 한가지 방안으로 사료되었다.

• 한국동물학회:학술대회논문집
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• 한국동물학회 1998년도 한국생물과학협회 학술발표대회
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• pp.169.1-169
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• 1998

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