The purpose of this research was to study treatment characteristics of main odor substances, such as Trimethylamine and Acetaldehyde, by using 600 Wand 200 W microwave plasmas. Ar and air were used as plasma gases and a cylindrical SiC/Zeolite filter having several Ø 2~3 ㎜ size holes was used as a trigger to obtain a stable plasma even with a relatively low microwave power. The 600 W Ar plasma was used to destroy relatively high concentrated TMA and acetaldehyde from 500 ppm to 2200 ppm and their DREs (Destroy and Removal Ratios) were measured. The 200 W air plasma was also used to measure DREs for TMA and acetaldehyde Jowly concentrated in 4.5 odor strength. The results demonstrated that the Ar plasma produced 70% to 90% efficiency in removing odors substances. The 200 W Air plasma, which was operated at the relatively lower energy level, produced 90% or even above higher efficiency for the odorous materials. It was expected that the air plasma was effectively used to control odorous materials emitted from relatively a small size plant process.

In this study VOCs and odors in ambient air of the Wanju industrial site and a regional area were measured to build up a data base and predict the effect of them on the ambient air quality of the near regional area. Emission characteristics were examined by measuring odors and VOCs from the main emission sources sorted by the categories of industries. Three emission points were selected for odors and five points were for VOCs. VOCs in ambient airs of the industrial site and outside regional area toward the wind direction were also measured continuously during three days per a season for a year and the effect of the VOCs emitted from the industrial sites on the ambient air of the near regional area were evaluated. GC-PFPD, HPLC, and GC-FID were used for measuring sulfur compounds, aldehyde, and trimethylamine among odorous compounds and GC-MSD was used for VOCs. As the main results of this study, toluene, benzene, xylene, styrene, ethyl benzene, 1,3,5-trimethylbenzene and 1,2,4-trimethylbenzene were detected as main volatile organic compounds in this area. Hydrogen sulfide, trimethylamine and acetaldehyde were main detected species the odorous compounds.