Pole Mountain


Presenter - Steve Green is the Regional Manager of the Treatment business of Xylem Inc. which encompasses the Sanitaire, Wedeco, Leopold and Flygt Mixer brands for the Western United States and Western Canada.  Steve holds a Bachelor of Science Degree in Civil Engineering and a Business Administration minor from Montana State University, and a Master’s of Business Administration from the University of Washington. Steve started his career in civil engineering consulting focused on water and wastewater treatment plant and conveyance system design, before obtaining his MBA degree and transitioning into business development, sales and marketing roles in the water industry, including Amiad Filtration Systems and now Xylem.  When not on the job in the water industry, Steve enjoys time on the water fishing for trout, salmon and steelhead, whitewater rafting, scuba diving, trail running and big game hunting.  Steve lives in Portland, Oregon with his wife Heather and son Forrest.

Co-presenter-William Flanagan graduated from Montana State University in 1999 with a degree in Mechanical Engineering. 1999 to 2005 worked in the San Francisco, CA area as a Sr. Project Manager for Merilich Mechancial. 2006 moved his family back to Bozeman, MT to work for an HVAC manufactures representative (S. Conley Sales, Inc.) for nine years. In 2015, William joined the isiWEST team as a municipalities manufactures representative covering the state of MT and Northern tier counties of WY.

INCLINED ORIENTATION UV SYSTEM: The two most popular requests generated from facilities required to disinfect is to have an Ultraviolet (UV) system that produces more power in terms of UV output and to minimize the footprint. By recognizing the need for a compact, efficient, and potent disinfection system and learning from the existing treatment solutions available, the inclined orientation system was developed.

Traditional UV systems require long channels to accommodate the entirety of the lamp length and were not efficient with their use of space (having a large space between banks). While UV systems utilizing vertical lamps have a reduced channel length, the depth of the channel significantly increases compromising ease of installation and maintenance. To remedy these issues an inclined UV disinfection system was developed that maximizes all the space used to disinfect. The inclined system uses a 45° angle to maximize the disinfection time in the channel, minimize the depth of the channel, and provide maintenance accessibility.

Central to the tight footprint layout is the ability for the inclined UV modules to actually overlap one another in series. The 45° angle design minimizes the distance between modules (~4 feet) and produces a tight disinfection zone with no wasted space. Furthermore, the inclined design reduces the depth of the channel versus vertical systems by as much as 37%. Couple this design with the development of a more potent, yet energy efficient, lamp and you have a UV disinfection system that is capable of treating flows within a very compact footprint.

The newly developed low-pressure, high-output (LPHO) lamp operates at a power of 600 W. The new lamp was able to accommodate the 600 W, maintain power economies of the entire system, and maintain the same arc length as the traditional horizontal lamps. The inclined system can treat the same flow with as little as 50% fewer total lamps when compared to traditional UV systems.

Since the UV module head is strategically placed at the top of the channel, it provides the operations staff an easy way to access equipment above water. With the inclusion of an automating lifting mechanism that is integral to each UV module, below water equipment can easily be accessed as well.

Maximum residence time, a 37% reduction in channel depth, and lamp output that is double its predecessor are all unique features that make UV disinfection economical for large treatment systems with the inclined orientation design. This design method has now been implemented in installations throughout the United States.

Learning Objectives:  By the end of the session, participants will be able to Understand the latest innovations in open channel UV systems for disinfection of wastewater treatment plant effluents.  This will benefit anyone looking to add UV to their wastewater treatment plant, or upgrade their older medium pressure UV system.