Hyflux Ltd. is engaged in investment holding company. Its principal activities relating to the manufacturing of membrane systems were transferred to a subsidiary on January 1, 2008. The principal activities of its subsidiaries comprise Water and renewable resources management. Water includes seawater desalination, raw water purification, wastewater cleaning, water recycling, water reclamation and ultra pure water production for municipal and industrial clients, as well as home consumer filtration and purification products, and the design, build and sale of water treatment plants, wastewater treatment plants and water recycling plants under concession arrangements. Renewable resources management includes development of membrane applications in resource recovery, waste recycling and energy reclamation, including applications, such as used oil recovery and recycling; development and commercialization of specialty materials, and separation, concentration and purification treatments.