ODOR CONTROL
The public is mostly aware of the things that odor can bring, that is why advancements are made to deal with odor control effectively. Odor control products are made and strategies are used to help us with such concerns. Below is a list of some odor control technologies that intensively works on removing the contaminants in the air.
Adsorbers and Activated Carbon
Adsrobers is the term used to the way pollutants attach to the activated carbon through a chemical attraction. Adsorbers are usually making use of empty activated carbon or alumina pellets which are saturated with permanganate in eliminating odors. Activated carbon is used in removing out variety of vapors such as organic, inorganic, or even metallic vapors. Activated carbons adsorb a wider range of contaminants like gas, odor, and the chemical toxins present in the air. Activated carbons have a porous surface that traps the pollutants in. As the toxins and they pollutants pass through the porous of the activated carbon, they are directly attracted and captured within. The molecules are attracted and then attached to the pore surfaces through the mechanism called Van der Waals forces.
Chemical scrubbing
Chemical scrubbing’s main goal is create a contact between the odorous air, water, and chemicals to let oxidation and entrainment happen on the odorous compounds. These compounds are absorbed into the scrubber liquid where odorous compounds are oxidized and removed from the scrubber as an overflow. Sodium hydroxide, amine, chlorine, sodium hypochlorite, potassium permanganate, ozone or hydrogen peroxide, and diluted sulfuric acid are the most commonly used chemicals used as absorbing solutions.
Liquid scrubbing of gases can either involve adsorption in solvent or chemical treatment with a reagent. This odor control technology is more economically attractive than the use of activated carbon especially when it used to treat to an odorous gas which is greater than 5000 cubic meters.
Biofiltration
Biofiltration is an odor control technology used for biological odor control. This involves the removal and oxidation of organic gases from the air contaminants by a biofilter media. The odor is removed using a biological process known as bacterial action. Bacteria undergo a self-sustaining process where the odorous gas and bacteria have an intimate contact.
This is usually involved in processing waste water, capturing harmful chemicals in surface runoff, and microbiotic oxidation of contaminants in the air.
Bioscrubbers
This odor control technology applies the combination of the principles in scrubbing and biofiltration. Bioscrubbers uses artificial media and closed vessel construction. Biofiltration on the other hand, uses a natural method and an open bed construction.
The process of using bioscrubbers involves intermittent spraying of biologically active scrubbing solutions which are nutrient-rich over an artificial media as the odorous air is forced to motion upwards through a media bed. The media provides an area for a biological colonization as it endorses mass transfer from the air to the water film on the site where the biological oxidation occurs.