Water Resource Management

Water Resource Management

As for use of water resources, in addition to the domestic water used in the office area, most of the water resources are used for the grinding, cutting and tape manufacturing processes. As the extreme climate has occurred more frequently as a result of the climate change, the drought and rainstorm have become a climate risk concern for the operation of a business in recent years.We improve the efficiency of water resources by implementing integration of water resources, recovery of wastewater, saving measures, and emergency response mechanisms to reduce the impact on operating activities caused by unstable water resources.

 

Use of Water Resources

The Company only uses running water for our operating activities. To understand the water stress in different areas, we use the “Aqueduct Water Risk Atlas” as the tool for risk assessment to identify the water resource risks in the areas where the plants are located. According to the result of the analysis, the Hsinchu Plant, Hukou Plant and Kaohsiung Plant are located in low-risk areas and the water withdrawal of each plant is less than the average water supply by 5%, indicating that no significant impact is produced on the water sources. 

 

 

Water Resource Management and Recycling

The main sources of production wastewater in Chipbond are the wastewater containing silicon powders produced from the production of wafer bumps, grinding and cutting, the washing wastewater produced from the tape production, and the following listed in order: the acidic and alkaline wastewater, organic wastewater, domestic sewage and heavy-metal wastewater. To reduce our dependence on raw water and wastewater drainage, we spare no effort to improve the recycling rate of process water. We adopt the water resource management approaches of designing water-saving processes and performing the recycle of water resources in combination with water footprint management to reduce water resource consumption effectively.

The Results of the Key Water-Saving Initiatives Implemented in 2023

The cutting process wastewater recovery system of Kuangfu Plant has completed the expansion project, which can increase the cutting wastewater treatment capacity by 500 CMD per day. The cooling water tower system replacement project of Nanyi Plant can reduce water withdrawal by approximately 33,944 metric tons per year. The concentrated wastewater from the EDI equipment of Nanliu Plant is introduced into the recycling system, which can increase the process recycling volume by 80 CMD per day.   In the water resource recovery part, the process water recovery volume was 805,648 metric tons, and the recovery rate increased by 2.78%.

Overall, the total water withdrawal of the Company was 1,744,957 metric tons in 2023, a decrease of 12.12% from the previous year. It has dropped by 30.20% compared to the base year (base year: water intensity in 2015 was 124.6448 metric tons per million revenue).