H2S Corrosion Control

Noxious odor and widespread corrosion are significant problems in wastewater systems, resulting in resident complaints and expensive capital infrastructure projects.

ECO2 SuperOxygenation technology may be your solution.

Odors and corrosion are often the result of hydrogen sulfide formation in pump stations, pipelines, pretreatment systems and headworks facilities. ECO2 technology eliminates the problem by preventing hydrogen sulfide formation. An ECO2 System can be added to current facilities and treatment systems in virtually any location or footprint.

ECO2 technology eliminates hydrogen sulfide odor and corrosion by dissolving enough pure oxygen in wastewater to maintain aerobic conditions, which prevent the formation of hydrogen sulfide. The ECO2 SuperOxygenation system saves money on alternative chemicals, eliminates the need for scrubbers and traditional treatment systems, provides pretreatment without increasing total dissolved solids, and eliminates the costly handling and disposal of hazardous by-products associated with scrubbers and chemical treatment.

Goals:

• Establish and sustain aerobic conditions
• Prevent odor caused by H2S and other organic compounds
• Prevent corrosion due to sulfuric acid

The headworks of a Waste Water Treatment Plant are a notorious point of odor release. Hydrogen sulfide formed under septic conditions is stripped from solution and released into the atmosphere due to turbulent conditions and often plague the local area with a rotten-egg odor. By preventing septic conditions to form in the headworks influent, these conditions can become a thing of the past.

The ECO2 SuperOxygenation system dissolves pure oxygen into raw wastewater to raise the D.O. level upstream of the headworks. In doing so, existing odorous compounds are aerobically consumed so that none are present to be released when the wastewater enters the headworks.

Goals:

• Establish and sustain aerobic conditions
• Prevent odor caused by H2S and other organic compounds
• Prevent corrosion due to sulfuric acid
• Eliminate requirement to cover WWTP headworks and chemically scrub off-gases

Primary clarifiers are often the major odor generation sources in any treatment facility. The main causes of problems occurring in primary clarifiers may be attributed to high BOD concentrations, long detention times, the lack of oxygen transfer across the quiescent surface, anaerobic conditions resulting in hydrogen sulfide accumulation, and efficient stripping of noxious volatiles in the discharge weirs.

Odor prevention in the primary clarifier depends upon a sufficient influent D.O. increase to a concentration in excess of that consumed in passage through the primary clarifier. Provision of 20 to 30 mg/L DO through pure oxygen supplementation will maintain aerobic conditions and preclude hydrogen sulfide generation in the bulk water while allowing bacterial oxidation of hydrogen sulfide flux from the sludge layer into the bulk water. Suspended solids will not be affected as the dissolved oxygen will remain in solution. No effervescence will occur as the amount of D.O. required is well below the saturation concentration of pure oxygen in water.

Adding ECO2 SuperOxygenation to the primaries will either protect existing covers from corrosion or eliminate the need for costly covers and the associated foul air scrubbers altogether.

In addition to odor control, a direct reduction in D.O. consumption will occur in the aeration tank in proportion to the DO consumed in the primary clarifier.

Goals:

• Establish and sustain aerobic conditions
• Prevent odor caused by hydrogen sulfide and other organic compounds
• Prevent corrosion due to sulfuric acid
• Eliminate requirement to cover WWTP headworks and chemically scrub off-gases
• Eliminates confined space maintenance issues
• No impact to settling