| Canada | - Preliminary engineering for a large cofermentation biogas plant. Conception, process technology, energy calculations, cost assessment, layout, biogas plant description
- Preliminary planning of a biogas plant in Canada
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| Germany | - Preliminary engineering for a large cofermentation biogas plant in East Germany for a German general contractor. Conception, process technology, energy calculations, cost assessment, layout, biogas plant description
- Complete Engineering for a farm-scale biogas plant in central Germany for pure grass digestion. Conception, approval documentation, cost assessment, tender documents, supervision of construction, start-up
- Complete Engineering for a large farm-scale biogas plant in central Germany. Conception, approval documentation, cost assessment, tender documents, supervision of construction, start-up
- Preliminary engineering for a farm-scale biogas plant for pig manure and grass digestion. Conception, cost assessment
- Development of measurement techniques for four farm-scale biogas plants in West Germany. Remote control, detailed engineering, costs. See for this our references in Petrusheim, Schleupen and Dickhoven.
- Complete Engineering for a farm-scale biogas plant. Conception, approval documentation, cost assessment, tender documents, supervision of construction, start-up
- Preplanning for extension of an old biogas plant for cofermentation of biowaste from source separated organic household waste in Southwest Germany
- Study on the digestion of agricultural products for a biogas plant for three farms in West Germany. Conception, process technology, cost assessment
- Preliminary engineering for a farm-scale biogas plant for a public education farm for young farmers. Conception, process technology, cost assessment, layout, biogas plant description
- Study on the digestion of grass and starch for a farm-scale biogas plant in West Germany. Conception, process technology, cost assessment
- Complete Engineering for a large cofermentation biogas plant in East Germany. Conception, approval documentation, cost assessment, tender documents, supervision of construction, start-up
- Technical and financial investigation of a new desulphurisation system for a 10 years old large biogas plant in North West Germany
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| Great Britain | - 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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| Italy | - Complete Engineering for process technology for a biogas plant for 45 farmers in Italy . Planning and supervision of construction site together with Italian partner company, cost assessment and control, start-up
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| Japan | - Preliminary engineering for two large cofermentation biogas plants for a German general contractor. Conception, process technology, energy calculations, cost assessment, layout, biogas plant description
- Preplanning and conception for a large agricultural biogas plant located on Hokkaido, Japan for a German general contractor. Cost assessment, technical discussions in Japan, negotiations, detailed engineering
- Preliminary Engineering of a biogas plant for 3.000 pigs in Japan for a German general contractor, cost assessment, plant description
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| Spain | - 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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| The Netherlands | - Detailed engineering for a farm-scale biogas plant. Digester calculation, tube engineering, start-up
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