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Sign upSeptember 9, 2024
Seppi Gaz
Issenheim
In 2023, SEPPI GAZ SAS launched an anaerobic digestion facility in Issenheim (68 500) to valorize livestock effluents and agricultural by-products, including those from SOJINAL. The increase in volumes requires an innovative and high-performance solution without impacting the agricultural digester. SEPPI GAZ turned to BioRenGaz for a tailored anaerobic digestion unit, structured as follows: 1. Studies: design and engineering. 2. Implementation: manufacturing, installation, commissioning. The innovative bioreactor processes agri-food effluents, including: - Alpro whitewater - Unpacked plant-based milks The installation includes pre-storage (5 m³), a bioreactor (80 m³), a management tank (5 m³), and a technical container. This project optimizes agricultural anaerobic digestion and renewable energy production.
From an environmental perspective, the production of 940 MWh-PCS/year of biomethane saves 171 tCO₂eq/year by replacing fossil gas. Our technology also produces digestate, an alternative to chemical fertilizers (60% of the carbon footprint), the impact of which still needs to be assessed based on its nutrient content (N, P, K). Economically, the investment of €399,012 shows an IRR of 15.2%, a payback period of 5.8 years, and operating expenses of €6,025 per month.
BioRenGaz has developed a patented anaerobic digestion technology that delivers performance four times higher than conventional systems. Thanks to its vertical design, our solution optimizes the footprint of digesters, reducing the required surface area by up to tenfold. It also lowers operational costs by 75% (upflow system, no agitation) while producing 10% more biogas. BioRenGaz has patented the use of wood, sourced from green waste composting platforms, as a growth support to replace expensive plastic carriers. This material provides an eco-friendly habitat for bacteria and enhances their performance. The technology valorizes liquid substrates such as food waste slurries, wastewater treatment plant (WWTP) sludge, liquid waste from the agri-food industry, whitewater, and livestock manure.
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