Water Resource Preservation


Asahi Kasei Group's business is intrinsically related to water resources. Ensuring their future viability is one of our societal missions and a prerequisite for the continuity of our business. We will contribute to the conservation of water resources around the world through our domestic and overseas water purification membrane module business, seawater desalination business, the development of sludge reduction products for wastewater treatment, and the expansion of our surface oil detector series. We also have a policy of ascertaining the quantity of our water intake while striving to maintain and improve the efficiency of our water usage.

Reducing water use

The Asahi Kasei Group endeavors to reduce the amount of water used in our plants and to make efficient use of water by recycling it.

  • Amount of Global Water Intake FY2017 282 million m3, FY2018 307 million m3, FY2019 268 million m3, FY2020 255 million m3, FY2021 267 million m3
    Amount of Global Water Intake
  • Industrial water+Ground water+Municipal waterFY2017 266 million m3, FY2018 294 million m3, FY2019 253 million m3, FY2020 242 million m3, FY2021 253 million m3
    Amount of Water Intake by Source (domestic)

Actions in the Moriyama Area

All water used at our Moriyama Works is drawn from groundwater systems. This water is primarily used as a coolant to cool machinery and equipment via heat exchange, but we are also promoting the reuse of the water we draw. The water reuse rate for fiscal 2021 was approximately double that of the previous fiscal year. We will continue working to reuse water within our Moriyama Works, from the perspective of long-term water resource security.

Prevention of water pollution

The Asahi Kasei Group is thorough in its water discharge management and leakage countermeasures in order to prevent contamination of bodies of water or groundwater. In addition, we have set a group-wide annual target of zero instances of leakage as covered by the Water Pollution Prevention Act.
In 2012, we issued our Guidelines on Wastewater Management. In addition to affirming our commitment to wastewater management based on this, we are also working on enhancing the capacity of wastewater treatment facilities and other equipment. Items regulated by the Water Pollution Prevention Act are managed within those standards.
In fiscal 2021, there were neither instances of leakage as related to the Water Pollution Prevention Act nor violations or fines related to environmental laws and regulations.

  • Nobeoka+Mizushima+Moriyama+Fuji+Ohito+Kawasaki+Suzuka+Other sitesFY2017 212 million m3, FY2018 221 million m3, FY2019 216 million m3, FY2020 204 million m3, FY2021 202 million m3
    Amount of Wastewater (domestic)
  • Nobeoka+Mizushima+Moriyama+Fuji+Ohito+Kawasaki+Suzuka+Other sitesFY2017 820 tons, FY2018 880 tons, FY2019 890 tons, FY2020 850 tons, FY2021 850 tons
    Chemical Oxygen Demand (COD) Load

Asahi Kasei products and technologies for water conservation

Microza™ hollow fiber membrane filtration module

We are a top-tier supplier of water treatment membranes and filtration systems. Microza™ is a hollow fiber membrane we have developed for water treatment. It is used in more than 1,600 water purification plants and wastewater treatment plants worldwide, including in the United States, China, Korea, Singapore, Thailand, Indonesia, and Middle Eastern countries. Singapore’s NEWater, Asia’s largest wastewater reclamation plant, has continued to use this product since 2007.
Going forward, we will continue to work on global water and environmental issues with the aim of resolving various problems related to water resources.

Saran Polyvinylidene Chloride Fiber

One important issue in wastewater treatment is reducing the amount of sludge generated, which is directly tied to decreasing its environmental impact. The Asahi Kasei Group conducts research and development into new commercial products that feature a unique technology using microorganism immobilized carrier that flows, making use of the characteristics of Saran fiber, which microorganisms inhabit easily.
Existing facilities can adopt these products by making simple improvements like installing screens, without requiring major modifications. This improves processing capabilities and reduces the amount of sludge generated.

Apolarm series environmental monitoring products

Asahi Kasei Technosystem's Apolarm Series detects a wide range of oil leaks, including floating oil (oil film and oil layers), sediment oil, and water-soluble oil. We will continue to expand our product line and protect the aquatic environment with oil detection devices for specific applications.

Apolarm C Oil layers of 3 mm or more trigger a capacitance shift and sound an alarm.
Apolarm M A non-contact laser detector that can sense minuscule amounts of oil film on the water surface.
Apolarm B Detects oil and organic solvents that have a greater specific gravity than water, causing them to sink.
Apolarm F Detects leakage of fluorescent water-soluble oils.