Water recycling and Water Resources Development

CSC has abundantly invested of wastewater treatment and reclamation techniques for water conservation and cost reduction. The goal is to optimize water recycle and reuse to achieve the strict water reuse standards applied in some countries, where the water resource is extremely deficient, such as Israel and Singapore.

A large quantity of demineralized water (DMW) is used to rinse the remaining acid and alkali on the strip surface for high production quality in the CSC electrolytic galvanizing line (EGL). The wastewater was discharged into the cold rolling mill wastewater treatment plant. For water reclamation, CSC has developed an economic and appropriate process and constructed a treatment plant with capacity of 786 m3/day and 70% recovery rate to treat the selected EGL wastewater streams for DMW production, which can reduce EGL production cost and achieve the goal of wastewater reclamation in CSC.

The process of wastewater reclamation and reuse in EGL

CSC also adequately invested in the development of municipal wastewater reclamation. CSC has constructed a pilot plant with a production rate of 21 m3/day for the wastewater reclamation using the secondary effluent from Fong-Shan River municipal wastewater treatment plant. The quality of reclaimed water achieves CSC requirement. In addition, CSC will develop low-cost seawater desalination techniques, construct a pilot plant, and conduct various tests to evaluate the feasibility using desalted water as cooling and process water in CSC.