OTIZ installed a new wastewater system to eliminate wastewater discharge from the production process. The system directs wastewater to the biotreatment and the water reclamation system. After satisfying required standards as usable water, it is recycled for the machine shop to replace tap water used for scrubbers. After communicating with governmental agencies, including the environmental protection department, OTIZ received approval to collect and send production wastewater from South Plant to be treated at North Plant. The design optimized system efficiency and made zero wastewater discharge a reality. The new system reduced water withdrawal by 26,712 kL, which saves approximately NT$476,000 in water withdrawal fees and approximately NT$1 million in wastewater discharge fees paid to suppliers. Most importantly, the system achieves the ultimate goal of protecting the environment.