Wastewater odor is a nuisance and in many cases can cause corrosion to wastewater infrastructure to sewer systems, valves, metal structures and electrical components. Depending on the odorous compounds involved, there can also be a danger to public health. Odors originate as the organics in the wastewater breakdown, releasing a range of compounds that have unpleasant smells that can be described as rotten eggs, decaying vegetation, ammonia and more. Evoqua provides a broad range of solutions for effective wastewater odor control including biological, chemical, and activated carbon scrubbers, as well as liquid phase solutions for both sewer networks and in-plant odor and corrosion control.
What causes odor in wastewater?
The chart below provides details of the most common odorants found in wastewater. While organic and amine odors can be a nuisance, the primary wastewater odor of concern is hydrogen sulfide gas (H2S). Concentrations of H2S as low as 0.0005 ppm can trigger odor complaints from the surrounding community and in higher concentrations can cause significant corrosion or even be toxic.
|Allyl Mercaptan||Strong garlic, coffee|
|Amyl Mercaptan||Unpleasant, putrid|
|Benzyl Mercaptan||Unpleasant, strong|
|Diamines (cadaverine)||Decayed flesh|
|Dimethyl Sulfide||Decayed vegetables|
|Ethyl Mercaptan||Decayed cabbage|
|Hydrogen Sulfide||Rotten Eggs|
|Methyl Mercaptan||Decayed cabbage|
|Sulfur Dioxide||Pungent, irritating|
The good news is that all of these wastewater odors can be controlled with the right treatment solution. Evoqua offers a wide range of equipment and services that can be optimized to effectively control odors in your wastewater system. As a result, you can effectively eliminate odor complaints, reduce corrosion and protect public health.
A liquid phase dosing program can also be used to prevent odorous compounds from forming in wastewater with biological, chemical, activated carbon, and hybrid scrubber systems used to help facilities effectively collect and treat odors. Evoqua also provides odor containment cover solutions to assist in containing and collecting odors.