The Evolution of Using UV Light to Disinfect

The Evolution of Using UV Light to Disinfect

historical street image reflecting history of using UV light to disinfect
UV light has been used to disinfect in different applications for well over 100 years.

Ultraviolet (UV) light has been used for decades to eliminate harmful bacteria and viruses from water, surfaces, and the air. Join us as we trace the history of using UV light to disinfect water, surfaces, and air, from early discoveries to its current applications and future potential. 

Farlite Solutions is leading the charge in finding innovative ways of using UV light – particularly the more effective UVC light — to disinfect inside everyday indoor environments. Learn how you can harness this technology for your commercial space.

Early Discoveries in the 1800s

The story of UV disinfection begins in the 19th century with the discovery of ultraviolet light itself. In 1801, German physicist Johann Wilhelm Ritter observed that invisible rays beyond the violet end of the visible spectrum could darken silver chloride-coated paper. This marked the discovery of ultraviolet radiation, later categorized into UVA, UVB, and UVC based on their wavelengths.  

It wasn’t long before scientists began to understand the biological effects of this newly discovered light. In the 1870s, Downes and Blunt, two British researchers, observed that sunlight could kill bacteria in test tubes. This observation, though not fully understood at the time, laid the foundation for the concept of UV disinfection.

By the early 20th century, the germicidal properties of UV-C light, the most effective type for disinfection, were becoming clearer. In 1910, the first water treatment facility using UV light was built in Marseille, France, marking a significant milestone in public health. This early adoption demonstrated the potential of UV technology to combat waterborne diseases and improve sanitation.

However, the early days of UV disinfection were not without challenges. Early UV lamps were inefficient, had a short lifespan, and were relatively expensive. These limitations hindered the widespread adoption of the technology. Despite these hurdles, the potential of UV light to kill harmful microorganisms was undeniable, paving the way for further research and development in the decades to come.

Growing Adoption of Using UV Light to Disinfect in the 1900s

The mid-20th century saw UV disinfection technology transition from a promising concept to a practical solution. William F. Wells, a Harvard University sanitary engineer, demonstrated the rapid inactivation of airborne microorganisms using 254 nm UV light. This groundbreaking research provided scientific evidence for the effectiveness of UV air disinfection.

In the 1930s, Westinghouse developed the first commercially available UV germicidal lamps, primarily for use in hospitals. Duke University Hospital began using upper-room UVGI (Upper Level Germicidal Irradiation) systems in 1936 to prevent the spread of airborne diseases like tuberculosis. UV disinfection became increasingly common in operating rooms, patient wards, and laboratories to combat hospital-acquired infections and maintain sterile environments.

After World War II, a new type of UV lamp became popular. These lamps, called low-pressure mercury lamps, were better at killing germs and lasted longer than older models, which made using UV light much more affordable and reliable. 

Concerns about foodborne illnesses led to the adoption of UV disinfection in food processing plants. By the 1950s, UV was being used to disinfect packaging materials, surfaces, and even the air in processing facilities to prevent contamination and extend shelf life. The pharmaceutical industry also recognized the importance of maintaining sterile environments. UV disinfection was integrated into cleanrooms and manufacturing processes to ensure product safety and prevent microbial contamination.

With growing adoption, safety concerns regarding UV exposure prompted the development of safety standards and guidelines. Organizations like the American Conference of Governmental Industrial Hygienists (ACGIH) established exposure limits beginning in the 1960s to ensure the safe use of UVC technology. Farlite’s UVC solutions were developed with the utmost safety in mind while effectively eliminating airborne pathogens. 

Impact of COVID-19 and Future of UV Disinfection

The COVID-19 pandemic brought unprecedented attention to the importance of disinfection and infection control. As the world grappled with a novel virus, the demand for effective disinfection solutions skyrocketed, and UVC technology emerged as a crucial tool in the fight against the pandemic.  

The pandemic served as a catalyst, accelerating the adoption of UV disinfection across various sectors. Hospitals increased their reliance on UV-C to disinfect patient rooms and equipment, while businesses sought out UV solutions to sanitize workspaces and public areas. Even schools and transportation systems began exploring the use of UVC to minimize the risk of transmission.  

This increased demand also fueled innovation, leading to the development of new and improved UVC technologies. For example, Farlite integrates The integration of sensors, artificial intelligence, and automation for a is leading to the development of “smart” UV disinfection systems. The Farlite UVPhasor These systems can optimize UV dosage, target pathogens circulating in the air, and provide real-time feedback on disinfection effectiveness.  

As research continues and technology advances, we can expect to see even more innovative applications of UVC in the years to come. From public spaces and transportation systems to homes and personal devices, using UV light to disinfect will help create a healthier and safer future for all.

Innovative Commercial Solutions Using UV Light to Disinfect

Experience the future of UV disinfection. Farlite Solutions’ innovative UVPhasor system offers cutting-edge technology for superior pathogen control. With its advanced features, including targeted disinfection, real-time monitoring, and automated operation, our system ensures maximum efficacy and safety. Contact us today to get a custom quote for your commercial space.