In this study, we evaluated the filtering effect of the fine dust mask. Our objective research has secured credibility in the private sector. The performance of domestic fine dust masks is evaluated by three dust collection efficiencies, inspiratory resistance, and leakage rate according to KF grade in the health mask standard guidelines issued by the Ministry of Food and Drug Safety. Based on this, eight types of fine dust masks were evaluated for dust collection efficiency and face intake resistance. All masks showed good performance as the collection efficiency was 90%. The higher the KF grade, the higher the collection efficiency, but the inspiratory resistance had no correlation with the grade. According to the manufacturer's operation method, masks below the standard value may be distributed. Masks that are currently on the market have shown results that can be trusted. However, we hope that the system will be improved to validate whether the masks that meet the threshold are still being distributed.

The purpose of this study is to investigate and compare the change of wind velocity and processing efficiency of sulfuric compounds and more complex odors. The research was conducted in a facility specializing in odor prevention applications using upgraded existing research equipment (from 30 CMM to 200 CMM) on wastewater treatment. The research equipment was installed with the purpose of removing odor from the wastewater treatment (Pasteur Factory) located in Hoengseong-gun, GangWon. To investigate the treatment efficiency of hydrogen sulfide test samples were evaluated with different blower installation positions and changes in wind speed. The wind speed at the static pressure is about 1.70~2.08 times faster than that of the static pressure, although the blower power is different. The efficacy of sulfur compounds and complex odor treatment was 91.27% and 95.20%, respectively. The study results show that it is necessary to review the design point of wind speed due to the increase in facility scale. In addition, considering the characteristics of complex odor, it is necessary to consider additional surcharges. It was determined that the facility plan for odor prevention in relation to wind velocity will be reexamined. Ongoing research will also be considered to help identify any disadvantages and solutions for the ventilator positioning, which is currently installed in the back.

This study investigates ventilation and processing methods for industrial facilities by analyzing the distribution chart and concentration of fine particles generated. Analyses of fine particles were conducted in crushing rooms, sorting room, Primary manufacturing room and packing room, where the concentration of 0.3~10.0 μm particles were measured for 10 minutes during processing of herb medicines. The result revealed that particles with sizes greater than or equal to PM2.685 took up most of the space, and the concentration of fine particles (PM10) was 1,672.24 μg/m3 in 1th crushing room, 3,144.7 μg/m3 in crushing 2nd room, 262.45 μg/m3 in sorting room, prior to processing (2,302.3 μg/m3 for Aralia continentails and 5,564.9 μg/m3 for Poria cocos), 4,656.5 μg/m3 in Primary manufacturing room, and 20,213.3 μg/m3 in packing room. The concentration of fine particles generated during manufacture of herb medicines was, in comparison to the standard of 150 μg/m3 established in the Indoor Air Quality Control Act, 1.7 to 135 times higher. High concentrations of fine particles were found in all rooms, except for packing, even with partial ventilation. Also, it can be inferred that adequate deodorization system may be required in order to control unpleasant herb odors. Through this study, it is recommended that the use of scrubbers and concealment may facilitate control of fine particles containment.

The purpose of this study is to confirm the removal effect of odorous gas through the multi process. The combination of Scrubber, UV and Adsorption was analyzed using the odor gas of reservoir. Analysis was carried out for six times in total and collection was made once per each process. Sampling was performed in the afternoon during August (1:00 pm~4:00 pm). Multi process has been designed to facilitates the accessories exchange. The advantage is that it facilitates the replacement of the activated carbon and it is convenient to change the type of chemical according to the type of pollution materials. As a result, for odor gas removal efficiency, ammonia 91.8%, trimethylamine 72.0%, hydrogen sulfide 99.9%, methyl mercaptan 99.9% were removed respectively. Removal efficiency of the process is the scrubber (alkali), activated carbon adsorption, scrubber (acid) and UV procedure from the highest order. Further studies on the operating method and efficiency of multi process by the change of wind speed and chemical are recommended.