128 in the order of 14,000 tons. These figures were then considered in relation to the climate objectives of the relevant local authorities, Wageningen, Ede, Rhenen and Veenendaal. Assuming that each wishes to reduce the CO2 emissions produced by domestic energy usage by 20%, we find that the maximum use scenario would contribute between 10% and 50% of the target reduction. See the figure below. Impact of Binnenveld biomass projects on local authorities’ climate objectives. 5.000 10.000 15.000 20.000 25.000 30.000 35.000 40.000 - Wageningen Ede municipality 20% saving CO2 input Binnenveld Rhenen Veenendaal • Verges, banks and nature areas should continue to be mown and the cut grass removed. Where regular mowing has been discontin• Local use of grass clippings should be promoted. Options include use in composters or in animal sheds as the basis of a manure ued it should be reintroduced. mulch. • The transport and processing of grass clippings should be better coordinated. The combination of transport and processing will Further recommendations concern the use of grass clippings in the production of energy. In the basic scenario, the ambition is to use 1,500 tons of grass clippings per annum for energy production; in each of the other scenarios the target volume is 3,000 tons. To achieve this level, the authors recommend: • Local initiatives for a co-fermentation plant should be encouraged. This installation would convert clean grass clippings from the serve to reduce costs. A coordinator or ‘grass steward’ could be appointed to for this purpose. He will be aware of the current supply of grass clippings at any given moment, whereupon he will be able to advise the relevant parties of the most efficient transport and processing route. • Regional initiatives (at the level of the Food Valley) for large-scale processing of grass clippings should also be encouraged. Binnenveld region into sustainable energy. The last two recommendations have low priority in view of their minor impact in terms of landscape improvement or the attainment of climate objectives. Any increase in the total area of grassland in the Binnenveld region is considered inappropriate at this time. Recommendations for grass In the case of grass clippings, the authors’ recommendations are primarily concerned with increasing the available volume while reducing the transport and processing costs. Mowing grass on a regular basis enhances biodiversity and hence the quality of the landscape. Our recommendations are therefore: ton CO2/year Pagina 138
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