Water Resources Management at BenQ Materials

June 29, 2021

As global climate change disrupts the water cycle, droughts and water scarcity have become prevalent business risks. A major challenge facing the manufacturing industry is its high reliance on large amounts of water, either directly or indirectly, for the manufacturing process. To maximize the efficient use of every drop, it is necessary to develop and implement water recycling practices and water-saving policies.

At BenQ Materials, a water saving and recycling program focusing on four major consumption areas is in place to achieve the sustainable use of our water resources. These focus areas relate to domestic water, processed water, the cooling tower, and water from the boiler. The three key initiatives described below were developed to put the program into action and align it with our goal of reaching a 90% water recycling rate.

Water source management
A Facility Monitoring and Control System (FMCS) is used to track the water supply status in real-time as well as the overall wastewater system in order to further analyze, review and optimize the settings. Induction faucets and water-saving taps have been installed to significantly reduce domestic water usage by up to 894 m3 per year. A rain recovery system is used to collect rainwater and re-purpose it for flushing toilets, watering gardens, and other utility services.

Production water recovery rate
The cooling tower uses recycled condensate and reverse osmosis (RO) reject water as a source of evaporator cooling water, which saves 105,850 m3 of water per year. Variable-frequency control devices are added to reduce carrier conveyance for reduced vaporization and dissipation losses. Recycling of condensate water and additional circulation are employed in boilers to reduce the use of water by 26,382 m3 per year. To further increase the overall amount of water recycled throughout the plant, recycled water quality is tested and imported to a Reverse Osmosis Recovery (ROR) tank so that reclaimed water is directed to the ROR system for re-use, which further reduces consumption by 55,188 m3 per year. 

Optimization of wastewater resource utilization
Our ecological pool follows best practices for wastewater utilization. Prior to using recycled water, the pool required approximately 20 m3 of water to be replaced daily; the replaced wastewater was then discharged. With new modifications, our ecological pool uses not only recycled water, but also circulates the water into the recycling system for full recovery, which cuts consumption by 7,300 m3 per year.

Water is essential and affects people’s daily lives. In addressing the issue of global water scarcity, BenQ Materials’ efforts to mitigate its environmental footprint has had a tangible impact on the local community. Since 2014, we have held annual beach-cleaning events and taken charge of preserving a 6 km stretch of the Nankan River in Taoyuan to improve the water environment. Regulating water management not only preserves biodiversity but is also a positive response to climate change.