Digester Gas
Scrubbing 		Gas Conditioning/
Siloxane Removal 		Odor Control Local Representatives Water Environment
Research Article		 E-mail

HYDROGEN SULFIDE REMOVAL
Odor Control Systems

A MARCAB Odor Control System is a welcome neighbor in many residential areas.

Specify a MARCAB Company, Inc. Odor Control System to eliminate hydrogen sulfide and other odors from your treatment processes.
WHAT IS HYDROGEN SULFIDE?
Hydrogen sulfide is a gas released by anaerobic bacteria found in nearly
ALL water collection and treatment processes.
In addition to being extremely odorous, hydrogen sulfide is corrosive and toxic.

MARCAB's mobile unit is ideal for evacuating a manhole before personnel enter without spreading odors and offending the neighbors, as well as for immediate response to odor complaints.

SAFETY & GOOD PUBLIC RELATIONS!

WHY REMOVE HYDROGEN SULFIDE?
Hydrogen sulfide, present at wastewater
and water treatment plants, collection facilities and industrial establishments, can reach concentrations in excess of 100 ppm. It is important to remove these sulfides because:
  • Sulfide emissions represent the primary
    source of odor complaints. The odor threshold
    of hydrogen sulfide is less than 2 ppm.
  • The sulfuric acid formed from hydrogen
    sulfide is extremely corrosive and is
    destructive to facilities and infrastructure.
  • Even slightly elevated concentrations of
    hydrogen sulfide are hazardous to personnel.
    Exposure to concentrations as low as 5 ppm
    can affect the eyes and lungs, increasingly
    higher concentrations quickly deaden
    the olfactory abilities, compounding the
    likelihood of more serious consequences
    eventually leading to death.
WHERE CAN MARCAB ODOR CONTROL SYSTEMS BE USED?
MARCAB has odor control installations from Coast to Coast in a large variety of applications:

Head Works Sludge Holding Tanks SBR's Wet Wells
Pump Stations Lift Stations Covered Clarifiers Siphons

Basically, ANYWHERE foul air can be captured MARCAB Odor Control Systems are Effective.
HYDROGEN SULFIDE REMOVAL VS. COMPLETE ODOR CONTROL
Hydrogen sulfide is the leading cause of odor complaints. In many cases removing the hydrogen sulfide, removes the offensive odor. The main component of a MARCAB Odor Control System is the time proven Iron Sponge technology. Iron Sponge has been used in scrubber systems to remove hydrogen sulfide for over half a century. Iron Sponge is a woodchip impregnated with hydrated ferric oxide which reacts with hydrogen sulfide to form ferric sulfide and water, thus removing the hydrogen sulfide from the foul-air stream:

Fe2O3 o H2O + 3H2S . Fe2S3 + 4H2O

The ferric sulfide then reacts with the water and oxygen present in the system to re-form hydrated ferric oxide and elemental sulfur, thus regenerating the bed continuously:

2Fe2S3 + 3O2 + 2H2O . 2Fe2O3 o H2O + 6S
This process continues until eventually the Iron Sponge is coated with elemental sulfur and is removed from the system, disposed of at a standard landfill and replaced with a fresh supply.In some cases, some odors still remain after the removal of the hydrogen sulfide. In these cases MARCAB adds a secondary stage to our scrubber systems consisting of a smaller amount of carbon.With all the hydrogen sulfide removed, the carbon will only be required to remove any remaining VOC's, thus greatly increasing the longevity and cost effectiveness of the carbon.


A MARCAB Dual Stage Scrubber relieves a neighborhood of Lift Station odors.
SYSTEM UPGRADES ALSO AVAILABLE FROM MARCAB:

NEMA 4X Control Panels Variable Frequency Drives
Differential Pressure Gauges Stainless Steel Fan Construction


This MARCAB Odor Control System incorporates nicely into a headworks facility in a Florida
Waste Water Treatment Plant.
Specify a Marcab Company, Inc. Odor Control System to eliminate hydrogen sulfide from your treatment processes.

155 Balboa Street Suite D-9 San Marcos, California 92069
TEL 760-510-8030 / FAX 760-510-8031

Site Designed by
Wriwebs.com