Ultraviolet Light (UV) is a well established technology, and has been used for the disinfection of water and waste water for many years. UV light is the portion of the magnetic spectrum which lies between x-rays and visible light, and within this portion are four defined regions, however the region of most interest due to its disinfection capabilities is UVC with the wavelength at 254nm being optimum for disinfection.

At a wavelength of 254nm UVC causes damage to the DNA of micro-organisms. In simple terms DNA is required by microorganisms to initiate the process of cell division and therefore multiplication, this is achieved by the DNA pulling apart and forming two separate strands (The dotted line indicates normal separation). The power of UV fuses these stands together so that they cannot separate, and therefore cell division cannot take place and the micro-organism dies.

 Because of the destructive capabilities of UV light it has found acceptance in the water treatment industry. This is due to the ease of which water can be treated i.e. the transparency is such that UV can penetrate deep into the fluid. The treatment of water using UV becomes a problem however, when high levels of suspended solids, turbidity, colour, and soluble organic matter is present. The materials can react with UV light and therefore reduce the disinfection capabilities; also turbidity makes it difficult to penetrate water.

Until recently UV light as a disinfection technology has been deemed unsuitable for treating industrial functional fluids such metalworking fluids. This is due to the facts that not only are they opaque in nature, and therefore very difficult for the UV to penetrate, but also one of the primary uses for these fluids is to remove solid particles, and therefore the fluids will contain these particles on an ongoing basis.

Functional FluidiPURtech’s has a vast knowledge and experience of industrial microbiology, and more specifically the problems associated with the microbiological contamination of functional fluids from both an economic and health and safety standpoint. Our expertise also extends to the industrial applications which utilise functional fluids within their production operations, and therefore helped us to understand the problems associated with the use of UV light to treat these industrial fluids when developing our 2nd generation UV system.

Through a combination of the most modern and compact filtration technology and our unique patent applied for UV fluid penetration/photo-cat easy clean design iPURtech has established the MicroReactor range of UV units specifically for the treatment of turbid and opaque functional fluids.