Odor Control Selection

Posted by Anthony DeLoach, President on Aug 16, 2018 9:03:00 AM

What type of Odor Control Scrubber do I select?

It's a common question many customers and design professionals ask in the Odor Control Industry when it comes to selecting, engineering, and making the decision on the best type of odor control process to utilize to treat off gases and noxious odors. Selecting an odor control system is comparable to choosing a car in many ways because you have a lot of different options to choose from and each odor control scrubber comes in different types to address the different variations within the industry.  As an example, there are odor control scrubbers designed to treat “ammonia” gases and other ones to treat“acid” off gases.  Or there are odor control scrubbers that utilize “acid” or “caustic” as the scrubbing reagent in the process to neutralize an off gas.

Odor Scrubber MediaOdor control scrubbers also come with different purchase prices and each have different operating costs associated with them.  It is always important to analyze the operating cost of the odor control solution you select because there may be several different types that may all perform equally and each may have varying initial purchase costs but you should ask the question and understand “what will be the continued operating cost” be for the type of odor control system selected.  And how long will the scrubber I selected last before additional costs are needed for any major repairs to keep it running? When you are a design professional if you choose the odor control system that is difficult or expensive to maintain then you can be assured you will have continued phone calls from customers looking for answers and solutions.  

water brainVery soon the industry may change with the adaption of “artificial intelligence” as AI is slowly incorporated into the market.  Companies like DeLoach Industries are now incorporating the first variation of artificial intelligence into their odor control scrubber line of products to help owners and operators with real time information and data communications.  Just remember that there are many types of odor control systems that work and remove odors but selecting and designing a system that works efficiently and effectively without breaking the bank can be challenging.  A design professional should evaluate the cost of the reagents utilized in an odor control scrubber at any specific location because the cost of “caustic” in one location may vary from another.  Or the cost of “acid” as another example may have different base cost or handling cost and considerations.  For a design professional and for the supplier of the system it is important to consider what an owner and or their operators will be faced with to maintain the odor control system over the long term and what the anticipated operating cost will be both on a day to day basis and on a long term service replacement basis.

Odor Control systems come in different types

of processes and most manufactures or sales representatives will recommend what they are most familiar with or what they sell. This does not necessarily mean that the process types they are representing as the best system will not work but it could however mean that it may or may not be the best choice or offer the most cost-effective treatment. Let’s step back and look at different types of odor control process and examine briefly what each process offers and what if any limitations they each have. First, we will dismiss the variety of “masking agent systems” as odor control scrubbers not because they may not have a place in the market but more rather because they do not actually “react” or “convert” the odorous or corrosive gas into a neutral form of gas. Instead they only just cover up the odorous gas in the same manner as when you add room freshener to improve the smell of a room and hide the bad smell. For this reason, we will only discuss what we believe are real active types of odor control scrubbers.

Rotten Egg Man smelly

A traditional odor control scrubber process that has been around for years is known as a “chemical scrubber” and much like the name indicates this type of odor control scrubber utilizes and depends upon one or more chemicals to “react” and “convert” an odorous gas into a different form of gas and to neutralize the odorous smell.

Chemical odor control scrubbers often come in “single or dual” pass systems and utilize scrubbing reagents like “caustic” or “acids”.  The term single or dual pass means there are one or two packed vertical packed columns in series to provide the required mixing and reaction time needed. There are also times that there is a need to have two or more towers in series because it takes two different types of reactions to treat the odorous gas such as “hydrogen sulfide” and the chemicals like “caustic and acid” needed require independent mixing and contact with the gas to neutralize the odor or neutralize the corrosive gas when treating lower pH off gas streams. If the in-fluent gas concentrations are high enough an operator or owner could experience weekly or monthly cost related solely to tower maintenance such as cleaning and media replacement (artificial intelligence will soon let you know) if the tower is not properly designed for the anticipated heavy concentrations. In addition to the high consumption of chemicals the tower may require neutralizing the odorous gas. When designers at DeLoach Industries examine an off-gas stream that has odors or corrosive “acid type gases like “hydrogen sulfide” gas we run simulation models and calculations to examine both the initial capital cost of the equipment, its performance capabilities, and the ongoing operational costs. We understand that quite often operational cost always is greater than the initial capital cost. In additional to chemical odor control scrubbers there are also different types of systems including; Biological Scrubbers for “hydrogen sulfide” treatment, carbon absorption scrubbers for other forms of VOC’s, and chilled water scrubbers for “either”.  The professionals at DeLoach Industries are available to assist you in your design process. Please give us a call at (941) 371-4995.

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Topics: water treatment issues, water quality, degasification, pH levels of water, odor control, water treatment, advanced treatment solutions, biological scrubber, water plant, odor control scrubber, hydrogen sulfide (H2S), pH levels, degasifier, gases

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