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1.3 Waste Wood Arisings<br />
182<br />
Evaluation of Opportunities for Converting Indigenous UK Wastes <strong>to</strong> Wastes and Energy<br />
AEA/ED45551/Issue 1<br />
Table 98 Summary of <strong>the</strong> main <strong>report</strong>s that investigate arisings of waste wood from Construction and Demolition Activities.<br />
Source Data Quality Findings<br />
TRADA: wood residues – waste or<br />
resource? 1999 304<br />
Recycling of construction materials<br />
(IDE and NFDC), IDE, 1990 305<br />
Nottingham Trent University<br />
Study 306<br />
Environment Agency for England<br />
and Wales, Survey on wood waste<br />
from <strong>the</strong> Construction and<br />
Demolition sec<strong>to</strong>r 307<br />
Enviros’ Study of Nor<strong>the</strong>rn Ireland’s<br />
Construction and Demolition waste,<br />
2001 308<br />
• Construction waste data originates from BRE’s SmartWaste method:<br />
visual inspection of skip contents.<br />
• Data quality was judged as ‘very poor quality’, and containing<br />
considerable uncertainties. Therefore this data has not been used in<br />
subsequent discussions.<br />
• Demolition waste estimates rely on <strong>the</strong> compositional data ga<strong>the</strong>red<br />
through a desk data ga<strong>the</strong>ring exercise <strong>by</strong> <strong>the</strong> Institution of Demolition<br />
Engineers (IDE) in 1989. Total demolition waste also established from<br />
this survey.<br />
• Data quality was judged as ‘very poor quality’, and containing<br />
considerable uncertainties. Therefore this data has not been used in<br />
subsequent discussions.<br />
• The study measured <strong>the</strong> wood content of C&D waste stream <strong>to</strong>ge<strong>the</strong>r<br />
with waste from industries supplying construction products. Therefore it<br />
is not possible <strong>to</strong> know <strong>the</strong> composition of waste arising wholly from<br />
construction and demolition.<br />
• Composition established <strong>by</strong> manually sorting and weighing small skip<br />
contents in Nottingham in three successive years.<br />
• The quantities of waste sorted as part of this work were low, and <strong>the</strong><br />
data quality was assessed as having considerable uncertainties.<br />
• Considered C&D arisings for Wales in 2005-6.<br />
• Obtaining data was not straight forward as many companies did not<br />
keep records, or take an interest in responding <strong>to</strong> <strong>the</strong> survey.<br />
• Data is from a survey at <strong>the</strong> point of disposal of C&D wastes, and a<br />
survey based on point of arising.<br />
• Enviros indicated that this figure is probably an underestimate of <strong>the</strong><br />
true figure, since some wood would have been categorised as “o<strong>the</strong>r<br />
C&D wastes including mixed wastes.”<br />
• It should be noted that <strong>the</strong>re are a number of assumptions in <strong>the</strong><br />
estimates which could affect <strong>the</strong> quality of <strong>the</strong> estimation, but <strong>the</strong> data<br />
was assessed as being of reasonable quality.<br />
Woodwaste arisings in Scotland – • Taking <strong>the</strong> annual C&D <strong>to</strong>nnage of 6.28 million <strong>to</strong>nnes and assuming<br />
2% is waste wood.<br />
• Construction wood waste estimates were 25.77% and 19.3%.<br />
• Using <strong>the</strong> lower estimate of 19.3%, as a fraction of 10 million <strong>to</strong>nnes<br />
<strong>to</strong>tal UK construction waste arisings.<br />
⇒ Construction: 1,930,000 <strong>to</strong>nnes<br />
• Identified that 7% of demolition waste arisings were wood.<br />
• Multiplying this percentage <strong>by</strong> <strong>the</strong> <strong>to</strong>tal demolition waste of 25 million<br />
<strong>to</strong>nnes yields an arisings figure of:<br />
⇒ Demolition: 1,875,000 <strong>to</strong>nnes<br />
• An estimated average wood composition of 12.44% was identified.<br />
• As this value includes waste from <strong>the</strong> construction products industry, it<br />
is likely <strong>to</strong> be a high estimate.<br />
• Of <strong>the</strong> 12.2 million <strong>to</strong>nnes produced in this period, 3% of C&D waste<br />
was wood.<br />
⇒ 366,000 <strong>to</strong>nnes.<br />
• Identified waste wood <strong>to</strong> be 1.5% of construction and demolition waste,<br />
as a minimum figure.<br />
• Waste Watch - % of C&D waste that is wood is 2%<br />
⇒ 125,600 <strong>to</strong>nnes<br />
304<br />
This reflects TRADA’s comments on collection of wood waste information, Riddoch S TRADA: wood residues – waste or resource? 1999.<br />
305<br />
Recycling of construction materials – Joint survey <strong>by</strong> Institute of Demolition Engineers and National Federation of Demolition Contrac<strong>to</strong>rs (IDE and NFDC), IDE, 1990.<br />
306<br />
A comparative study of <strong>the</strong> quantities of construction waste arising in large and small skips in <strong>the</strong> Greater Nottingham area, Nottingham Trent University and APT for ShanksFirst Wastes Solutions and Nottingham City Council,<br />
2001.<br />
307<br />
A survey on <strong>the</strong> arising and management of construction and demolition waste in Wales 2005-06, Environment Agency, 2006, http://www.environment-agency.gov.uk/research/library/publications/33979.aspx<br />
308<br />
Construction and Demolition Waste Survey, Enviros Consulting Ltd for <strong>the</strong> Nor<strong>the</strong>rn Ireland Environment and Heritage Service (NIEHS), http://www.ni-<br />
environment.gov.uk/construction_and_demolition_waste_survey_nor<strong>the</strong>rn_ireland_2001.pdf.