How to Create Drinkable Water with Sunlight and Photocatalysts

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Panasonic

2. Achieving high processing speeds with water purification technology that disperses photocatalytic materials:

When these novel photocatalytic particles are agitated, TiO₂ is released from the zeolite and dispersed throughout the water. As a result, reaction speed is markedly higher than in conventional methods of fixing TiO₂ to a substrate surface, enabling a large volume of water to be processed in a short amount of time. Calm water causes TiO₂ to bind to zeolite again, making it easy to separate and recover the photocatalysts from the water — allowing them to be reused.

Establishing an Infrastructure for Supplying Safe Drinking Water

Along with being driven by light, another key feature of photocatalysts is that they remove any necessity of chemicals. As such, they offer a low-cost and environmentally friendly way of treating water.

Panasonic aims to provide this water to small rural communities, for example, using trucks equipped with photocatalytic water purification systems. Beyond this, the company is looking at linking up with local water supply operators to establish water purification facilities, and is also considering the licensing of this technology to businesses.

Panasonic is working to lower costs and maintenance requirements with the water purification systems — its aim being to make this technology available right across India and other emerging nations.

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