Closed vessel UV - More than just for drinking water

Description:Closed vessel UV - more than just for drinking water. Presenter: Patrick Bollman, P. Eng., Engineered Treatment Systems (ETS), LLC. Ultraviolet (UV) disinfection is now a standard feature in many wastewater utilities. UV has also been adopted by the drinking water community, as a barrier against chlorine tolerant species such as Cryptosporidium and Giardia. The technology is widely favored due to its non-chemical nature, the fact that no subsequent dechlorination process is required, and its ability to be unselective in disinfection performance. Throughout the years, the focus in municipal wastewater is to install UV in an open channel. However, there are alternative solutions to achieve required disinfection. The presentation will focus on the following aspects: • UV fundamentals (UV 101) – what is UV, how is UV light generated, what UV does and how it works, how organisms respond to UV, and a comparison of available lamp types. • Equipment selection – what manufacturers will require to provide an adequately sized system including flowrates (peak, average, and minimum), water quality (transmittance – how much light passes through the water, soluble iron and manganese, hardness, TSS), required disinfection/dose and existing plant hydraulics.• Introduction to closed vessel UV technology for treatment of municipal wastewater and reuse. • Benefits of closed vessel UV for disinfection including: installation savings and flexibility, reduced maintenance, and improved safety. The purpose is to give engineers and municipalities information regarding other forms of successfully operating ultraviolet disinfection systems instead of designing around the "traditional open channel" types of UV disinfection.

Authors: Patrick Bollman

Subjects: Drinking Water, Wastewater

Tags:2015 BCWWA Annual Conference & Trade Show,AC15,AC15 presentations

Citation:Stream 7: Technology and Innovation

Publication Date:May 28th, 2015 Upload Date:Jun 26th, 2015

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