Impact Analysis of Complex Odor from Pigsty by Using ISCST3

This study is expected to provide background data for establishing mitigation measures for malodor and for comparing complex odor criteria. The impact of malodor at the afflicted locations was analyzed using Industrial Source Complex Short Term 3 (ISCST3) model, which was recommended by the EPA. The Odor Emission Rates (ODR) for piglets and hogs were predicted based on the average, minimum, and maximum emission rates as classification. The forecasting result of the complex odor modelling of pigsty showed that tolerance limit was exceeded at an adjacent administration building, but tolerance limit was not surpassed at an afflicted location which was within 185m from the pigsty. The ISCST3 modelling of the satisfactory ODR for tolerance limit was accomplished at the administration building. From the prediction of this modelling, maximum emission rates based on 1hr at administration building were 10.59~52.93, 19.05~31.76, and 10.59 $OU/m^3/s/m^2$ at emission rates of 50%, 30%, and 10%. This emission rate was slightly higher than the tolerance limit of 10.00 $OU/m^3/s/m^2$. However, it was inferred that the tolerance limit could be satisfied if the emission rate of 10% was controlled.

ISCST3을 이용한 돈사의 복합악취 영향 분석

돈사에서 발생하는 악취로 인한 주변지역 영향을 EPA가 권장하는 ISCST3 모델을 적용하여 악취모델링을 실시하여 복합악취 기준과 비교하고 악취 저감대책을 수립하는데 기초자료로 활용하고자 하였다. 돈사 악취의 영향을 분석하기 위하여 자돈과 성돈에 따라서 평균치와 최소, 최대치로 분류하여 악취 농도를 예측하였다. 양돈장의 혼합 악취의 예측 결과에서 인접 건물들은 허용한계를 초과하나 양돈장으로부터 185m 떨어진 거리에 있는 피해지역에서는 허용한계를 만족하였다. 허용한계에 대한 악취 배출량을 확인하기 위해 관리동에서 누출량을 측정하였으며 누출량 50%, 30%, 10% 기준으로 악취 농도를 예측한 결과는 관리동에서 1hr 기준 최대 발생량이 10.59~52.93, 19.05~31.76, 10.59 $OU/m^3/s/m^2$로 수인한도 10.00 $OU/m^3/s/m^2$를 다소 초과하는 것으로 예측되었으나, 누출량을 10% 미만으로 관리시 수인한도를 만족할 수 있을 것으로 판단된다.