Biogas Plant Feedstock

A biogas digester is a facility that converts organic waste into renewable energy through anaerobic digestion. In this biological process, microorganisms break down organic material in the absence of oxygen. This method produces biogas, which primarily consists of methane (CH4) and carbon dioxide (CO2), along with a nutrient-rich byproduct known as digested residue (digestate).

CITIGATE S.L. is your trusted partner for supplying feedstock that is rich in methane, has low sulfur content, and is ideal for optimal use in your digester. We have been ISCC-certified since 2013, demonstrating our strong position in the bioenergy industry.

• Reduces Landfill Usage: Diversifies organic waste streams away from landfills, reducing long-term environmental hazards.
• Reduces Greenhouse Gas Emissions: Captures methane that would otherwise escape into the atmosphere.
• Produces Nutrient-Rich Digestate: Generates high-quality bio-fertilizers to replace chemical fertilizers in agriculture.

We supply a wide range of organic waste substrates (solids, slurries, and liquids) derived from agricultural, industrial, or municipal sectors:

• Agricultural waste (including out-of-specs grains, rice husk)
• Beet Molasses
• Crude Glycerin (C1, C2, and C3)
• CAT3 fats & proteins
• Liquid and solid manure
• Sludge from wastewater treatment plants
• Municipal waste (Biowaste, food leftovers)
• Energy crops & fermentation substrates

We are committed to environmental sustainability by effectively utilizing residues and byproducts as raw materials for energy generation. This practice supports our business's circular economy. Fermentation turns organic waste—such as food scraps, agricultural residues, and wastewater—into renewable energy through microbial decomposition. Key methods include anaerobic digestion to produce methane-rich biogas for electricity and heat, and fermentation to produce biofuels such as ethanol and hydrogen. This circular approach reduces landfill waste and greenhouse gases.

CITIGATE is committed to developing a culture where health, safety, environmental protection, and regulatory compliance are adopted and practiced throughout all levels of our organization.

Contact us today to outline a roadmap for cooperation