Siemens has won a $14m contract to provide a hollow fibre membrane treatment system at Orange County Water District (OCWD) in California, USA.
The contract is part of the Groundwater Replenishment (GWR) System expansion undertaken by the water district, which aims to increase its flow to 134 million gallons per day for the reverse osmosis (RO) membranes downstream.
The new 48 million gallons per day membrane system will work in cohesion with an existing Siemens membrane system for the projected downstream increase.
Construction is expected to begin in 2010.
Siemens will oversee the expansion, which will comprise installation of Memcor CS membrane modules, ancillaries, control system upgrades and associated electrical work, according to the company.
OCWD will add ten more membrane basins to the GWR System, which is the largest water purification project in the world and has been operating since January 2008.
Highly treated wastewater is pre-treated by Memcor submerged membrane modules at a rate of 86MGD before entering the RO units, followed by ultraviolet and hydrogen peroxide disinfection.
The GWR System produces high quality water using less energy and fewer gas emissions.
GWR System is a joint project of OCWD and the Orange County Sanitation District, conceived in 1997 to preserve local groundwater resources.
