Industrial Process Water Disinfection

Industrial Process Water Disinfection

If an industrial process uses water,  quality of the water is generally important. Making a quality product requires good quality, bacteria free water. Suspended particles, bacteria or excessive salts or chemicals can interfere with an industrial process. In some cases, they can damage expensive plant and equipment.

If process water quality is important, manufacturers often install their own water treatment plants. This makes it easier to control water quality especially if there are multiple sources of water. For example, some process plants have to use a mixture of town water and borewell water.

Such industrial water treatment plants require active maintenance to prevent growth of bacterial colonies.

Filtration Plant Disinfection, Soft Water Disinfection and DM Water Disinfection

Water filters are often susceptible to bacterial growth. Intermittent water flow aggravates the problem. Bacterial growth on filters, softening plants or DM Plants are common causes for microbial contamination of treated water.

UV disinfection of filtered water is a proven solution for such problems.

RO (Reverse Osmosis) Water Disinfection

RO Plants – small and large – often use UV disinfection for 2 common applications:

  • RO Feed Water Disinfection to Protect Membranes: When water entering a RO plant is contaminated with microorganisms, some membranes tend to accumulate bacteria, algae and other microorganisms. The bacterial colonies grow on the membrane, feeding on the nutrients in RO feed water. Over time the bacterial fouling starts choking membrane pores and some bacterial escape into RO permeate.


  • RO Permeate Disinfection: RO membranes have pore sizes smaller than typical bacteria. However, over time RO membranes and the supporting components like O rings start allowing bacteria, viruses and other microorganisms to escape into RO permeate. Even in new RO plants, RO permeate needs to be often stored where it can pick up microbial contamination, making it unsafe for use.

Feed water disinfection with UV and RO permeate disinfection are popular and reliable ways to protect your RO plant from microbial contamination.

UV Dose for Industrial Process Water Disinfection

Depending on the industrial process requirement, we can select appropriate UV Dose. For example, EOL UV Dose>30mJ/cm2 may be sufficient for secondary use water applications. On the other hand, a higher microbial load or higher log reduction may require a much higher UV dose.


In conclusion, well designed UV units can protect industrial process water from microbial contamination.

If you have any questions related to process water disinfection, or if you would like to size a UV unit for your plant, please call (02) 9896 1165 or contact us

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