Submitted to: Irrigation pathogens and water quality webinar series
Publication Type: Abstract Only
Publication Acceptance Date: 4/4/2014
Publication Date: 4/17/2014
Citation: Copes, W.E. 2014. Alternative disinfectant water treatments. Irrigation pathogens and water quality webinar series. 1.
Technical Abstract: Alternative disinfestant water treatments are disinfestants not as commonly used by the horticultural industry. Chlorine products that produce hypochlorous acid are the main disinfestants used for treating irrigation water. Chlorine dioxide will be the primary disinfestant discussed as an alternative disinfestant. While chlorine dioxide (ClO2) is a chlorine product, it behaves differently than the common chlorine products familiar to most producers. First, we will look at what control responses make ClO2 unique, such as biocidal activity over a broad pH range and low reactivity to compounds such as ammonia. Second, general issues that affect disinfestant activity, such as water temperature, will be discussed. Third, two types of ClO2 delivery systems will be presented. The seminar will finish with a short review of some additional disinfestant products, with an emphasis on hydrogen peroxide products. Hydrogen peroxide and peroxyacetic acid products have shown activity against a number of plant pathogens and produces environmental friendly byproducts. Hydrogen peroxide products have use requirements similar to the commonly used chlorine products. Other products and technologies, such as electrolyzed oxidizing water, ultraviolet light, ozone, carbon dioxide, silver and titanium oxide nanoparticles, filtration, and slow sand filtration, will be briefly introduced.