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International Review of Waste Management Policy - Department of ...

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land. 1270 The use <strong>of</strong> compost in horticulture is also assumed to result in a reduction in<br />

the use <strong>of</strong> pesticides.<br />

Monetised benefits associated with the use <strong>of</strong> compost are presented in Table 63-26.<br />

Table 63-26: Monetised Benefits Associated with the Use <strong>of</strong> Compost<br />

Agriculture<br />

Horticulture<br />

1024<br />

29/09/09<br />

In In vessel vessel Windrow<br />

Windrow<br />

Pesticide reduction - € 3.23 - € 3.93<br />

Nutrient displacement - € 2.84 - € 2.62<br />

Avoided phosphate rock extraction - € 0.76 - € 0.56<br />

Avoided process wastewater disposal - € 0.26 - € 0.19<br />

Avoided water use - € 1.07 - € 1.07<br />

Avoided N-leaching - € 2.31 - € 2.29<br />

Avoided N2O emissions - € 0.18 - € 0.18<br />

Avoided peat extraction - € 0.32 - € 0.32<br />

Pesticide reduction - € 1.74 - € 2.11<br />

Notes<br />

Compost produced from the in vessel process is assumed to result from a mixture <strong>of</strong> 70%<br />

garden waste and 30% food waste.<br />

The results shown in Table 63-26 show damage costs relating to compost produced<br />

in an in vessel system with a feedstock <strong>of</strong> 30% food waste, against compost resulting<br />

from a windrow system that is assumed to treat only garden waste. The differences in<br />

the damage costs result from the different feedstocks assumed to be treated by each<br />

type <strong>of</strong> system. A larger volume <strong>of</strong> compost is produced from a feedstock comprised<br />

<strong>of</strong> 100% garden waste, as garden waste contains less moisture, and more <strong>of</strong> the<br />

lignin-based materials which are resistant to degradation. Against this, compost<br />

produced from a feedstock containing food waste has a higher nutrient content, and<br />

can therefore displace greater quantities <strong>of</strong> nutrient that are assumed to have been<br />

otherwise supplied by the use <strong>of</strong> synthetic fertilisers.<br />

63.8.5 Summary – Damage Costs Associated with Composting Processes<br />

Table 63-27 summarises the damage costs associated with treating source<br />

separated organic wastes in composting systems.<br />

1270 This follows the methodology described in AEA Technology (2001) <strong>Waste</strong> <strong>Management</strong> Options and Climate<br />

Change: Final Report, European Commission: DG Environment, July 2001

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