• Bulletin of Korea Environmental Preservation Association
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• s.412
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• pp.41-44
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• 2014

• Bulletin of Korea Environmental Preservation Association
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• s.414
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• pp.35-38
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• 2014

• Proceedings of the Korean Information Science Society Conference
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• 2011.06c
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• pp.1-4
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• 2011

악취 유발 사업장 및 지자체에서 사용하고 있는 악취 관리 모델링 시스템의 핵심 모듈을 최근 Intel에서 발표한 멀티코어(multi-core) 기술과 OpenMP 기술을 이용하여 고성능 병렬처리에 의한 실시간 시스템으로 개선하였다. 기존의 기상 모델인 CALMET 모델과 대기질 모델인 CALPUFF 모델은 배출원 갯수와 모델링 영역의 격자 갯수 증가에 따라 모델링 수행 시간이 기하급수적으로 증가한다. 악취는 그 특성상 모델링 수행시간을 짧게 할수록 악취모델링 결과를 효과적으로 사용할 수 있다. 따라서 모델링 수행시간을 단축하기 위해 여러 개의 CPU Core를 동시에 사용하여 병렬로 작업을 처리하는 멀티코어 기술을 접목하여, 기존의 CALPUFF를 실시간 모델링이 가능한 고성능 모델링 시스템으로 개발하였다. 실험 결과 Core의 수가 증가하면 Amdahl의 법칙에 준하여 가속화되었다.

• Journal of Animal Science and Technology
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• v.50 no.3
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• pp.391-400
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• 2008

Odor management is significantly concerned with sustainable livestock production because odor nuisance is a primary cause for complaint to neighbors. This study was conducted to measure the concentration of odorous compounds, odor intensity, and odor offensiveness at unit process in animal waste treatment facility combined composting and methane fermentation process by an instrumental analysis and direct olfactory method. Ammonia, sulfur-containing compounds, and volatile fatty acid were analyzed at each process units and boundary area in summer and winter, respectively. Higher concentration of odorants occurred in the summer than in the winter due to high ambient temperature. The maximum concentration of odorants was detected in composting pile when mixed manure was being turned followed by inlet, curing, outlet, and screen & packing process. Highest concentration of detected odorous compounds was ammonia ranging from 3.4 to 224.7 ppm. Among the sulfur-containing compounds measured, hydrogen sulfide was a maximum level of 2.3 ppm and most of them exceeded reported odor detection thresholds. Acetic acid was the largest proportion of VFA generated, reaching a maximum of 51 to 89%, followed by propionic and butyric acid at 1.9 to 35% and 1.8 to 15%, respectively. Malodor assessment by a human panel appeared a similar tendency in instrumental analysis data. Odor quotient for predicting major odor-causing compounds was calculated by dividing concentrations measured in process units by odor detection thresholds. In the composting process, hydrogen sulfide, ammonia, dimethyl sulfide, and methyl mercaptan were deeply associated with odor-causing compounds, while the major malodor compounds in the inlet process were methyl mercaptan, hydrogen sulfide, and butyric acid.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.41 no.5
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• pp.493-504
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• 2021

The target site, Goejeongcheon flows through downtown of Saha-gu, Busan and it connects to the Nakdong-gang estuary. But non-point pollutants and sewage sludge are partially flowing into the stream and deposited. As a result, dissolved oxygen concentrations of the stream were observed close to the anaerobic condition. Multistage Vortex Aerator was applied for restoring this urban stream. It dissolves oxygen by repeatedly causing collisions between water and oxygen by vortex flow. The changes in water quality and odor were monitored for 2 months while circulating 1 m³/min of water with 22 ppm dissolved oxygen. As a result of the operation, the dissolved oxygen was improved from slightly Bad (4)~Bad (5) to Good (1b)~Normal (3) grade, and the total phosphorus concentration was decreased by 76 % on average. In the case of complex odor, a maximum reduction of 84.5 % was observed on the day the entire river was anaerobic. Through this study, we evaluated the feasibility of applying pure oxygen and Vortex Aerator for the the stream restoration. It is expected that the results of this study can be used for full-scale design.

• Journal of Animal Environmental Science
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• v.14 no.1
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• pp.31-38
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• 2008

Ammonia gas is one of the malodorous gases from swine production facilities, such as manure storage tank, manure fermentation facilities, and livestock houses, etc. Ammonia gas from swine house is being emitted at relatively low concentrations throughout the year. Therefore, livestock facilities were continuously ventilated to supply fresh air for respiration of the animals internal the livestock facilities. The swine facilities need very high ventilation rate to control the inside environmental conditions. The deodorization system of the livestock facilities must be developed considering the ventilation rates. The odor abatement system was installed in order to improve the internal environment of the naturally ventilated growing-finishing pig house. The system which distributes the deodorized air into inner space of the swine house by using plastic duct was installed. Since the internal environment, effected by the operation of the odor abatement system, is monitored by closing the winch curtain installed on the side wall of the pig house, the experiment was practiced at the season when the internal environment becomes aggravated, winter. The effects on the improvement in the internal environment of swine house by operating the odor abatement system are as follows ; 1. By re-distributing the air which was deodorized by the odor abatement system installed in the pig house, the result showed that the concentration of ammonia gas is decreased approximately 33.3% compared with that before operating odor abatement system. 2. The effect on the pig house's ammonia gas reduction was found that the ventilation rate was less than $0.5m^3$/min head. The effect of the operation of the odor abatement system showed to be scarce when the ventilation rate increases because of the influx of external fresh air makes the quantity of diluted air more than those of the odor abatement system. 3. The perishment rate of the pigs which were brooded until slaughtering decreased about 3.8% by operating the odor abatement system in the growing-finishing pig house. Also, after operating the odor abatement system, the stinging of the eyes, suspension dust, etc were decreased when going into swine house for management.

• 월간 기계설비
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• s.117
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• pp.89-101
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• 2000

정부의 쓰레기 분리수거 자원화 및 재활용 정책에 적극 대처하고 쾌적한 생활환경과 음식물 쓰레기 수거방식 개선의 일환으로 도입된 집단주거단지의 음식물 쓰레기 감량화 설비(일명 고속발효기)가 애초의 취지와는 악취유발, 과다한 관리비 부과, 관리미숙 등의 부작용으로 무용지물이 되고 있어 국가적인 낭비를 초래하고 있다.

• KOREAN POULTRY JOURNAL
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• v.51 no.9
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• pp.115-117
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• 2019

가축의 사양관리(사육밀도 사료), 환경오염 방지, 주변 경관과의 조화 등 축사 내 외부를 깨끗하게 관리하여 악취 발생을 미언에 방지하고 가축분뇨를 신속 적정하게 처리함으로써 쾌적한 도시 농촌지역의 환경조성과 지속가능한 축산업 발전에 이바지하는 축산농장인 깨끗한 축산농장을 통해 사랑받는 축산업으로 발전하고자 하는 노력이 지속되는 가운데 깨끗한 축산농장 우수사례로 발표된 농장이 있어 본지가 경기도 용인시에 위치한 꼬꼬농장의 변연록 대표를 찾았다.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2004.05a
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• pp.99-100
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• 2004

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2010.04a
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• pp.289-290
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• 2010