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Oosterhof Holman specializes in co-digestion technology that maximizes biogas production from agricultural waste. In the Netherlands, the process integrates pig manure and energy crops like corn to optimize biogas yield. Key metrics show that 1 m³ of pig manure can produce about 30 m³ of biogas. With established installations and a potential for growth, Oosterhof Holman leads in sustainable energy solutions, facilitating the transition to greener energy through innovative CHP systems, digesters, and effective waste management.
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CO-DIGESTION Oosterhof Holman Milieutechniek B.V. Kievitsweg 13 NL-9843 HA, Grijpskerk The Netherlands. Tel.: (+31)(0)594 – 280 123 Fax: (+31)(0)594 – 212 883 E-mail: info@oosterhof-holman.nl
Oosterhof Holman Beheer bv Oosterhof Holman 2007
Oosterhof Holman in the Netherlands GrijpskerkGroningenKootstertilleGiekerkHarlingenArnhem AMSTERDAM
Biogas CHP Engine Principle biogas Manure Energy crops compost Co-digester
Rules of Thumb • 1 m³ pig manure (PM) produces about 30 m³ of biogas • 1 ton of corn produces about 180 m³ of biogas • Mixture: about 2 to 1 (2 ton PM/1 ton Corn), total dry matter content must be smaller than 20%. • 1 m³ biogas generates about 1.8 kW of electricity. • Typical investment (Netherlands) : • 190 kWe installation: € 0,6 million • 1000 kWe installation: € 2.5 million
Co-digestion in the Netherlands • Operational: 60 installations (25 built by Oosterhof Holman) • Max. Potential: 1000 installations, 300-500 MW installed electrical power. • Depends on electricity price, or possible gate fee for raw materials.
The Installation • Storage of raw materials • Dry Matter Feeding System • 1 or more digesters • 1 or more second stage digesters • 1 or more CHP Plants • Transformerstation • Heating system • Process Control Sytem
Dry Matter Feeding System Screw Systems
Dry Matter Feeding System Trioliet Walking Floor
Typical Examples Donderen, the Netherlands
Typical Examples Jelsum, the Netherlands
Typical Examples Winsum, the Netherlands
Typical Examples Haulerwijk, the Netherlands
Optional • Drying of the digestate • Compost (dry matter) • Fertilizer replacement (liquids) • Green Gas production • Mixing into natural gas grid • As vehicle fuel