The first national mandatory standard for the water purification industry - GB34914-2017 "Reverse Osmosis Water Purifier Water Efficiency Limit Value and Water Efficiency Rating" national standard (referred to as "Water Efficiency Standard") was officially released and will be implemented early next year. . This means that the state will impose mandatory water conservation requirements on the production and sales of reverse osmosis water purifiers. This is another requirement of the state for reverse osmosis water purifiers following the safety of health and product quality. This standard will have a profound impact on the water purification industry, which will force the water purifier manufacturers to carry out technological innovations and improve the water-saving performance of the reverse osmosis water purifiers produced.
Reverse osmosis water purifiers will definitely emit concentrated water due to the technical characteristics of their cross-flow filtration. Prior to the publication of the Water Efficiency Standard, the term “waste water ratio†was often used in the industry to characterize water use. Then, what is the difference between the “water efficiency†in the “Water Efficiency Standard†and the “waste water ratio†that the industry originally used?
a test condition and normative
The “waste water ratio†is self-identified by each manufacturer and has not undergone rigorous testing. It is only a rough proportion. The “water effect†needs to be tested in strict accordance with the test conditions stipulated in the Water Efficiency Standard.
Two nominal requirements are different
The “waste water ratio†is the manufacturer's own standard, and the country does not have a requirement to be required. After the “water efficiency†mark is implemented, each reverse osmosis water purifier must be marked in a conspicuous position.
Three representations are different
The "waste water ratio" is expressed in a proportional manner. For example, if one part of purified water is prepared, three parts of concentrated water are discharged, and the ratio of waste water is expressed by 1:3. The “water efficiency†is expressed as a percentage. If the water efficiency is 60%, it means that the raw water is 60%, and the concentrated water is 40%.
Four meanings are different
The water efficiency is the utilization efficiency of water resources, which is the ratio of the amount of purified water obtained to the total amount of water consumed, and the water consumed when the water purifier is flushed is counted.
The "waste water ratio" only examines the ratio of the purified water flow rate when the reverse osmosis membrane is made to water and the concentrated concentrated water flow rate. The water consumed by the water purifier when flushing, no matter how much is not included, therefore, it does not It can reflect the utilization efficiency of water resources, but only an operating parameter of reverse osmosis water purifier.
Five water effects have minimum limit requirements, while “waste water ratio†does not
The Water Efficiency Standard stipulates that reverse osmosis water purifiers with a water efficiency of less than 35% (Grade 5) are prohibited from being produced and sold. There is no minimum limit for the "waste water ratio".
After the release of the Water Efficiency Standard, manufacturers and distributors of reverse osmosis water purifiers should have an understanding of the above concepts to avoid misunderstanding and unnecessary trouble.
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