The Process and Water Quality Specialists

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Disinfection is a process that aims to inactivate pathogenic microorganisms in the water that pose a risk to public health. There are a wide range of disinfectant processes used in various industries, but the most commonly applied disinfection processes in water and wastewater treatment are (1) chlorine, (2) chloramines, (3) ozone, and (4) ultraviolet (UV) light. Chlorine, chloramines and ozone are chemical oxidants, while UV light is a type of electromagnetic radiation. Chemical oxidation inactivates microorganisms in a mechanistically different manner than UV radiation. Chlorine, chloramines and ozone mainly damage the cellular structure, which hinders biosyntheses and growth, while UV light damages nucleic acids of microorganisms, which interferes with replication. In general, chemical disinfection is more effective at higher temperatures, as kinetic rates are faster, while UV is more effective as the water becomes more particle free and clear (high UV transmittance).

Trussell Technologies, Inc. experience with disinfection processes in water, wastewater, and recycled water treatment (including full advanced treatment trains) provides unique perspective on process selection for a given application. While industry trends are simply to replicate past designs, our firm believes that each design has unique objectives that along with client goals will direct the disinfection process selection to the most cost effective alternative.