Having set a new energy saving benchmark for seawater desalination, Siemens is now poised to transition their ground-breaking technology to the product development phase.
As a result of an R&D initiative that commenced in October 2008, a demonstration plant was built in Singapore to treat seawater to drinking water quality. The results, which will be presented at Singapore International Water Week, show that the new process reduces desalting energy by over 50% compared to best available technology.
The next step for Siemens is to set up a full-scale system in cooperation with Singapore’s national water agency PUB by 2013.
In Singapore, which is an island nation, and in other regions, seawater is becoming increasingly important in replenishing the supply of drinking water. However, to desalinate it for potable use is an extremely energy-intensive process. “Our new technology marks a revolution in seawater desalination,” said Ruediger Knauf, Vice President of Siemens Water Technologies’ Global R&D.
“The results of our pilot facility show that the new process not only functions in the laboratory but also on a larger scale in the field. Because of its high energy efficiency and thus good CO2 footprint, electrochemical seawater desalination can play a major role in regions suffering from freshwater shortages.”
Since December 2010, the Siemens demonstration unit has been treating 50 m3 of seawater per day at a PUB facility in Singapore. The project goal was to produce World Health Organization standard drinking water quality from seawater, at the same time cutting energy consumption by half compared to current technologies. Instead of using reverse osmosis, which requires highpressure pumps to force water through semi-permeable membranes, the Siemens engineers turned to electrochemical desalination. The process combines Electrodialysis (ED) and Continuous Electrodeionization (CEDI), both applying an electric field to draw sodium and chloride ions across ion exchange membranes and out of the water. As the water itself does not have to pass through the membranes, the process can be run at low pressure, and hence low power consumption.
The seawater is pre-treated with a self-cleaning disk filter, followed by Memcor ultrafiltration modules. The pilot desalination plant is composed of three ED units arranged in series to handle high concentrations of salt. They are followed by three CEDI units assembled in a parallel flow configuration to remove smaller amounts of salt.
The energy demand of the whole process including pumping, pre-treatment, desalting, and post-treatment is less than half of what is used by the best available seawater desalination technologies today, which is typically between 3.4—4.8 kWh/m3. Besides the energy savings, other advantages are low vibration and noise levels, improved safety, and only minimal pre- and post-treatment.
These achievements have been attained in close partnership with Singapore’s national water agency PUB and Singapore’s Environment & Water Industry Programme Office (EWI), which awarded an R&D grant to co-fund Siemens as a result of a Challenge Call in 2007. “We are very pleased that our joined efforts have come to fruition and show such promising results,” said Harry Seah, Director Technology and Water Quality of PUB. “Now we are working with Siemens Water Technologies to construct a full-scale customer pilot in our upcoming desalination testing facility in Tuas.” Setting up this pilot by 2013 is the next milestone in transitioning the electrochemical desalination technology to a viable product offering.
The Challenge Call is part of EWI’s focus to raise Singapore’s status as a global hydrohub with R&D as the key driver. With a research funding of S$330 million from the National Research Foundation, EWI aims to create a vibrant and thriving R&D landscape in Singapore.
Further information about solutions for water treatment is available at: http://www.siemens.com/water
Contact USA: Ms. Allison Britt Corporate Communications Siemens Industry, Inc. Water Technologies Business Unit 2501 N. Barrington Rd. Hoffman Estates, IL 60192 USA Phone 1-847-713-8477 E-mail address firstname.lastname@example.org
The Siemens Industry Sector (Erlangen, Germany) is the worldwide leading supplier of environmentally friendly production, transportation and building technologies. With integrated automation technologies and comprehensive industry-specific solutions, Siemens increases the productivity, efficiency and flexibility of its customers in the fields of industry and infrastructure. In fiscal 2010, which ended on September 30, 2010, revenue from continuing operations of the Industry Sector (excluding Osram) totaled around €30.2 billion. At the end of September 2010, Siemens Industry Sector had around 164,000 employees worldwide without consideration of Osram. Further information is available on the Internet at: www.siemens.com/industry The Siemens Industry Solutions Division (Erlangen, Germany) is one of the world's leading solution and service providers for industrial and infrastructure facilities comprising the business activities of Siemens VAI Metals Technologies, Water Technologies and Industrial Technologies. Activities include engineering and installation, operation and service for the entire life cycle. A wide-ranging portfolio of environmental solutions helps industrial companies to use energy, water and equipment efficiently, reduce emissions and comply with environmental guidelines. With around 29,000 employees worldwide (September 30), Siemens Industry Solutions posted sales of €6.0 billion in fiscal year 2010. http://www.siemens.com/industry-solutions
Stefanie Schiller | Siemens Industry
Harder 3D-printed tools – Researchers from Dresden introduce new process for hardmetal industry
11.10.2018 | Fraunhofer-Institut für Keramische Technologien und Systeme IKTS
Flying High with VCSEL Heating
04.10.2018 | Fraunhofer-Institut für Lasertechnik ILT
Max Planck researchers revel the nano-structure of molecular trains and the reason for smooth transport in cellular antennas.
Moving around, sensing the extracellular environment, and signaling to other cells are important for a cell to function properly. Responsible for those tasks...
Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.
Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...
Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
19.11.2018 | Event News
09.11.2018 | Event News
06.11.2018 | Event News
20.11.2018 | Life Sciences
20.11.2018 | Life Sciences
20.11.2018 | Physics and Astronomy