Severn Trent Services-Apliclor, a supplier of water and wastewater treatment solutions, has been selected to design and install a new disinfection system for the Iznájar Drinking Water Treatment Station, which supplies 235,000 residents in the Spanish province of Cordoba. The system uses Aquadiox chlorine dioxide generators to produce chlorine dioxide on site, providing residual disinfection to prevent bacteria from forming in the distribution network. The new disinfection system, due to be completed by the end of 2010, will improve water disinfection and enable a doubling of water treatment capacity, from 51,840 m³/day to 103,680 m³/day. The contract, which also includes upgrading the existing chlorine gas dosing equipment, is valued at €370,000 (USD $493,000).