Iron hydroxide is a viscous, pasty reactant based on iron hydroxide for binding sulfur compounds in the biogas plant. Iron(III) hydroxide oxide prevents the formation of harmful H2S. H2S is corrosive and can attack metal parts of the plant as well as concrete components of the plant. In addition, the use of iron hydroxides increases the availability of essential trace elements and thus the stability and efficiency of microbiological processes.

Product description
• Appearance: firm red-brown mass
• Chemical name: iron (III) hydroxide oxide FeO(OH)
• Iron content (Fe3+): approx. 12-20%, typically 16% in dry matter
• Dry matter: approx. 20-40%, typically 35%

Product advantages
• Highly reactive due to the amorphous structure of the iron hydroxide
• Fast binding of sulfur compounds
• Not hazardous to water, not a hazardous substance and not corrosive

Packaging and storage
• bulk

Dosage
The dosage amount depends on the system volume and the feeding rate.

Example
For a 2,5MW electric power biogas plant or 10 tpd biomethane per day the usage is 300 kg/day on the constant basis. The plant works with grass silage. With the usage of the iron hydroxide in the biogas reactor the sulphur level in biogas drops from 1500-2000 ppm to 60-80 ppm.