A Holdings Group and 駿河GXテクノロジー announced the results of a demonstration test on PFAS concentrates in Shizuoka City. PFOS and PFOA were reduced below the detection limit, and the companies also announced a total donation of ¥1.5 billion to Shizuoka City over the three years from fiscal 2026 to fiscal 2028.
At a press conference held in Tokyo, A Holdings Group and 駿河GXテクノロジー reported the results of a demonstration test to treat PFOS and PFOA concentrates, among PFAS, with subcritical water. The test targeted concentrates recovered at the Miho Rainwater Pumping Station in Shizuoka City and treated them for 60 minutes in subcritical water at approximately 220°C. Additives were also used in the treatment.
Before treatment, PFOS stood at 46,000 ng/L and PFOA at 66 million ng/L. Both were reduced by more than 99% to below the testing equipment’s detection limit of 50 ng/L.
Under Japan’s drinking water quality standards, the combined concentration of PFOS and PFOA is set at 50 ng/L. The demonstration therefore improved water quality to a level that did not exceed this standard. Aoyama (青山), the representative, also discussed whether additives were needed depending on the temperature conditions.
At the press conference, a presentation ceremony was held for a donation by Awai (粟井), the representative of A Holdings, of a total of ¥1.5 billion to Shizuoka City for the conservation of the natural environment over the three years from fiscal 2026 to fiscal 2028. The companies said they aim to commercialise the treatment business after optimising the treatment conditions, scaling up the equipment and completing third-party verification.