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The objectives of the project, which was carried out in South Shropshire were:
- To achieve a minimum biogas yield of 11,000m³ per hectare per year, which when converted to electricity on a commercial scale would generate 2.5 kWe / ha.
- To establish the relationship between the biogas yield and the harvesting cycle.
- To confirm that through storage of the grass it is possible to achieve a constant yield of biogas throughout the year.
- To assess the mass balance and energy balance for the whole process.
The project, whose outside consultant was the Institute of Grassland and Environmental Research (IGER), was divided into two elements:
- The harvesting of grass from about 1 hectare which was digested in a 18 m³ biogas plant.
- 32 experimental grass plots, which were monitored and analysed in detail, and digested in a pilot plant.
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DTI
Ryegrass