Air Emissions Management
Our efforts to minimize the environmental impact of emissions from semiconductor manufacturing don't end with complying with regulations set forth by the local governments in which we operate. For example, in the Republic of Korea, the DS Division operates pollution prevention facilities to mitigate the impact of air pollutants and processing facilities to minimize emissions. Through these efforts, we have reduced the emission of pollutants by 70% compared to 2001.
Real-time Management through
Smokestack Automatic Measuring Devices
To efficiently operate air pollution prevention facilities and to immediately resolve problems, we measure air pollutant levels emitted from our plants by using smokestack automatic measuring devices in real time. We strictly control pollutant emission density at less than 30% of the acceptable limit and transfer measurement data to administrative agencies in real time.
Chemical Substance Emission Control
The DS Division annually inspects chemical substance emissions. We inspect and closely manage the volume of chemicals emitted into the environment (air, water, and soil), including those contained in wastewater and solid wastes.
The amount of chemical substances used increased 7.3 times in 2012, as compared to 2001. However, through continuous investment in air pollution prevention facilities and process improvements, environmental emissions decreased by a staggering 24% during the same period.
Signatory to Voluntary Agreement
The Giheung site signed a voluntary agreement (30/50 Program) for chemical emissions reduction with the Han River Basin Environmental Office on June 25, 2009. The agreement is a program among businesses, civic groups, and the government to reduce chemical emissions by 30% in 3 years and by 50% in 5 years, respectively.
Isopropanol (IPA) emissions comprise the largest portion of emissions from the Giheung factory. We have cut IPA emissions by 30% in 2011, and we plan to increase that amount by 50% by 2013 compared to 2007 levels through optimizing the efficiency of the emissions treatment system and improving the manufacturing process.
Example of Chemical Emissions Reduction
Improvements in emissions treatment systems:
- Improved treatment efficiency by introducing multi-scrubbers
- Improved nozzles and fillers of current scrubbers
- Constructed deodorization tower at the wastewater treatment facility
Reduced the usage of:
- Ammonia by improving processes
- IPA by using a substitute
- Methanol by recycling waste IPA as a carbon source
Reduction of waste movement:
- Reduced waste movement by returning chemical containers back to suppliers for reuse.
Waste Water Management
In an effort to minimize the environmental impact on streams into which waste water is discharged, and to protect aquatic ecosystems, Samsung Electronics' Device Solutions Division minimizes its emission of water pollutants, adheres to an in-house pollutant standard that is stricter than legal requirements (30% lower than the law stipulates) and operates TMS (Tele Monitoring System) to monitor the concentration levels of pollutants around the clock.
BIO TMS for monitoring discharge water
To promote a green enterprise and preserve the environment, the Device Solutions Division of Samsung Electronics has also constructed its first enterprise ecological toxicity monitoring system to measure and monitor the ecological toxicity of final effluents from its plants.
From 2005 to 2013, Samsung Electronics' Device Solutions Division reduced water pollutant discharge intensity by 51% compared to 2005. To alleviate the increase in water pollutant emissions caused by line expansions at the Hwaseong facility, a specialized total nitrogen treatment facility (N-Free) was established in 2008 and a new waste water treatment facility was constructed in 2012. As a result, this two-tier treatment system and waste water reuse system was introduced, and a acid/alkali wastewater system has reduced the total discharge of water pollutants by lowering the final treated concentration of water pollutants.
In an effort to protect water resources, approximately 40% of the industrial water is recycled. In 2013, a wastewater Reclamation and Reuse System was implemented to maximize the use of water resources.
The temperature of discharged water is strictly managed to meet legal requirements. In addition, a water cooling facility was constructed to protect the habitats of tropical fish in the streams, where they can be otherwise impacted by a steady influx of discharged waste water at a constant temperature.
The water cooling facility lowers water temperature through heat exchange with cold water that requires a heat source. Its benefits include energy savings for water heating.
Especially during winter, the water is cooled to below 10°C to minimize its impact on water quality and the aquatic ecosystem.