● Strategy：Enhance water treatment and process water conservation efficiency.
● Goals of 2030：Paper Division reduces accumulated unit product water consumption by 10%. *Base: 2019
Cherish Water Resources
Water is an important resource for the paper industry. CLC carefully planned the use of water resources when evaluating and selecting production sites. In addition to considering policies, regulations and corporate development, we also took into account the water resources needs of surrounding residents. Valuing water resources, CLC improves water use efficiency through recycling and reuse with perfect water resources management, expansion of diversified water resources, and prevention management, and continues to introduce innovative water-saving solutions to maximize the benefit of every drop of water. In 2020, CLC's process water recovery rate is up to 96%, and the total daily process water recovery exceeds 949 million liters.Through the introduction of water-saving measures, the Paper Division reduces unit product water consumption by -1.6% annually, exceeding the previous year's target by 160%. Following the water supply situation closely, the Company continues to implement water conservation internally, plans related corresponding measures, and is committed to water conservation and recycling in the process by strengthening the wastewater discharge and classification system.
All CLC factories are equipped with the wastewater treatment system to continuously monitor the quality of the effluent and ensure that the quality of the effluent meets the legal standards. The Company also continues to promote the optimized operation of wastewater plants. In recent three years (2019-2021), a total of NT$510 million has been invested in improving wastewater improvement measures, including the installation of anaerobic treatment equipment, the optimization of tertiary treatment systems, etc. Also, we comprehensive control the conditions of process water to improve water treatment efficiency and ensure the compliance of effluent, in order to maintain nature and ecosystems, nourish biodiversity, and fix carbon to mitigate the greenhouse effect.
Groundwater, river water (surface water), and tap water are CLC’s major water sources, which are mainly for production. We value every drop of water. Besides setting up the rainwater harvest system for resource cultivation for the paper mills, we implement graded management of process water with technologies including the white water reclamation system, ultrafiltration white water system, effluent reclamation system for water reclamation, recycling, and reuse to minimize water consumption. We also introduce innovative water conservation solutions and optimize water efficiency to maximize water utilization. Currently, each drop of water is reused 12 times in some CLC mills to achieve a recycling rate of 92-96%. To manage water more efficiently, every year we complete the water balance data according to the water consumption plan of the Water Resources Agency, MOES. We also install smart meter at some paper mills to keep constant track on related water information through computer connection.
In 2020, surface water and groundwater accounted for approximately 97.54% of the total intake volume, and tap water accounted for approximately 2.46%. The total water intake volume was approximately 18,985 million liters, with a decrease of 488 million liters compared in 2019, and the total water consumption was 669 million liters. The unit product water consumption of the Paper Division reduced by 1.6% from 2019, and the unit product water consumption of industrial paper was 76 hL, with an annual reduction of 2.56%. However, as there is a wide variety of household tissue and container box products requiring complex washing processes, their unit product water consumption increased by 0.77% and 2.6% from last year respectively.
In order to properly manage the source of water intake, the Company uses the drought monitoring signal of the Water Resources Agency as the basis for judgment. When the water supply is reduced or the water supply is stopped in districts, the water consumption will be reduced in accordance with government regulations. The source of the Company's water intake is not greatly affected by the water pressure zone. If the tap water reduction happens or zoning shutdowns, the Company will take measures including: (1) Adjust tap water consumption flexibly or recycle effluent to provide process reuse, (2) Partial effluent recycling to replace clean water, (3) Process adjustment management (Schedule adaptation of papermaking and printing; process water-saving management mode) to relieve the pressure of water resources.
CLC Water Resources Flow Chart
We equip each plant and mill with an independent wastewater treatment system. The paper mills properly treat wastewater with biological treatment to ensure the effluent quality meets the relevant standards. Also, we keep implementing QC-recorder at the wastewater treatment plant to control the process water situation, in order to make optimal treatment. The box plants treat wastewater with physicochemical treatment and recover treated wastewater for use in rinsing and glue making to extensively reduce water consumption.
Implementation of water resource conservation
Supporting the “Clean Water and Sanitation”, one of the Sustainable Development Goals (SDGs) of the United Nations, CLC provides environment-friendly toilet tissue at public places, and gives assistance with cleaning toilets and sanitary facilities. The Company has adopted 60 sanitaries around Taiwan up to now. To promote environmental sanitation and implement water resource conservation, we form river patrol team, and the Houli Mill supports the “World Toilet Day - Learn from Cleaning Public Toilets” event organized by the Environmental Protection Bureau of Taichung City Government for two consecutive years.