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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 new patented anaerobic digestion technology that is 4 times more efficient and much more compact than conventional biogas plants thanks to vertical silo design. The anaerobic filter uses a recycled and 100% renewable packing material to replace costly and polluting plastic packing. This medium provides an ecological habitat for the bacteria and enhances their performance. The solution is adapted for the treatment of liquid effluents and the great advantage, unlike other technologies, is that it can also valorize pulpy effluents like biowaste pulp. The bioreactors have lower operational costs and increased energy production by keeping the micro-organisms on the packing material, which allows producing 10% more biogas. The system is modular, so bioreactors can be built from a small scale and easily be expanded as needed. The Solution aims for the optimization of the economic and environmental model of energy and agronomic recovery of biowaste.
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