Photo Compliments of Anue Water Technologies
Photo Compliments of ECO2 Laguna Beach LS, CA

The Odor Control Struggle and What To Do About It




      • Improves odor and corrosion control
      • Reduces operating and maintenance costs
      • Improves overall performance


Oftentimes in sewage collection systems that utilize forcemains, there is a wide range in diurnal flow which causes sewage to sit or flow slowly in the forcemain for extended periods of time.  The onset of anaerobic activity and hence production of sulfides from sulfate occurs during these time periods resulting in high hydrogen sulfide odors at downstream lift stations or treatment plants.


Many municipalities utilize chemicals such as chlorine, ferrous salts, peroxide, bioxide, etc., to reduce the production of hydrogen sulfide downstream.  They are challenged with these methods to provide effective odor control at a reasonable cost to operate and maintain.   These methods are band aid solutions that do not address the real issue – the onset of an anaerobic condition.  As a result, they are dissatisfied with the impact on their wastewater treatment and the release of odors into the atmosphere.


Valentine has conducted studies to examine old and new technologies to evaluate real time situations, and determine more sustainable and efficient solutions.






If the anaerobic conditions are removed from the forcemain, there is no possibility for sulfides to form.  Oxygen or a combination of oxygen and ozone is used in place of chemicals, forcing the environment in the forcemain to go from anaerobic to aerobic.  Once in the aerobic state, the bacteria that reduce sulfates to sulfides can no longer survive.  Several companies have developed oxygen/ozonation feed systems for injection into the sewer to solve the odor control problem – Anue, BlueInGreen, ECO2.  These methods replace the traditional treatment chemicals to offer a safer and more environmental sustainable solution.



Besides treating the systemic problem of H2S formation, the use of oxygen/ozone offers many other benefits:


      • Delivers proven odor control or H2S removal – better removal than other technologies, and in some cases there is virtually no H2S at discharge point, and continued odor control through downstream processes.
      • Eliminates handling of hazardous chemicals
      • Reduces corrosion of equipment
      • Reduces the system footprint
      • Reduces the overall life cycle cost – energy, operations, and maintenance


Valentine provides turnkey water and wastewater systems development from program management to permitting and design, from operations support to construction phase services, their “waves of excellence” delivers the right water solutions specific to your facility.

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