Japanese technology helps generate clear air, water

Tokyo: The Kubota Corporation of Japan has invented an air purifier that covers about 200m2, an area almost same as a tennis court.

"This machine purifies air by using water. It not only sterilises and deodorises air but also humidifies," said Hiromichi Doi of sales department, Kubota Corporation.

The strong purification power of `Pure Washer' is the result of Kubota's high technology .

"Our company has been in business for 120 years. We started with offering safety water to drink. So, we are proud of our technology about water and that is used in this machine. Besides we have been operating air conditioning business for about 50 years. So we combined the technology of water and air conditioning then Pure Washer was made," Hiromichi Doi added.

Pure Washer has several ways to use. For example, slightly acid electrolysis water made by Pure Washer can be took out and used for sterilisation of room or cooking utensils by itself.

"We have recently launched this machine. And we have already accepted orders by mainly nursing-care facilities. Those facilities have a lot of problems about air such as odour and infection. So we think they can be our main clients," Hiromichi Doi said further.

The deodorisation functionality of pure washer was demonstrated to a Korean visitor and it showed that the device works for 30 seconds and then the air becomes clean.

"Wonderful! It's very clear nice to smell there is no ammonia smell. So I think it's very good production for everyone," said a Korean visitor.

In another technological development, a water screening technology removes impurities from water and revives into clean water.

Japan's filtration device manufacturer has developed a new screening device called "wedge wire screen", proposing the new water filtration method that performs in four-stage.

In the first stage, the screening device collects the impurities up to about 100µ size.

"The device attached here is the "wedge wire screen". Based on the customer's screening requirement and the amount, we will customize the suitable screen size. This device is mainly used for industrial water, especially for the contaminants generated in the waste water treatment facilities, and it has been used as a Solid-liquid separation equipment for the product accumulation that occurs in the circulating water in the manufacturing process," said Takao Imamura, general manager, sales department, Toyo Screen Kogyo co. Ltd.

For the filtration of impurities, the device utilises the inverted triangle gaps of wedge-shaped wires arranged at equal intervals.

The main material uses stainless steel with high strength with excellent durability.

It features extreme dehydration resistance with less clogging which comes from the less contact surface to solids.

In the second stage, the screening device collects the impurities of smaller than 100µ to 30µ size.

"This is the Solid-liquid separation equipment using a fine wedge wire screen. Mesh size is 30µ," Imamura added.

The third stage screening uses 5µ size mesh screens.

"This strainer device combines a reversal device for continuous filtering, with the cylindrical screen arrangement as you see. Currently we are developing product for further aims of filtration and accumulation of under 5µ as a fourth-stage. We are targeting to expand to the areas such as membranes and filters," Imamura added.

These devices have already been sold to Thailand, Vietnam, Indonesia and Malaysia, as a part of the environmental equipment.

"Environment has grown up to be a serious issue in Southeast Asia. Some of the waste water is dumped into rivers and the sea, which often includes a variety of impurities that are particularly not allowed to discharge into the environment. We believe that we can help from the environmental aspects in the future, by developing a device that can easily handles the waste water in the preceding process," Imamura added.

This advanced technology would be a big help for the industries that challenge to the environmental measures.