|Odor Control Case Study #1 / Odor Control Case Study #2 / Odor Control Chart
Odor Control and Odor Abatement
Tri-Mer Scrubbers Yield
No Odor at the Stack
Tri-Mer systems are ideal where performance must be continuous and unattended. Applications include chemical plants, petrochemical facilities, municipal waste treatment, asphalt manufacturing, foundries and food processing. The volume of gas that can be accommodated is virtually unlimited, but generally ranges from 35 cfm to 150,000 cfm. Because some odors are detectable below 1 ppm, Tri-Mer odor control systems function at efficiencies of 99% and higher. Tri-Mer odor control systems are widely used for savory
cookers and essential oils mixing rooms.
Where the gas stream contains corrosives, Tri-Mer offers an equipment design capable of reducing odors
and corrosives. This system neutralizes corrosive fumes with minimal water and energy and yields a clean
stack. Tri-Mer standard odor control systems have multiple stages and are 99%+ efficient.
ODOR CONTROL SYSTEMS GUARANTEE
Tri-Mer odor control scrubber systems are guaranteed to reduce odors from onion and meat cooking
processes. Performance against specific compounds which testing has identified as being present
in measurable quantities and which are known to have offensive odors are outlined below:
Hydrogen sulfide: For inlet concentrations up to 4000 ppb, the concentration at the outlet
for the odor control system will be less than 1 ppb. This is the lowest reported odor concentration known to us.
Methyl mercaptan: For inlet concentrations up to 100 ppb, the concentration at the outlet
for the odor control system will be less than 0.05 ppb, which is within the range of reported odor threshold concentrations known to us.
Dimethyl sulfide: For inlet concentrations up to 1000 ppb, the concentration at the outlet
for the odor control system will be less than 0.3 ppb. This is the lowest reported odor threshold concentration known to us.
Carbon disulfide: For inlet concentrations up to 100 ppb, the concentration at the outlet
for the odor control system will be less than 16 ppb, which is the lowest reported odor threshold concentration known to us.
n-Propyl mercaptan: For inlet concentrations up to 2200 ppb, the concentration at the
outlet for the odor control system will be less than 5 ppb. This is within the range of reported
odor threshold concentration known to us.
TYPICAL DESIGN: MULTI-STAGE ODOR CONTROL SYSTEM
The gas is contacted with an acetic scrubbing liquid to neutralize the ammonia emission. H2SO4 ,
in a 10% concentration, is used down to a pH of 2. Tri-Packs, Tri-Mer's high-efficiency packing media,
is an integral part of the system; load inlet ppm determines packing depth. Scrubbing efficiency in
all cases is to below detectable limits.
Air is contacted with an alkali scrubbing liquid such as sodium hydroxide (NaOH with a maximum
pH of up to 13.5). Sodium hypochlorite and similar oxidizers are often added to complete the
Most Tri-Mer systems incorporate a dual tower design, with packing depth determined by odor
composition and efficiency required. This engineering concept is the most efficient due to counterflow operation. The system allows optimum control of recirculation solution chemical concentrations.
Tri-Mer odor control systems are flexible; if your process changes, a simple change of feed
chemical is generally all that's needed.
The ease with which Tri-Mer systems can be modified to accommodate new conditions is a
key reason why Tri-Mer systems are among the most widely-specified in the world for control
of industrial and municipal odors.
MULTIPLE LOAD CAPACITY
Tri-Mer odor control systems can simultaneously handle other contaminants in addition to the
specific odor for which they’re designed. These contaminants include particulate, other inorganic
compounds and a variety of reactive materials including acids and other gases native to
Some applications may require an activated carbon bed in addition to the wet scrubber
section to properly control odors. These carbon beds are available from Tri-Mer in vertical
or horizontal formats.
For applications that simultaneously generate odors and particulates, Tri-Mer’s
Whirl / Wet dust collector or CCS Cloud Chamber Scrubber can be incorporated.
See our Odor Control Scrubber Q&A Page for more information.
ODOR CONTROL CASE STUDY #1 / ODOR CONTROL CASE STUDY #2 / ODOR CONTROL CHART
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