Water Resource Management
Three-stage risk assessment
To gain insight into water risks at our facilities worldwide, we conducted the three-stage analysis and assessment of water resources risks:
Water withdrawal and resuse
ASEH has adopted three water-use strategies—reduce, reuse and recycle. Total water withdrawals in 2019 amounted to 24,177,331 tons*, with the largest source of water being tap water*. Our facilities record water use with water meters and water bills. This year, in order to differentiate between different water sources, some of our facilities have begun measuring total dissolved solids (TDS) in addition to total water withdrawals. In 2019, ASEH recycled approximately 28,150,000 tons* of water, which accounted for 116% of the total water withdrawals of the year. Our primary water recycling methods are ultra-filtration systems, chemical mechanical polishing (CMP) wastewater recycling, and reverse osmosis (RO) water recycling. We also harvest rainwater for scrubbing towers and cooling towers.
Waste water management and control
In 2019, 18,780,000 tons* of effluent was discharged* at ASEH facilities, with the discharge of effluents into surface and groundwater accounting for 93% of total effluents discharged, and the discharge of effluents into marine waters accounting for 7%. ASEH has adopted an effluent management system more stringent than that stipulated by law and regularly/continuously monitors effluent water quality to safeguard local bodies of water from negative environmenta impacts. We commissions external service providers to conduct quarterly offline sampling and water quality analysis, and the company's internal environmental protection lab conducts further water quality tests on waste water. The purpose of these measures is to improve the monitoring and management of effluent discharge and ensure regulatory compliance. This year, some of our facilities have adopted the measurement of TDS in water discharge in order to differentiate between water sourced from freshwater and other environments.