H₂S Converting/Oxidizing/Polishing Media

Print Equipment Data
(Includes submittals & O&M Manuals)

 AN ADVANCEMENT IN ODOR CONTROL TECHNOLOGY

PEACEMAKER^TM Dry Air Scrubbers provide two or three stage chemistry for the control of odors from hydrogen sulfide (H₂S), mercaptans, ammonia, amines and other odors generated in wastewater collection and treatment systems. They are easy to use, effective and economic.

	Lift Stations
	Headworks
	Grit Rooms
	Sludge Processing

In what follows, when we say “odor” we mostly mean H₂S. We know there are other reduced-sulfur and nitrogen-based compounds involved and we have planned for them, but H₂S is the main culprit and is most important in discussion and design.
 

OUR DESIGN PRINCIPLE.....SIMPLICITY

“The Best Solution Should be the Simplest, but Not Simpler.” – Albert Einstein

Often it is the simplest solution that works the best. Complexity is the enemy of effective, long-term odor control. Too much fussing, too many bells and whistles spell trouble.

Peacemaker scrubbers are one or two vessel fixed-bed systems, containing two or three stages of media depending on the levels of H₂S.

There is one moving part, a blower. Only one thing can happen - foul air goes in, clean air comes out. There are no chemicals to add and there is no maintenance to do for the service life of the scrubber. When your Peacemaker does need attention, the entire scrubber is replaced or the media is replaced, depending upon the size of the scrubber and whether you choose to lease, buy or a service contract (more on this later).

But no matter how simple and easy, odor control solutions must be effective to be worthwhile.
 

 PEACEMAKER^TM SCRUBBERS GET THE JOB DONE

STAGE ONE - PERSNICKETY© H₂S CONVERTING© MEDIA
Converting technology uses a patented polymeric amine, formulated for maximum removal of H2S and volatile mercaptans. The combination of multiple amine sites and organophilic properties allows for fast, efficient removal of these problematic compounds. This chemistry reacts with H₂S and mercaptans to form water-soluble and non-volatile poly sulfides that are readily biodegradable. In simple words, gaseous H₂S is turned into a stable liquid polymer. All of our scrubber systems are designed to achieve a minimum H₂S reduction of 90%-99% through the Stage 1 media bed.

STAGE TWO - PERSNICKETY© OXIDIZING© MEDIA
Chlorine Dioxide (ClO₂) is an extremely powerful oxidizing agent. Because it reacts selectively and primarily with only the most offensive odor-producing compounds (H₂S, organic sulfurs, organic amines), this media will normally provide a much longer service life than products such as chlorine, hypo chlorite, hydrogen peroxide and potassium permanganate. Unwanted reactions do not occur. Power is not needlessly spent. (ClO₂) remains available and ready on demand. All of our scrubber systems are designed to achieve a minimum of 99% through the Stage 2 media bed.

STAGE THREE - PERSNICKETY© POLISHING© MEDIA
Activated carbon does a very efficient job of scrubbing low levels of H₂S and other malodors. 99% of the H₂S and the majority of volatile mercaptans, organic amines and organic sulfurs are removed in the converting and/or oxidizing beds. With that being accomplished, the polishing bed will easily remove the remaining low level malodors. This results in complete and economic odor control.
 

CORROSION CONTROL

It Isn’t Always Just About Odor

Corrosion control is a substantial secondary benefit, and in some cases it is primary. H₂S accumulates in enclosed spaces. Turbulence releases it to atmosphere, but Henry’s Law is in play, too. It is not unusual to find several hundred ppm of H₂S in enclosed spaces. It eventually forms sulfuric acid, a highly corrosive compound. In most cases, H₂S cannot simply be exhausted into a neighborhood. But when it is continuously drawn off and scrubbed, corrosion commonly reduces by ninety percent or more, and complaints stay in check.
 

SIZING PEACEMAKER^TM SCRUBBERS

THERE ARE TWO ESSENTIAL QUESTIONS TO BE ANSWERED.

How much airflow is required?
Benefits accrue from moving only enough air to maintain a slight negative pressure. This will prevent fugitive malodors and provide the best economics. Higher-than-necessary airflow increases static pressure through the media bed and reduces residence time. A larger scrubber may be needed and cost would increase.

To calculate optimum airflow we must determine the potential for air displacement (e.g. gpm pumped into a wet well). Of course, if there is an air exchange requirement for confined space entry or a need for higher airflow for any other reasons, it can be accommodated.

How much H₂S is in that air?
This can be a difficult question to answer. It can be influenced by time of day, time of year, residence time, measuring techniques and numerous additional factors. Truth is it is hard to escape applying some judgment in making this determination. Experience helps, of course, but Peacemaker systems have built-in flexibility and scalability, which helps, too. Ultimately, the formula is simple: cfm airflow x ppm H₂S = quantity of media required.

This is an important process, and we need to work together. We start with a review of Form No. 550A-NG, “Information Required for Sizing PEACEMAKER™ H₂S Converting/Oxidizing/Polishing Dry Air Scrubbers”.

AVAILABLE SIZES
When we have determined the quantity of media required, we simply match that need to the correct vessel size and add the right fan to provide desired airflow at the existing static pressure.
 

LEASE, BUY OR SERVICE CONTRACT?  YOUR CHOICE!

Lease
The length of “term” for most PEACEMAKER^TM leases is one to three years. At the end of term, we provide a new scrubber, if you wish, and you return the old one to us, freight collect. If conditions change from one term to the next, we can change the new scrubber to match the new conditions. You will never be stuck with out-grown and useless equipment. In addition, our lease agreement is like our scrubbers – simple and straightforward.
 

Buy
If your PEACEMAKER^TM needs to come from a capital budget, this is obviously the way to go. It will still be a great value. Lease or buy, labor and maintenance costs will be minimal. There just is not much to do once the scrubber is up and running besides enjoying the nice clean air and the very quiet phone.
 

SERVICE CONTRACT
The length of "term" for most PEACEMAKER^TM service contracts is three to five years. With a service contract, H₂S loadings and CFM would have to be well documented and we would guarantee the life of the scrubber system for the life of the service contract based on those levels.
 

SUPPLEMENTARY INFORMATION

FORM NO.

• 550C-NG -- PEACEMAKER™ H₂S Converting/Oxidizing/Polishing Blower Specifications Summary

• 550E-NG -- PEACEMAKER™ H₂S Converting/Oxidizing/Polishing Standard Scrubber Models Specifications

• 550A-NG – Information Required for Sizing PEACEMAKER™ H₂S Converting/Oxidizing/Polishing Dry Air Scrubbers

The same media technology is used in other devices for odor control:

FORM NO.

• 575-NG - PEACEMAKER^TM Odor Control Manhole Inserts

Limited Warranty:
Our only obligation shall be to replace or pay for any material proved defective.  Beyond the purchase price of materials supplied by us, we assume no liability for damages of any kind and the user accepts the product "as is" and without warranties, expressed or implied.  The suitability of the product for an intended use shall be solely up to the user.