The malodor control law enacted in 2005, regulated malodor substances ansmg from factory or service industry. In this work, an attempt is made to understand the actual conditions of malodor occurrence for types of industry and to settle trouble for a odor complaint. The odor concentration unit (o.u/㎥) of each major odor emitting industry was actualized by the indirect olfactory method including air dilution sensory test method in Korea. The industry that malodor complaint originate mainly were Chemical manufacturing industry, Waste disposal facilities and Livestock farming. As the results, Livestock farming were measured from 3 o.u/㎥ to 30 o.u/㎥ in the source boundary site, Waste disposal facilities were measured from 300 o.u/㎥ to 669 o.u/㎥ in the stack and Chemical manufacturing industry was analyzed from 300 o.u/㎥ to 1442 o.u/㎥ in the stack. Sampling of the source boundary site was demand the reform because malodor state at the field not expressed properly. In oder to solve such problem, propose total odor emission rate (T.O.E.R) introduction.

This study was performed to investigate the characteristics of indoor air quality (IAQ) in elementary and middle schools in Gyeongbuk area from July to November 2006 . The measurements of indoor air pollutants were made to cover such components as PM-10, CO2, CO, NO2, O3, HCHO, TVOC, TBC, and Radon from school classrooms. The results of this study can be summarized as follows: all of them were less than IAQ standards of Korea. The mean concentration were measured by 43.0 ㎍/㎥ (PM-10), 745 ppm (CO2), 56.1 ㎍/㎥ (HCHO), 350 CFU/㎥ (TBC), 0.026 ppm (O3), 0.6 ppm (CO), and 59.2 ㎍/㎥ (TVOC). Radon was not detected in all surveyed classrooms. The I/O ratio of PM-10 was 0.8∼1.4, while that for HCHO was 5.7∼9.0. Therefore, it was concluded that the indoor pollution of formaldehyde was very serious in classroom.

In this work, an attempt is made to understand the actual conditions of malodor occurrence for industrial complex area and to settle trouble for a odor complaint. Odor emission sources were sorted into point source and area source group. The odor concentration unit (o.u/㎥) of each major odor emitting industry was actualized by the indirect olfactory method including air dilution sensory test method in Korea and triangle odor bag method in Japanese. As the results, Night-soil disposal plant were measured by the highest of 2,097,992.6 o.u/㎥, and wastewater incinerator plant was analyzed by 315,022.5 o.u/㎥, and food company was analyzed by 210,864 0.u/㎥, and paper products plant was detected by 195,525 o.u/㎥ and chemical product was detected by 13,761.6 o.u/㎥. To evaluate how well the evaluation result of odor made by induced odor concentration (o.u/㎥) can explain the actual odor phenomenon, it was used as the input data of air pollutant diffusion model (ISCST 3) to set model operation time as one hour in consideration of the characteristics odor varying with weather condition at any time. It was confirmed that 2.0 degree of odor intensity could be detected at the neighboring area of industry complex area and 1.7 degree of odor intensity could be detected at the neighboring domestic area. Accordingly, the evaluation result by induced odor concentration (o.u/㎥) could precisely explain the current status of the field with odor problem and sufficiently be used as inputting data for air pollutant diffusion model.

As a typical example of simultaneous analysis of the odorous compounds, the volatile organic compounds from inventory sources in Seongseo industrial area were concentrated and analyzed with thermal desorber/GC/ MSD, and major malodorous compounds were estimated. Odor intensity and odor concentration was analyzed simultaneously During a period from November in 2002 to December in 2003, this study was conducted to evaluate malodor emission characterization in major treatment facilities. The major components were Dimethyl sulfide, Dimethyl disulfide, Methyl mercaptane, Ammonia, Benzene, Toluene, m,p-xylene, o-xylene, Styrene, 1,2,4- T.M.B and 1,3,5-T.M.B. Among the six major inventory sources, the odor unit concentration of Night-soil disposal facilities was the highest, 669～2344 ou/m3.