In many small water supply stations, water is disinfected using gas or liquid chlorine. This traditional method has failed to effectively control concentrations and can produce harmful excess chlorine for users. The High-Tech Development Center of the Vietnam Academy of Science and Technology has recently introduced a new solution – disinfection using Javen water produced on-site from salt.
According to Dr. Nguyen Dinh Cuong, the project leader, with this new solution, Javen is a strong oxidizing agent that is non-toxic and does not decompose like chemical Javen (pre-packaged form). It can be produced as needed, eliminating the need for long-distance transportation as required by other methods. Therefore, it is highly effective for disinfecting medium and small-scale water supply systems.
Based on this principle, the research team has successfully designed and manufactured Javen water production devices suitable for various scales ranging from 10 to 1000 m3/hour. The equipment will be integrated into the water supply station’s cycle, using only electricity, water, and salt as input materials. The output of the device is electrolyzed Javen water, which is fed into the water pipeline at a specific ratio. With this method, disinfecting 1m3 of domestic water costs only 25 Vietnamese Dong, which is significantly cheaper than other methods. Additionally, operators can easily adjust the concentration of Javen water in the pipeline as desired.
Mr. Cuong also noted that the device has equivalent features to American counterparts but is only one-third of the cost. Thanks to these advantages, the new product, which emerged at the end of 2005, has been well-received by various localities and represents the most refined outcome after 10 years of research by the Center.
