Air Pollutant Control
The air pollutants produced in the PCB manufacturing process mainly include acid, alkaline waste gas, and volatile organic waste gas. All of them can be treated by high-efficiency air pollution prevention and treatment equipment so that the pollutant content detected by Unimicron over the years is lower than the government’s environmental protection laws and regulations. In 2022, sulfur oxide emission was reduced by 51% compared with 2021, mainly due to the difference caused by a fire in 2021, which was reported as leakage in accordance with the requirements of the Department of Environmental Protection. Emissions of volatile organic compounds from the Taiwan plant increased by 19% in 2022 compared to the previous year as the process lines and raw material types increased, which was mainly due to the change in the calculation of emissions from some plants. Total air pollution emissions per unit of revenue averaged 3.5 kg/million revenue in 2022, a 13% decrease from the previous year.
Air Pollutant Emissions and Intensity
Note: In 2020, the plants in Taiwan changed the emission calculation method in response to the request of local environmental protection authorities, resulting in an increase in the value.
