capacitive desalination (cdi) fo r seawater desalination

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Capacitive desalination (CDI) for seawater desalination Name: ZhangLiwen School: School of chemical engineering and technology Number: 2012207148

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Capacitive desalination (CDI) fo r seawater desalination. Name: ZhangLiwen S c hool: S chool of chemical engineering and technology Number: 2012207148. 4. 5. 1. 2. 3. Introduction of c apacitive desalination. Situation of water resources. Solutions to the problem. - PowerPoint PPT Presentation

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Page 1: Capacitive desalination (CDI) fo r seawater  desalination

Capacitive desalination (CDI) for seawater

desalination

Name: ZhangLiwen

School: School of chemical engineering and technology

Number: 2012207148

Page 2: Capacitive desalination (CDI) fo r seawater  desalination

Introduction of capacitive desalination4.

Situation of water resources1.

Solutions to the problem2.

Introduction of seawater desalination3.

Content

Conclusion5.

Page 3: Capacitive desalination (CDI) fo r seawater  desalination

The development of society

Situation of water resources

Population growth

Page 4: Capacitive desalination (CDI) fo r seawater  desalination

Pipeline discharging sewageTrash Truck Disposing of Garbage

Situation of water resources

Page 5: Capacitive desalination (CDI) fo r seawater  desalination

Highly Polluted River

Situation of water resources

Page 6: Capacitive desalination (CDI) fo r seawater  desalination

According to statistics, only 50% of people living in Central Africa can access safe water. The largest population without access to safe tap water is in China (25%)

Situation of water resources

Page 7: Capacitive desalination (CDI) fo r seawater  desalination

Solutions

Saving water Seawater

desalination

Reducing water pollution

Solutions to the problem

Page 8: Capacitive desalination (CDI) fo r seawater  desalination

FinallySecondFirst

Cleaning up polluted water

Not throwing trash or garbage into any stream or lake.

Protecting ourselves against polluted water.

What can we do about the water pollution ?

Solutions to the problem

Page 9: Capacitive desalination (CDI) fo r seawater  desalination

Don’t let our tears become the last drop of water on earth

Solutions to the problem

Saving water, begins from myself.

Page 10: Capacitive desalination (CDI) fo r seawater  desalination

DefinitionDefinition

Desalination is the process of removing salt and minerals from salt water to make it suitable for human consumption, irrigation and other fresh water uses.

Introduction of seawater desalination

Page 11: Capacitive desalination (CDI) fo r seawater  desalination

Desalination

ThermalThermal

MembraneMembrane

CapacitanceCapacitance

Saltwater is heated, evaporated and collected .

Saltwater is forced through membrane sheets at high pressures

Introduction of seawater desalination

Page 12: Capacitive desalination (CDI) fo r seawater  desalination

Advantage Principle

Introduction of CDI

Page 13: Capacitive desalination (CDI) fo r seawater  desalination

AdvantageAdvantage

Energy-efficient

No pressure and heating

Environment-friendly

No chemical reagents

Introduction of CDI

Page 14: Capacitive desalination (CDI) fo r seawater  desalination

CDI reactors comprise pairs of porous activated carbon electrodes through which the brine flows.

CDI reactors comprise pairs of porous activated carbon electrodes through which the brine flows.

Introduction of CDI

Page 15: Capacitive desalination (CDI) fo r seawater  desalination

Adsorption stage

The cations in the aqueous solution are adsorbed on the cathode and the anions are adsorbed on the anode , leaving a deionized solution in the cell, which flows out as freash water.

Introduction of CDI

Adsorption

Desorption

Page 16: Capacitive desalination (CDI) fo r seawater  desalination

Desorption stage

The electrodes are shorted, leading to ion desorption, thus forming concentrated solutions that are expelled from the cell as waste.

Desorption

Introduction of CDI

Page 17: Capacitive desalination (CDI) fo r seawater  desalination

Everyone has the accountability to save water and to propagate the concept of treasuring water.

CDI is regarded as a promising desalination process.

Desalination is useful in solving the problem of water shortage.

Conclusion

Page 18: Capacitive desalination (CDI) fo r seawater  desalination