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64 Evaluation of Opportunities for Converting Indigenous UK Wastes to Wastes and Energy AEA/ED45551/Issue 1 Table 30 Aboricultural arisings for Great Britain. Total Arboricultural Non-marketed Aboricultural Regions Arisings (odt pa) Arisings (odt pa) East Midlands 63,451 50,636 East of England 46,656 37,357 North East 15,525 11,133 North West 39,445 25,979 South East 157,344 119,160 South West 34,830 27,012 West Midlands 15,445 7,115 Yorkshire and Humber 72,329 23,814 Scotland 16,146 12,448 Wales 11,000 6,841 Great Britain - Total 472,171 321,495 Due to the voluntary nature of providing this data the above figures should be taken as an estimate. Figure 12 illustrates the relative proportion of material produced from these activities. 53% 4% 20% 23% Foliage Wood chips Branch w ood Stem w ood Figure 12 Arboricultural arisings by the material produced (odt/annum) Potential Forestry resource, without serious disruption to existing wood using industries It is estimated that if all existing forests were actively managed for timber production and material not suited for use by existing markets (e.g construction and board manufacturers) was recovered, 1.9 million odt of wood from coniferous forest and 2.3 million odt of wood from broadleaved forest could be harvested each year, giving a total current forestry biomass resource of 4.2M odt. 93
Evaluation of Opportunities for Converting Indigenous UK Wastes to Wastes and Energy AEA/ED45551/Issue 1 It should be noted though that this figure ignores environmental constraints such as long-term site sustainability, and physical and economic constraints such as cost of harvesting and extracting this material from the forest. Making several assumptions on market availability allows the availability of arboricultural arisings to be calculated, without serious disruption of existing wood using industries. 100 Assumptions on available arisings: • 10% of the small round-wood • 100% of poor quality stem-wood, stem tips and branches • 10% of sawmill product • On average, 70% of arboricultural arisings • 100% of material from clearance of utilities and roadside maintenance The total potential operationally available forestry residue quantity in Great Britain, in the absence of competing markets, is 3.12 million odt per annum. The main material is small round-wood, followed by sawmill co-product (potential to contribute around 1.03 and 0.86 million odt per annum respectively), with arboricultural arisings providing about 14% of the total. Approximately equal quantities are available in England and Scotland but the composition is substantially different. Arboricultural arisings form the major element in England though sawmill co-product, small round-wood, and branches are all significant components. In Scotland and Wales, small round-wood and sawmill co-products are the dominant resources with all other resource streams playing only a minor part at the moment. It may be argued that small round-wood is in fact a product and not a residue, however it has been considered that 10% of small round-wood may be available for use without serious disruption to existing wood using industries, hence it is included within the arisings data. 100 Table 31 Current potential operationally available forestry residue resources by region, taking into account competing markets Total Forests and Woodlands (odt pa) Arboricultural arising (odt pa) Region Sawmill Coproduct (odt pa) East Midlands 39,940 7,664 50,636 98 East of England 45,123 24,577 37,357 107 North East 21,689 50,615 11,133 83 North West 53,678 37,899 25,979 118 South East 50,888 22,191 119,160 192 South West 77,911 27,204 27,012 132 West Midlands Yorkshire and 23,102 100,460 7,115 131 Humberside 35,654 18,969 23,814 78 England - Total 347,985 289,579 301,933 939 Scotland 302,392 403,538 12,448 718 Wales 157,707 165,783 6,841 330 Great Britain - Total 1,987 Total (‘000 odt pa) Future Arisings Information presented here is an approximation of all British forests and woodlands. There is great uncertainty about the future climate and the response of forests to that climate. 106 This applies to both direct effects (e.g. in the absence of nutrient and water limitations, growth is expected to increase due to 106 Forestry Commission, 2002, National Inventory of Woodland and Trees http://www.forestresearch.gov.uk/pdf/niengland.pdf/$FILE/niengland.pdf 65
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South East 327 - - 55% of MSW by 20
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Appendix 3 MBT Methods Specific in
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Figure 27 Orchid Environmental proc
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