Solutions for Odor & Corrosion Control

Providing solutions not just products

Local representative since 1996 www.GoTDM.com800.300.2844

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 FedericoTechnical 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 Scavengerwww.GoTDM.com

www.GoTDM.com

We provide solutionswe 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

What is an odor exactlyOdor 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

Defining odors

Malodor Odor Description Odor Threshold Hydrogen Sulfide Rotten eggs 3 ppb Mercaptans Skunk, rotten cabbage,

putrid garlic 20 ppt to 300 ppt

Carbon Disulphide Rotten vegetables 200 to 800 ppb Dimethyl sulphide Decayed vegetables 1 ppb Indole, Skatole Fecal, nauseating 100 ppt Amine Putrid, fishy 400 ppt to 100 ppb Ammonia Pungent, irritating 17 to 50 ppm

“Sewage Odors”

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

What is Odor Control Exactly ??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

Neighbor

Lift Station

TreatmentTechnologies

Biofiltration Basics

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

Simple Schematic of conventional system

1st & 2nd Generation

Just because something looks good on paper does not mean it will work in the field

Sizing Criteria 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

Second Generation

Better but not good enough

• 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

Second Generation

Random Packed Media:

Void or pore volume is all that really matters – and they fall short

Effective bed volume

Water build up and dry spots render another portion as useless

Dry = no bacteria and no solubilization Water and biomass buildup block the air sending it elsewhere

So what is the actual effective EBCT ????

More advanced (Structured) Media

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

Third Generation

Structured Packing

Structured Packing Bacteria Growth

Air flow

Water Layer

Vessel Size

Structured Packing

Air flow

Water Layer

95 % Void Volume

Vessel Size

Air flow

Water Layer

no Water Buildup

No dry spots

100% media utilization Vessel Size

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

Pretty Simple

One spray nozzle = even distribution of water

No recirculation of water

No humidification system

Control the water –► control the air, control the bugs

Simple Rule, Simple System

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 ?

Structured Packing Bacteria Growth

Air flow

Water Layer

Taking it one step further

› 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

Biomass Engineering 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

H2S

TRS

Aldehydes, Ketones

Mercaptans

Lighter VOC’s

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

Most InstallationsWorldwide

100% success rate

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

Oxidizers 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

Which one is right for me?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

Better Design, Better Support

Other Products

Another method is to permanently eliminate the H2S and Mercaptans using a little chemistry

Sulfa Clear from Weatherford

What is Sulfa-Clear

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

Safe & easy to work with Non-Hazardous Non-Flammable Freeze point in excess of -

20F No special storage

considerations No mixing required

Why Use Sulfa-Clear 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

Designing an odor control system

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 Removal efficiency H2S 99% plus Aldehydes 90-99% Ketones 90- 99%

Mercaptans: 75-85%DMS/DMDS : 65-75%VOC’s 55-85% ( depending on weight, etc)

What is biofiltration really ??

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 contaminantsThen create the ideal environment for these multiple bacterial colonies to do their work without impeding the airflow

Sizing Criteria 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

DerryBased 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

Compound Removal efficiency H2S 99% plus Aldehydes 90-99% Ketones 90- 99%

Mercaptans: 99%DMS/DMDS : 99%VOC’s 95-99% ( depending on weight, etc)

Combined Efficiency of dry media unit

DerryTA- 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

COMPOUNDINLET(PPMV)

After Bio

After Primary Media

After Secondary media

Hydrogen Sulfide 10.15 0.203 0.00203Carbonyl Sulfide 0.8 0.2 0.01Methyl Mercaptan 8.54 2.135 0.10675Acetaldehyde 2.51 0.3765 0.018825Isobutyraldehyde 4.28 0.642 0.0321isovaleraldehyde 8.54 1.281 0.06405p-cymeme 0.882-methylbutanal 7 2.1 0.105

Derry

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