| 2022 | - Technical feasibility study for several waste-to-energy plants on the Canary Islands/ Spain
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| 2020 | - Technical evaluation and dimensioning of a biogas plant in Spain
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| 2012 | - Isolation of the first digester of a biogas plant in Spain
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| 2011 | - Engineering of a biogas plant for the digestion of waste in Spain. Conception, Final design and Start-up
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| 2010 | - Technical and agricultural advice for preliminary design of a large-scale biogasproject with energy Spain
- Extension of an existing coferemtation biogas plant in Spanien
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| 2009 | - Operator service (kf-operator)for a co-fermentation-plant in Spain
- Complete engineering of a biogas plant in Spain: design, permission, cost assessment, call for tender, supervision and start-up
- Complete engineering of a biogas plant for the digestion of waste in Spain: design, permission, cost assessment, call for tender, supervision and start-up
- Complete engineering of a biogas plant in Spain: design, permission, cost assessment, call for tender, supervision and start-up
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| 2008 | - Complete design of a waste fermentation biogas plant in Spain: conception, permission, cost assessment, call for tender, supervision and start-up
- Complete design of a biogas plant for the digestion of waste in Spain: Design, permission, cost assessment call for tender, supervision and start-up
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| 2007 | - Extension of a cofermentation plant in Spain, which was built by Krieg & Fischer Ingenieure GmbH.
- Preliminary engineering of a cofermentation plant in Spain. Detailed planning, technical preparation, supervision of construction, start-up.
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| 2006 | - Complete engineering of a biogas plant for the digestion of kitchen waste in Spain. Conception, approval documentation, cost assessment, tender documents, supervision of construction, start-up
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| 2004 | - Preparation of a study about monodigestion of residues of the olive oil industry in a biogas plant in Spain.
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| 2001 | - Participation in a biogas project financed by the European Union together with Spanish and Austrian companies. Conception of biogas technology for medium sized and large biogas plants in Spain.
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| 2000 | - Preliminary engineering for a large cofermentation biogas plant for a German general contractor. Conception, process technology, energy calculations, budget cost assessment, layout, biogas plant description
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| 1999 | - Calculation, conception, pre-engineering, cost assessment, preparation of quotation for a large-scale biogas plant (pig manure) in Spain for a German plant construction company
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