ESP
ESP Process - Sulfide Control for Sewerage Collection Systems
Treatment of sulfide within collection systems is a difficult challenge. The organisms responsible for the production of sulfide are ubiquitous. They will grow within a collection system at any point where oxygen is limiting. Anaerobic or anoxic zones within a collection system create the perfect environment for the production of sulfide. Sulfide producing organisms harvest all oxygen molecules from oxygen rich sulfur compounds (e.g. sulfate, sulfite) commonly available within the wastewater for use in their metabolic processes. The resulting sulfide production causes significant odor issues and tremendous damage to infrastructure primarily from corrosion. Corrosion occurs as sulfide is converted to sulfuric acid by another class of organisms that use sulfide as an energy source.
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Nitrate-based chemistry, as a basis of H2S control, can be very expensive, particularly in those situations where sulfide has already formed within the wastewater prior to nitrate addition. Under these circumstances, significant quantities of nitrate are necessary to induce organisms to consume sulfide. Nitrate seems better suited for sulfide control as a deterrent to formation, not for sulfide control after it has already formed. Studies conducted using nitrate in those situations where sulfide was a pre-existing condition prior to the addition of nitrate indicate that costly amounts of the chemical are necessary to control sulfide.
Source Technologies’ latest addition to its line of advanced oxidation products designed to cost-effectively treat H2S in long force mains is the ESP PROCESS. The ESP Process combines the ESP catalyst with oxygen (O2) in solution creating a superoxide ion.
Unlike the nitrate-based chemistry referenced above that only helps to prevent H2S formation while doing little to treat existing H2S, the advantages of ESP are that it treats both the H2S at the dosing point as well as downstream for up to 60 hours. The oxygen is produced onsite using a molecular sieve and compressor which eliminates the need for large bulk tanks and refilling.
Control of sulfides within variable length and multiple line collection systems can be complex as no two systems are identical. For this reason, Source can provide ESP Process blends that are specific to the customer’s needs. This allows for the most efficient and cost-effective treatment for long detention times on the market today.
With proper set-up, the ESP Process is environmentally friendly and will solve sulfide control issues effectively and economically. This is truly a break-through technology that can provide the control for sulfide that has been sorely needed within wastewater treatment.
