UICN Pahrump Oxygenation/Ozonation System

Utilities Inc. of Central Nevada (UICN) Pahrump had an issue with odor control and their levels of H2S were significantly high. The project involved 4 lift stations and 1 WWTP with 600 kgpd: (see diagram below)

  • Lift Station 4 has two 8” forcemains traveling 3000ft. to a manhole.  From the manhole, a 21” gravity line travels 2000ft. and right before reaching Lift Station 3, there is an additional gravity flow coming in from uptown and a residential area.
  • Lift Station 3 has a 10” forcemain going to the WWTP No. 3.  Before it reaches the WWTP, another 1000ft. of forcemain intersects coming from Lift Station 2. Further down, another 800ft. forcemain intersects coming from Lift Station 1.

Valentine conducted a study and evaluated the H2S levels at various stages, and conducted a pilot test for the target area to determine the most efficient and cost effective solution.  They analyzed three options: 1) ferrous at LS3 and LS4, thioguard at LS4, and oxygenation/ozonation system at LS4.  UICN Pahrump chose to install the oxygenation/ozonation system based on:

  • H2S reductions of 90% at LS3 and 44% at WWTP No. 3 (see diagram below)
  • Cost savings over time primarily in chemical and maintenance expense
  • Operational and maintenance benefits
  • No chemical usage and handling
  • Environmentally friendly
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Trial Results2 at Lift Station 3
Trial Results at Lift Station 3
UICN Pahrump Diagram
UICN Oxygenation/Ozonation System
UICN Oxygenation/Ozonation System - front view