Providing solutions not just
products
Local representative since 1996
www.GoTDM.com
800.300.2844
Turnkey System integrator and distributor –
proving regional field service and
installation
New company – cooperative venture
including TDM and Gasho Associates
More capabilities including field service of
equipment
Developing new technology for dry media
System Integrator
Contacts
TDM:George Federico
Technical Assistance – proposals, etc
Gasho Associates – Shaun Kelley
local sales Rep –
Offering multiple technologies
 Biofilters
 Carbon/media system
 Chemical scrubbers
 Thermal oxidizers
 Odor prevention
 Offering the best technologies
 OdorTool Biofilters
 Theia Air Carbon & Dry media
 Altech Scrubbers
 Colt Technolgies - Oxidizers
 Venturi Aerators
 Weatherford H2S Scavenger

www.GoTDM.com
We provide solutions
we work with you to find the best solution for you and
your client – we do not force fit what we sell to the project
Knowledge and experience
We know the technologies and are experts in treating air
and odor
Scope of supply to fit the project
every project has different requirements. We can
provide turnkey systems and even install them or just
components - your call
www.GoTDM.com
The TDM/Theia Air difference
We work with you when you are designing your
system, installing your system and for years
afterwards – all systems and equipment can
have problems – we will be there for you if ours
does
We will be there for our customers –
even when it is not our equipment
www.GoTDM.com
The TDM/Theia Air difference
We provide a total approach to odor control.
This means everything from collection to
dispersion
www.GoTDM.com
Odor is a sensory reaction to one or more
aromatic gases.
Like noise, it is a perceived offense.
Like Noise, this somewhat nebulous term CAN
be scientifically defined
We define one OU ( odor unit) as the
point at which the “average person”
begins to detect an odor
Malodor
Odor Description
Hydrogen Sulfide
Mercaptans
Rotten eggs
Skunk, rotten cabbage,
putrid garlic
Rotten vegetables
Decayed vegetables
Fecal, nauseating
Putrid, fishy
Pungent, irritating
Carbon Disulphide
Dimethyl sulphide
Indole, Skatole
Amine
Ammonia
Odor Threshold
3 ppb
20 ppt to 300 ppt
200 to 800 ppb
1 ppb
100 ppt
400 ppt to 100 ppb
17 to 50 ppm
Removing some of the compounds will reduce
the odor but may not eliminate the problem
We must reduce all of the odorous compounds
to be successful
Simply put, we are trying to prevent
odorous compounds from reaching sensory
perceptors ( people)
Before we design the
treatment equipment, we
should define what is
required to meet this goal
Dispersion
Modeling
In general, contaminated air passes through a
fixed bed of media
Media has a thin film of water on the
outside
Contaminant gases are solubilized into this
film of water where they can be digested by the
microbes
Just because something looks good on
paper does not mean it will work in the
field
Surface Velocity –must be slow enough to allow
capture – this affects the diameter of our unit but is
not usually in play,
EBCT – residence time, contact time, etc –a
relatively useless measure, on its own, used by
engineers to try to normalize a bid –
useful EBCT or pore volume is what actually
matters – not unlike carbon.
To some extent, the more pore volume, the better
the performance but there are diminishing returns
Media Makes a Difference !


Synthetic media is now widely used – media does
not break down
The media will last but the performance is still not
there
Random Packed Media:
Void volume only 35% (Less Effective EBRT)
poor water distribution poor air flow
No means for control of biomass
Higher Pressure Drop, increases over time
Un-Predictable performance
Media is typically treated with chemicals, food,
etc
•
•
•
•
•
•
Void or pore volume is all that really matters – and they fall short
Effective bed volume
Dry = no bacteria and no solubilization
Water and biomass buildup block the air sending it
elsewhere
Water build up and dry spots render
another portion as useless
So what is the actual effective
EBCT ????
Dual Zone Bed; Zone A provides an optimal area for a
robust colony of bacteria to reside while Zone B is
the “transfer zone” .
Void Volume >95% (Effectively increases EBRT)
Complete treatment, due to uniform distribution of air
Low pressure drop, will not increase over time
Maintains its structure over life ensuring predictable
performance
Bacteria
Growth
Air flow
Vessel Size
Water
Layer
Water
Layer
Air flow
Vessel Size
95 %
Void
Volume
100% media utilization
no
Water
Buildup
Water
Layer
Air flow
Vessel Size
No dry
spots
Most Systems are
overly complicated
• larger media beds – big footprint, very
heavy
•Typically very expensive
•Humidification systems – complicated –
require a lot of maintenance
•Multiple spray nozzles
One spray nozzle
= even
distribution of
water
No recirculation
of water
No humidification
system
Control the water –► control the air,
control the bugs
Most biofilters fail due to poor
control of the water
– uneven water = uneven air = poor
treatment = poor biomass
By controlling the flow of water
through the system we control the
air flow keeping it evenly
distributed
What does the air flow pattern look like
here ?
Bacteria
Growth
Water
Layer
Air flow
› Biomass control.
 Getting a strong healthy
bacteria colony to grow is
important but is only part of the
battle
 Keeping this biomass from
fouling or otherwise interfering
with the equipment is just as
critical
 Multiple
contaminants require
multiple bacterial colonies
 This requires multiple strata to
develop which strongly favors a taller
media bed
 We do not recirculate the water
which allows this stratification to take
hold
Lighter
VOC’s
Mercaptans
Aldehydes,
Ketones
TRS
H2S
Odortool biofilters are compact, require little
or no maintenance and use little water and no
chemicals
These systems offer high removal efficiencies
and very low operating costs
Permanent media means no replacement
concerns
Taking on your toughest applications without
all the mess and expense of wet scrubbers.
New media that can take on the highest
levels of H2S & mercaptans without a big
footprint and without changing the media
out frequently
Thermal Oxidizers are effective on sludge
applications
RTO’s ( Regenerative Thermal Oxidizers)
are the best approach – lowest
maintenance and lowest operating costs
They are slightly more expensive than
RCO’s ( Recuperative thermal oxidizers)
– usually 5-15%
we offer skid mounted and field erected
RTO’s ( Regenerative Thermal Oxidizers to
treat any size air stream – we also offer
RCO’s
Biosolids, Sludge, drying, etc is our specialty
We offer upgrades and retrofits to existing
units to reduce your operating costs
•27 years of experience
•Full field capabilities
•Safe, reliable design
For sludge drying and other low VOC applications,
RTO’s are the best choice.
•RTO’s use a lot less fuel
•RTO’s require a lot less maintenance
•RCO’s typically require a rebuild after 5-7
years due to the heat exchangers rusting
out
Structured media
Our design allows for removal of heat
recovery media from the chambers
quickly and easily
Media can be cleaned and put back in all
in one day
This will be required once every 2-3 years
Colt is the recognized leader in Thermal
Oxidizers but we do not stop there
We offer the best field and technical support of
any company
We spend a lot of time replacing or fixing our
competitors units
Other Products
Another method is to
permanently eliminate the H2S
and Mercaptans using a little
chemistry
Sulfa Clear from Weatherford
 Patented technology from the oil & gas
industry that safely and effectively
eliminates H2S
 Proven over 20 years of history
 Polymeric Amine Condensate that
converts sulfides to a Polyamine Sulfide
 Introduced at a single or multiple
injection points
 Non-Hazardous
 Non-Flammable
 Freeze
point in excess of -20F
 No special storage
considerations
 No mixing required
Permanently eliminates H2S &
mercaptans
 Is specific to these compounds – can be
added in one place
 Reacts to form a corrosion inhibitor
 No solids build up
 Environmentally friendly
 Ease of handling

There are several important steps
to designing the best odor control
system for your your project
We are here to help
There is no one right technology for all applications
Often a single technology is not the best
approach
Especially for a complex mixture of odors as
we see in sludge handling
For these applications the two main
approaches are
Biofilter/carbon
Oxidizer
Start with Biofiltration
Biological Treatment is most effective on
compounds which are soluble or partially
water soluble
Compound
H2S
Aldehydes
Ketones
Removal efficiency
99% plus
90-99%
90- 99%
Mercaptans: 75-85%
DMS/DMDS : 65-75%
VOC’s 55-85% ( depending on weight, etc)
It is the capture and destruction of
compounds using a complex combination
of bacterial colonies which consume the
various contaminants
We must first capture the contaminants
Then create the ideal environment for these
multiple bacterial colonies to do their work
without impeding the airflow
Surface Velocity –must be slow enough to allow
capture – this affects the diameter of our unit but is
not usually in play,
EBCT – residence time, contact time, etc –a
relatively useless measure, on its own, used by
engineers to try to normalize a bid –
useful EBCT or pore volume is what actually
matters – not unlike carbon.
To some extent, the more pore volume, the better
the performance but there are diminishing returns
Based on a flowrate of 600 CFM, we can use our
second smallest series, 1500 which indicates a 5 foot
diameter media bed
Because of the variety of compounds present, we want
as many layers of media as possible. 3 layers is the
maximum number for these smaller systems and we
have a height and size limitation.
We check the initial design to verify the design point.
Based on the number of CFU’s required and number of
colonies, this is sufficient media volume and height to
achieve 90-95% odor removal through this stage
Next – look at dry media
As with Biofilters, design is everything –
stuffing a bunch of carbon into a drum is not
going to cut it
We utilize 2-5 different medias depending
on what we are expecting to see
Combined Efficiency of dry media unit
Compound
H2S
Aldehydes
Ketones
Removal efficiency
99% plus
90-99%
90- 99%
Mercaptans: 99%
DMS/DMDS : 99%
VOC’s 95-99% ( depending on weight, etc)
TA- OC –
• surface modified media – removes H2S and other reduced
sulfur compounds as well as some nitrogen molecules
•It is also a virgin carbon that will remove some VOC’s –
heavier ones
TA-OM –
•Chemically impregnated media – oxidizes the more difficult
compounds and captures them –
•Very effective on mercaptans as well as DMS, etc
TA-VCC
•Virgin carbon – microporous – removes the most aromatic
compound
0.203
0.2
2.135
0.3765
0.642
1.281
2.1
After
Secondary
media
After Primary
Media
10.15
0.8
8.54
2.51
4.28
8.54
0.88
7
After Bio
INLET(PPMV)
COMPOUND
Hydrogen Sulfide
Carbonyl Sulfide
Methyl Mercaptan
Acetaldehyde
Isobutyraldehyde
isovaleraldehyde
p-cymeme
2-methylbutanal
0.00203
0.01
0.10675
0.018825
0.0321
0.06405
0.105
Because dry media is consumable,
we must check the usage of the
media to verify that we will have
sufficient bed life to achieve the
required odor removal for the
prescribed period of time before the
media requires replacment.
Final step ( is actually based on the first
one)
Dispersion enhancement –
basically we are using our
surroundings as well as our
discharge to mix what little odor
remains with as many air
molecules as possible so that by
the time the off-gas reaches
people, we are below one OU