Nov. 2007 1 CO-DIGESTION Oosterhof Holman Milieutechniek B.V. Kievitsweg 13 NL-9843 HA, Grijpskerk...

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:info@oosterhof-holman.nl

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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