FerroSorp DGR is the iron hydroxide powder Interra Global supplies for dosing into anaerobic digesters, where it controls hydrogen sulfide at its source, inside the digester. It is the powder form of FerroSorp, alongside the SK and SLH pellets, and it ships in 40 lb bags or 2,200 lb super sacks. Interra Global reviews operating conditions and recommends a dosing approach when called on.
FerroSorp DGR is a powdered iron(III) oxide-hydroxide, FeO(OH), developed for the removal of hydrogen sulfide in anaerobic processes. It is the same iron raw material as the FerroSorp pellets, supplied as a fine powder with a high iron content. Dosed into the digester feedstock, it binds sulfur in the digestate before it leaves the digester as hydrogen sulfide (H₂S) in the biogas, which lowers the sulfide load on everything downstream. The sulfur, bound to iron, leaves the digester with the digestate instead of entering the gas. FerroSorp DGR is one of the two iron hydroxide powders in Interra Global's H₂S removal media line; it reacts quickly and is typically the powder specified where the digester's retention time is short. Typical Applications FerroSorp DGR goes into the liquid phase only, the digester or its digestate, and is typically dosed at anaerobic digesters producing biogas:
It can also be used for odor control in liquids. It is not used in the gas phase; gas-phase removal is the work of the FerroSorp SK and SLH pellets. Sizes and Packaging
FerroSorp DGR ships in 40 lb bags, 55 bags to a 2,200 lb pallet, or in 2,200 lb super sacks with a bottom drain valve. Other packaging is quoted on request. Frequently Asked Questions What is FerroSorp DGR? A powdered iron hydroxide for controlling hydrogen sulfide in anaerobic digesters, supplied by Interra Global. It is dosed into the digester feedstock, typically at biogas plants and wastewater treatment plants. How does FerroSorp DGR control hydrogen sulfide? The iron in the powder binds sulfur in the digester liquid, so less of it leaves as hydrogen sulfide in the biogas. The sulfur, bound to iron, leaves the digester with the digestate. How is the dosing rate set? Feedstock composition, digester type, and current sulfide levels typically set the dosing rate. Interra Global reviews a digester's operating conditions and recommends a dosing approach when called on. Does FerroSorp DGR replace a gas-phase media bed? FerroSorp DGR is dosed into the digester liquid and is not used in the gas phase. Dosing lowers the sulfide that reaches the gas; whether a bed of FerroSorp SK or SLH pellets is also needed downstream depends on the feedstock and the outlet specification the gas must meet, and Interra Global assesses that per site on request. What is the difference between FerroSorp DGR and iSORB IronMaxx? Both are iron hydroxide powders dosed into the digester as a slurry. FerroSorp DGR reacts more quickly and is typically specified where the digester's retention time is short. iSORB IronMaxx™ is the standard choice for most digesters. Is automated, dust-free dosing available? Interra Global supplies the ADS™ Powder Dosing System, which doses iron powder from super sacks as a slurry, dust-free and under integrated controls. Whether it suits a given digester is reviewed on request. Does the data sheet list heavy metal content? Yes. The FerroSorp DGR product data sheet gives a limit and a typical range for each heavy metal it lists, measured on the solid content, along with the powder's manganese content. How should FerroSorp DGR be stored? It is typically kept in a dry location, with opened packages resealed to prevent contamination and the oldest material used first. |
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