Water Resource Management

Surpassing Water Resource Standards through Continuous Innovation and Breakthroughs.

Water resource risk is evaluated by AUO to avoid being affected by heavy rains or droughts caused by climate change. Water-saving technologies have also been developed to reduce water consumption and monitor water quality automatically. We strive to comply with the law and reduce our environmental impact even further.

Reduce level of dependence on water resources Improve production water recovery rate Develop a range of water reclamation resources Innovative water treatment technology

Improve production efficiency, reduce consumption of natural water resources, and reduce level of dependence on water

Effective circulation and separation for treatment for further concentration and reclamation to improve water recovery rate

Develop a range of water resources to strengthen resilience and adaptation to extreme climate risks

Use high-level treatment technology developed and integrated in-house To achieve zero wastewater discharge and eliminate the environmental burden on waterways

Water consumption reduced by
45
Production water recycled is
91 % per day
Water reclamation over
 6,000 tonnes/day
100% recovery of production water at
Longtan 1st fab
Water Resources Use and Water Saving Goals
Water Conservation Outcomes in Past Years

Continuing to improve water recycling rate through optimization of water-saving technology

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Continuing to improve water recycling rate through optimization of water-saving technology

An assessment was undertaken to see if the water recycling standard can be met under the existing system structure in order to increase the overall amount of water recycled throughout the site. Take example of Tainan site , the main action taken was testing the water quality of the recycling tank, so that cleaner reclaimed water could be directed to the industrial tank for re-use. This helped to mitigate the problem of insufficient tank capacity as well. The operating time of the resin column was also extended to reduce the frequency of resin column regeneration and the amount of water used for regeneration. The move successfully reduced the amount of wastewater discharge and tap water usage.

Water recycling rate
increased to 90.5 %
Tap water usage
reduced by 20.7 %
Wastewater
discharge reduced 20.7 %

Increasing water recycling by introducing new materials

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Increasing water recycling by introducing new materials

A new water-saving technology was implemented with a new type of super-filtration membrane installed in the bio-recovery system. The flux rate at the Taichung Plant was increased by 20% by using the new membrane while the pressure differential remained the same.

Amount of water recovered the Reverse Osmosis (R.O.) system
increased by 300,000 tonnes
pressure difference
0.3 Kg
Flux rate
increased by 20 %

Optimizing water utilization through a rainwater recovery system

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Optimizing water utilization through a rainwater recovery system

The design and planning of the conduits piped rainwater from the roof of the factory as well as steam condensate to the rainwater or factory water tanks for storage. The stored water can then be used for flushing toilets, watering the gardens or hosing down the roads.

100% recovery of production rate

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100% recovery of production rate

The innovative water reclamation system developed and integrated by AUO is a total production water recycling system that recovers 100% of the production water used at the Longtan plant. The combination of separates at the source and different recovery methods reduces production water consumption at Longtan plant by up to 98%. Zero-discharge is then achieved using high-efficiency thermal recovery and evaporation equipment. The 18,000 tonnes of daily water consumption can then be completely recycled for re-use within the plant, reducing the environmental burden and impact on the waterways.

Whole procedures of process recycle water
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