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액상 첨가제 살포 방법에 의한 밀폐형 돈사에서의 분진 저감 평가
김기연,고한종,김치년,Kim, K.Y.,Ko, Han-Jong,Kim, C.N. 한국축산환경학회 2008 축산시설환경학회지 Vol.14 No.2
본 연구는 지금까지 활용되었거나 새로이 제안된 액상 첨가제를 돈사에 살포하여 분진 농도의 경시적 변화를 관찰하여 제거 효과에 대해 객관적으로 비교 평가하기 위한 것으로 다음과 같은 결론들을 도출했다. 1. 살포 전 밀폐형 돈사내 분진 농도는 다른 연구자의 결과와 비교시 전반적으로 낮았다. 2. 온도의 경우는 살포 후 24시간까지 돈사 내부와 외부 큰 차이가 없었으나, 상대습도는 살포 후 1시간까지 증가하여 외부와 약 10% 가량의 차이를 보였다. 3. 평가대상 모든 액상 첨가제들의 살포직후 분진 평균 저감율은 살포 전 농도 대비 약 30%로 나타났다(p<0.05). 4. 살포 3시간 이후부터는 콩기름을 제외하고 다른 액상 첨가제들의 분진 농도에 대한 경시적 저감 효과가 관찰되지 않았다. 5. 평가대상 모든 액상 첨가제들 중 콩기름의 살포가 제거 효율성 및 안전성 측면 모두 돈사 분진 제어에 대해 가장 효과적인 첨가제였다. Appropriate air quality in the pig building is essential to prevent farmers' health as well as to increase pig performance. This on-site experiment was conducted to assess dust reduction efficiencies of several liquid additives with spaying method in the enclosed pig building. The mean reduction rate of total dust only after spray was approximately 30% for all the treatments compared to initial level before spraying additives, which was found to reduce the initial level of total dust significantly (p<0.05). The mean reduction rate of all the treatments at 1hr after spray was about 24% which was 6% lower than only after spray. Since 3hr after spray, however, total dust level were fluctuated variably for all the treatments besides application of the soybean oil. Based on this result, effect of soybean oil on dust reduction in the enclosed pig building was most prominent among liquid additives evaluated in terms of efficiency and duration.
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김기연,최홍림,고한종,김치년 한국동물자원과학회 2004 한국축산학회지 Vol.46 No.2
Air quality in the livestock waste compost pilot plant at the Colligate Livestock Station was assessed to quantify the emissions of aerial contaminants and evaluate the degree of correlation between them for different operation strategies; with the ventilation types and agitation of compost pile, in this study. The parameters analyzed to reflect the level of air quality in the agitation of compost pile, in this study. The parameters analyzed to reflect the level of air quality in the livestock waste compost pilot plant were the gaseous contaminants; ammonia, hydrogen sulfide, and order concentration, the particulate contaminants; inhalable dust and respirable dust, and the biological contaminants; total airborne bacteria and fungi. The mean concentrations of ammonia, hydrogen sulfide, and odor concentration in the compost pilot plant without agitation were 2.45ppm, 19.96ppb. and 15.8 when it was naturally ventilated, and 7.61 ppm, 31.36ppb, and 30.2 when mechanically ventilated. Those with agitation were 5.50ppm 14.69ppb, and 46.4 when naturally ventilated, and 30.12ppm, 39.91ppb, and 205.5 when mechanically ventilated. The mean concentrations of inhalable and respirable dust in the compost pilot plant without agitation were 368.6㎍/㎥ and 96.0㎍/㎥ with natural ventilation, and 283.9㎍/㎥ and 119.5㎍/㎥ with mechanical ventilation. They were also observed with agitation to 208.7㎍/㎥ and 139.8㎍/㎥ with natural ventilation, and 209.2㎍/㎥ and 131.7㎍/㎥ with mechanical ventilation. Averaged concentrations of total airborne bacteria and fungi in the compost pilot plant without agitation were observed to 28,673cfu/㎥ and 22,507cfu/㎥ with natural ventilation, and 7,462cfu/㎥ and 3,228cfu/㎥ with mechanical ventilation. They were also observed with agitation to 19,592cfu/㎥ and 26,376cfu/㎥ with the natural ventilation, and 18,645cfu/㎥ and 24,581cfu/㎥ with the mechanical ventilation. It showed that the emission rates of gaseous pollutants, such as ammonia, hydrogen sulfide, and oder concentration, in the compost pilot plant operated with the mechanical ventilation and with the agitation of compost pile were higher than those with the natural ventilation and without the agitation. While the concentrations of inhalable dust and total airborne bacteria in the compost pilot plant with the natural ventilation and with the agitation, the concentrations of respirable dust and total airborne fungi in the compost pilot plant with the mechanical ventilation and agitation were higher than those with the natural ventilation and without the agitation of compost pile. It was statistically proved that indoor temperature and relative humidity affected the release of particulates and biological pollutants, and ammonia and hydrogen sulfide were believed primary malodorous compounds emitted from the compost pilot plant.
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김기연,최홍림,김치년 한국동물자원과학회 2002 한국축산학회지 Vol.44 No.2
본 연구에서는 한강유역에 위치한 축분퇴비공장의 작업환경 조사를 위한 현장 평가로서, 설문조사 및 악취물질 측정을 통해 근로자들의 작업환경 만족 수준과 이에 영향을 주는 요인들을 규명하였다. 연구결과, 축분퇴비공장 근로자들의 작업환경 만족도에 영향을 주는 요인들로 일반 건강수준, 악취, 작업량, 분진, 흡연으로 조사되었으며, 이 중 일반 건강수준, 악취, 작업량이 전체 작업환경 만족도의 61.3%를 대변하는 것으로 나타났다. 통계적 유의성을 나타낸 작업환경변수로는 일반 건강수준(p<0.01), 악취·작업량·분진(p<0.05) 등 이었다. 결론적으로 일반 건강수준이 높은 근로자일수록 작업환경 만족도가 높았으며, 작업량이 상대적으로 많고 악취와 분진에 쉽게 노출된 공장의 근로자일수록 작업환경 만족도가 낮은 것으로 분석되었다. 흡연을 하는 근로자는 작업환경 만족도가 낮게 나타났으나, 통계적 유의성은 없는 것으로 분석되었다. 따라서 한강유역 축분퇴비공장 근로자들의 작업환경 만족도를 제고시키기 위해서는 공정 중 악취와 분진농도의 발생을 저감시켜야 할 것으로 판단된다. 그러므로 축분퇴비공장의 악취 및 분진농도의 발생을 최소화할 수 있는 처리공정 및 관리체계 정립이 시급하며, 이는 궁극적으로 축분퇴비공장 작업자의 건강 뿐만 아니라 주변 마을 정주민의 생활환경개선효과를 유발할 수 있다. This study was executed to elucidate the degree of satisfaction with working environment and the factors affecting it for workers who are engaged in the composting plants with livestock manure in the Han-river watershed. As an evaluation on site, we applied the self-administered questionaire including general characteristics, working conditions, degree of satisfaction with working environment, and degree of satisfaction with working condition. Simultaneously, we analysed the exposure levels of odor (ammonia, hydrogen sulfide, and odor intensity) in the boundary area of plants. As a result of the study, health condition, odor, work load, dust, and smoking were proved to be the main factors affecting the degree of satisfaction with working environment for workers who are employed in the composting plants with livestock manure in the Han-river watershed. Of them, it was investigated that health condition, odor, and work load accounted for 61.3% of the total degree of satisfaction with working environment and health condition(p<0.01), odor(p<0.05), work load(p<0.05), and dust(p<0.05) were statistically significant. It was concluded that the degree of satisfaction with working environment was high for the workers who had good health status and low for the workers who had the relatively considerable work load and were often exposed to odor and dust. Therefore, to increase the degree of satisfaction with working environment for workers who are engaged in the composting plants with livestock manure, the measures that can reduce the exposure levels of odor and dust emitting from the composting plant with livestock manure should be improved.
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