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.

Purpose - The purpose of this study is to apply a cost effective ultrasonic odor reduction method that generated micro-bubbles using ejector to the Southeast Asian wastewater market. Research design, data, and methodology - A leather maker located in Ansan-city, Gyunggi-do, South Korea was sampled from the collection tank to select experimental materials. Experimental setup consisted of circulating water tank-air ejector-ultrasonic device, and circulating wastewater. Sample analysis was performed by CODcr, T-N, T-P, and turbidity by the National Environmental Science Institute. Results - Experimental results show that it is most effective in removing odors when the frequency range of ultrasonic wave is 60∼80 Khz and the output is 200 W. It showed that the concentration of complex odor dropped from a maximum of 14,422 times to a minimum of 120 times. Also, analysis of ammonia and hydrogen sulfide in specific odor substances has shown that they were reduced from 1.5 ppm to 0.4 ppm and from 0.6 ppm to 0.1 ppm, respectively. Conclusions - It is possible to shorten more than 12 hours in the treatment of micro-organisms. It can be seen that the processing time of odor after ultrasonic treatment in the pre-treatment facility is reduced by 25% when compared to the resultant micro-organisms after the chemical treatment, that is, the time of the bio-treatment of micro-organisms. Based on the results, it was confirmed that the pre-treatment method using the ultrasonic and the air ejector device of the experiment shows the effect of reducing the water pollutants and odor more effectively in a relatively short time than the conventional advanced oxidation method.