Powerchip Semiconductor Manufacturing Corp.(PSMC) is the first semiconductor factory in the park that promises a process water recovery rate of more than 85% (the process water recovery rate was 86% in 2018; and the average water usage per drop is up to 3 times). Since the establishment of the factory, it has maintained excellent water savings. Even with continuous technological improvement and equipment investment, water-saving work is our mission. As an environmentally friendly facility, PSMC's response to the ammonia nitrogen reduction requirements is to still insist on using the high-cost, but high-safety and zero-waste method of catalyst construction to reduce ammonia nitrogen. In addition to reducing the ammonia nitrogen load in the lagoons, PSMC can achieve a no sludge result from the wastewater treatment, greatly reducing secondary damage to the environment. In cooperation with the Science Park Administration, the company will continue to promote, share, and explain this plan, its concept, and results to other people and groups.
PSMC's process wastewater is pre-treated by the in-plant wastewater plant, and then enters the park wastewater treatment plant for subsequent treatment and discharge. In order to master the treatment results of different components, depending on the type of liquid discharge, concentration, conductivity and other characteristics of the process, The split is treated in 19 different water systems. In addition to increasing the water recovery rate, some of the waste acid (phosphoric acid/copper sulfate/sulfuric acid/hydrofluoric acid)/organic waste liquid (IPA/PGMEA/TMAC) are still recycled. Economic value, separate diversion can not only reduce the dosing amount of the wastewater plant, but also reduce the difficulty of disposal of the back-end waste.