Nov CO-DIGESTION Oosterhof Holman Milieutechniek B.V. Kievitsweg 13 NL-9843 HA, Grijpskerk The Netherlands. Tel.:(+31)(0)594 – Fax: (+31)(0)594 –

Nov Oosterhof Holman 2007 Oosterhof Holman Beheer bv

Nov Oosterhof Holman in the Netherlands Grijpskerk Groningen Kootstertille Giekerk Harlingen Arnhem AMSTERDAM

Nov Principle Co-digester Biogas CHP Engine Manure Energy crops compost biogas

Nov 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

Nov Co-digestion in the Netherlands Operational: 60 installations (25 built by Oosterhof Holman) Max. Potential: 1000 installations, MW installed electrical power. Depends on electricity price, or possible gate fee for raw materials.

Nov 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

Nov Storage of raw materials

Nov Dry Matter Feeding System Screw Systems

Nov Dry Matter Feeding System Trioliet Walking Floor

Nov Digesters

Nov Second stage Digesters

Nov Combined Heat & Power Plants

Nov Heating System

Nov Typical Examples Donderen, the Netherlands

Nov Typical Examples Jelsum, the Netherlands

Nov Typical Examples Winsum, the Netherlands

Nov Typical Examples Haulerwijk, the Netherlands

Nov Optional Drying of the digestate –Compost (dry matter) –Fertilizer replacement (liquids) Green Gas production –Mixing into natural gas grid –As vehicle fuel