There are many technologies that are currently employed in controlling odor from the sewage and wastewater. These technologies are important because every process done - collecting sewage, conveying wastewater or treating the sewage – could generate smell that could be undesirable to the environment around the facility where the process is done. The odor is most commonly coming from the collection system and during primary treatment because of conditions that are septic and anaerobic. Anaerobic condition happens when limited oxygen is being transferred to the wastewater because the microbes present in the water needs enough oxygen for respiration. When this happens, the microbes thrive and the result is hydrogen sulphite which has a strong odor that is quite offensive. Here are some of the technologies that can be used to control odor in treatment facilities.
- Noflex Digester. In order to make sure that marine sanitation device is working at an optimum efficiency, Noflex Digester is used to neutralize chemicals thereby destroying any anaerobic bacteria that are causing the odor. Oxygen is released in the sewage plant be dissolving the piping system’s sludge build-up. As it liquefies, oxygen is simultaneously released into air inside the system making the anaerobic bacteria grow and stay healthy which means a sewage system that is free from any odor. The digester could be used in any other parts of the sanitation system to make sure that pipes and sewage tanks are clean.
- Vapor phase. Through this method, the source of the odor is being ventilated. During air treatment, the negative pressure must be maintained in the ventilation system in order to make sure that nuisance odor will not leak through vents, manways or any access hatch. The only way that the odor could escape is through the ventilations discharge. From there, the odor problem must be prevented or controlled through treatment.
- Biofiltration. For contaminants that are water soluble and biodegradable, this type of technology is ideal. One the contaminants are solubilized, it changes from vapour to the aqueous phase. Odors that are sulfur-based are effectively removed using biofilters.
- Wet air scrubbing. For all contaminants that are water soluble, this technology is the perfect solution. It treats the contaminants that are causing the undesirable smell. The mechanism used in odor removal is purely chemical.