Seyedehyasamin Salamat , Carlos Rios Perez, Carlos Hidrovo
Graduate Category: Engineering and Technology Degree Level: PhD Abstract ID# 601
Capacitive Deionization Water Desalination (CDI) Seyedehyasamin Salamat , Carlos Rios Perez, Carlos Hidrovo
Multiscale Thermal Fluids Laboratory
Abstract
Method
• Population growth and water scarcity around the world demand more efficient methods for water desalination. • Capacitive deionization (CDI) is a relatively new electric fieldbased desalination technique. • It is capable of recovering a fraction of the input energy. • Here, we present a new multi-step buffered methodology for CDI desalination to improve the overall performance of this method.
Results [4] Purified water (×104 m3)
Comparison between a buffered and a cascaded CDI system: A) Buffered system: Two cells with one intermediate solution. Buffered
1.82
Not buffered
1.45
Energy Desalination consumption Percentage (%) (J) 17.39 42.22 7.66
36.01
Introduction • Water crisis is the #1 global risk based on impact to society [1]. • Around 700 billion people suffer from water scarcity [2]. • Only 3 percent of water on Earth is fresh [3]. • Only 1 percent of our freshwater is easily accessible [3].
B) Cascaded system: Two cells with no intermediate solution.
Conclusion CDI: New method for water desalination: Low-energy process Capable to recover fraction of the input energy for desalination Low maintenance Chemical free
Desalination
Regeneration
• Depending on the precedence (desalination percentage, energy consumption, or volume of the desalinated water) either of these setups can be chosen for desalination. • To improve the energy input per volume of the treated water, or total amount of time required for water purification two, or more cells can be used after the solution buffer. References: [1] Water org. (2014) Water Facts, www.water.org/water-crisis/water-facts/water/ [2] The United Nations (2014) UN-water factsheet on water security, http://www.un.org/waterforlifedecade/scarcity.shtml [3] United States Environmental Protection Agency (2015) Water Trivia Facts, http://water.epa.gov/learn/kids/drinkingwater/water_trivia_facts.cfm [4] Salamat S, Rios Perez CA, Hidrovo C, Performance Characterization of a Capacitive Deionization Water Desalination System with an Intermediate Solution and Low Salinity Water. Proceeding of the 13th ASME International Conference on Nanochannels, Microchannels, and Minichannels, San Fransisco, CA, July 6-9, 2015 (Accepted).
Capacitive Deionization Water Desalination (CDI) Seyedehyasamin Salamat , Carlos Rios Perez, Carlos Hidrovo
Multiscale Thermal Fluids Laboratory
Abstract
Method
• Population growth and water scarcity around the world demand more efficient methods for water desalination. • Capacitive deionization (CDI) is a relatively new electric fieldbased desalination technique. • It is capable of recovering a fraction of the input energy. • Here, we present a new multi-step buffered methodology for CDI desalination to improve the overall performance of this method.
Results [4] Purified water (×104 m3)
Comparison between a buffered and a cascaded CDI system: A) Buffered system: Two cells with one intermediate solution. Buffered
1.82
Not buffered
1.45
Energy Desalination consumption Percentage (%) (J) 17.39 42.22 7.66
36.01
Introduction • Water crisis is the #1 global risk based on impact to society [1]. • Around 700 billion people suffer from water scarcity [2]. • Only 3 percent of water on Earth is fresh [3]. • Only 1 percent of our freshwater is easily accessible [3].
B) Cascaded system: Two cells with no intermediate solution.
Conclusion CDI: New method for water desalination: Low-energy process Capable to recover fraction of the input energy for desalination Low maintenance Chemical free
Desalination
Regeneration
• Depending on the precedence (desalination percentage, energy consumption, or volume of the desalinated water) either of these setups can be chosen for desalination. • To improve the energy input per volume of the treated water, or total amount of time required for water purification two, or more cells can be used after the solution buffer. References: [1] Water org. (2014) Water Facts, www.water.org/water-crisis/water-facts/water/ [2] The United Nations (2014) UN-water factsheet on water security, http://www.un.org/waterforlifedecade/scarcity.shtml [3] United States Environmental Protection Agency (2015) Water Trivia Facts, http://water.epa.gov/learn/kids/drinkingwater/water_trivia_facts.cfm [4] Salamat S, Rios Perez CA, Hidrovo C, Performance Characterization of a Capacitive Deionization Water Desalination System with an Intermediate Solution and Low Salinity Water. Proceeding of the 13th ASME International Conference on Nanochannels, Microchannels, and Minichannels, San Fransisco, CA, July 6-9, 2015 (Accepted).
