What Is EDI In Water Treatment?

February 18, 2021

Control is critical in a laboratory environment. Any unexpected variable introduced into a sample can have a significant impact on the results of a test or production process. Absolutely everything that is used in these processes must be free of any and all contaminants that could potentially skew or ruin the efforts of researchers and technicians.

Water treatment is one of the most crucial elements of these procedures, given how large a role it plays in medical and research environments. Any water used must be in its purest form to prevent contamination and the invalidation of many long hours of hard work. This is why many companies utilize the electrodeionization (EDI) process. Its effectiveness and the other advantages it provides make it a popular choice for purifying water.

How Does It Work?

The EDI water purification process uses an electrical current to drive ions through membranes and resins that filter out any impurities. Water enters the EDI module, which acts as an ion exchange bed. This means an electrical field is applied perpendicular to the flow of the liquid, which forces the impurities to move through the resins and membranes. The unwanted particles are collected into concentrated streams that can be either drained out of the system or recycled. What remains once the process is completed is deionized water that can be used directly or sent to undergo another round of purification.

Among the many ionizable contaminants that can be removed successfully through this procedure include ammonia, boron, silica, residual salts and carbon dioxide. Not only does this method result in purified water, but it also provides additional benefits when compared to other types of processes. One of the most important is that the impurities are removed from the system, rather than building up in the resins or membranes. This means a single EDI unit can be used continuously for years before it needs to be replaced. It also provides a higher degree of purity than single-bed ion exchange systems that may allow some ions to slip through.

Turn to Technical Safety Services

As a leader in water purity technology serving a multitude of industries, Technical Safety Services can be your one-stop source for implementing this technology in a lab setting. We provide comprehensive turnkey solutions that range from selecting a unit to installing it to complete maintenance service after the fact. With our expertise, laboratories can ensure they remain compliant with all of the relevant regulatory and industry standards.

Our status as one of the leading providers of testing and certification for cleanrooms and other controlled environments means we understand the strict requirements for certain companies. We serve clients in sectors including pharmaceutical, food and beverage, aerospace, and biotechnology industries. Our comprehensive EDI capabilities are only one facet of the many high-purity water solutions we offer.

If you want to learn more about the extensive experience we can bring to your operations, get in touch with us today and speak with one of our representatives.

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