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Nov. 2007 1
CO-DIGESTION
Oosterhof Holman Milieutechniek B.V.
Kievitsweg 13NL-9843 HA, GrijpskerkThe Netherlands.
Tel.: (+31)(0)594 – 280 123Fax: (+31)(0)594 – 212 883E-mail:[email protected]
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Oosterhof Holman 2007
Oosterhof Holman Beheer bv
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Oosterhof Holman in the Netherlands
GrijpskerkGroningenKootstertilleGiekerkHarlingenArnhem AMSTERDAM
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Principle
Co-digester
Biogas CHP Engine
Manure
Energy cropscompost
biogas
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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
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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.
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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
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Storage of raw materials
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Dry Matter Feeding System
Screw Systems
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Dry Matter Feeding System
Trioliet
Walking Floor
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Digesters
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Second stage Digesters
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Combined Heat & Power Plants
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Heating System
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Typical Examples
Donderen, the Netherlands
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Typical Examples
Jelsum, the Netherlands
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Typical Examples
Winsum, the Netherlands
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Typical Examples
Haulerwijk, the Netherlands
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Optional• Drying of the digestate
– Compost (dry matter)– Fertilizer replacement (liquids)
• Green Gas production– Mixing into natural gas grid– As vehicle fuel
