Environmental Sustainability｜Air Pollution Control

                     Air Pollutant Emissions

       Committed to continuously reducing pollutant emissions, Nuvoton complies with government regulations and refers to international laws for air pollution control and emissions. Nuvoton’s main air pollutants are produced by the production process and include volatile organic compounds (VOCs), nitrogen oxides, sulfur oxides, ammonia, chlorine, hydrochloric acid, nitric acid, and phosphoric acid. The strategy for managing air pollutants involves first conducting source control, optimizing processes to reduce the concentration and volume of exhaust gases, and then treating them according to their characteristics. All air pollutant treatment systems operate 24 hours a day, year-round, with continuous monitoring to ensure normal operation. The following details the treatment methods for different types of exhaust gases in the air pollutant treatment system:

1.For general acidic and alkaline exhaust gases, they are discharged to the central exhaust scrubber for neutralization treatment.

2.Some flammable, toxic, and FCs exhaust gases first undergo high-concentration effective treatment at the process equipment end through local scrubbers using adsorption, combustion, electric heating, or scrubbing facilities to reduce hazards, then are discharged to the central exhaust scrubber for neutralization treatment.

3.Exhaust gases containing volatile organic compounds are first adsorbed by a zeolite rotor and then incinerated in a direct-fired oxidizer; high-boiling-point organic exhaust gases are treated by condensation collection using temperature differences.