Now a days, people interest in environmental pollution and attempt to improve the indoor air quality contaminated with various pollutants since it is very important to construct healthy and comfortable living environment. From the past Malodor problem is present and many complaints occurred in Korea. So the various malodor removing methods have been developed for commercialization. However, there are some drawbacks complements malodor removal techniques, it is a need of improve the malodor removal techniques.
Malodor removing method using a photocatalyst have some advantages that does not generate secondary pollutants and stable.
For this reason, malodor removing method using a photocatalyst has been used many ways and various studies are in progress. In this study, we used the advanced oxidation process (AOP). In this technology we used an infrared (IR) lamp in the existing air purification system to increase the reactivity of the malodorous substances with OH radicals for oxidation reaction and confirmed the removal characteristic on several kinds of parameter that IR lamp on-off, injection concentration and configuration of malodor.
First, when removing the single malodorous substances, the removal efficiency decreases with increasing the injection concentration of malador when IR lamp is turn off. The removal efficiency of maldor substance at least 90% when the IR lamp is on at ammonia at least 22.1 % , hydrogen sulfide at least 9.5% and formaldehyde increase at least 25.6%. Hydrogen sulfide has low effect on removal efficiency when the IR lamp is turned off as compared to other malodor substance. Second, in removing malodor at the industrial field, the removal efficiecny of malodor is more high when the IR lamp is on due more reaction of anions and malodor while the efficiency is low when the IR lamp is turned off. Therefore, by using the photocatalyst for removing malodorous substances, the effect of infrared rays, the higher reactivity between the OH radicals and the malodorous substances, it is possible to improve the malodor removal efficiency because oxidation reaction occurs frequently.