Microsoft Word - Environmental benefits of recycling 2010 update.doc

Food & garden  ‐ n°2
Title Environmentalin Århus Kommune^ assessment^ of^ garden^ waste^ management^
Year 2009
Author Boldrin

Case

Material composition

Sub‐scenario Windrow compostingincinerationComposting of andrejects^

Composting and

seasonal incineration

of waste

Max incineration of

waste Home^ composting

Home composting

and max incineration

Virgin material

Material marginal: which? peat,fertiliser^ inorganic^ peat,fertiliser^ inorganic^ peat,fertiliser^ inorganic^ peat,fertiliser^ inorganic^ peat,fertiliser^ inorganic^ peat,fertiliser^ inorganic^

Electricity marginal: which? coal coal coal coal coal coal

Heat marginal: which? coal coal coal coal coal coal

Co‐products dealt with? Yes Yes Yes Yes Yes Yes

Recovered material

Material marginal: which? mature compost mature compost mature compost mature compost mature compost mature compost

Electricity marginal: which? coal coal coal coal coal coal

Heat marginal: which? coal coal coal coal coal coal

Co‐products dealt with? //////

Material recovery included? Yes Yes Yes Yes Yes Yes

Type of recycling open loop open loop open loop open loop open loop open loop

In which ratio does recycled material substitute virgin

material?

1000:131.5

compost:peat/fertilise

r

1000:131.5

compost:peat/fertilise

r

1000:131.5

compost:peat/fertilise

r

1000:131.5

compost:peat/fertilise

r

1000:131.5

compost:peat/fertilise

r

1000:131.5

compost:peat/fertilise

r

General

Technology current current current current current current

Infrastructures taken into account? No No No No No No

Transport included? Yes Yes Yes Yes Yes Yes

Energy production

Produced energy substitutes electricity? Yes Yes Yes Yes Yes Yes

Produced energy substitutes heat? Yes Yes Yes Yes Yes Yes

Avoided processes ‐ credits inorenergy,ganic^ peat fertiliser^ and^ inorenergy,ganic^ peat fertiliser^ and^ inorenergy,ganic^ peat fertiliser^ and^ inorenergy,ganic^ peat fertiliser^ and^ inorenergy,ganic^ peat fertiliser^ and^ inorenergy,ganic^ peat fertiliser^ and^

Material substitutes peat^ andfertiliser^ inorganic^ peat^ andfertiliser^ inorganic^ peat^ andfertiliser^ inorganic^ peat^ fertiliserand^ inorganic^ peat^ andfertiliser^ inorganic^ peat^ andfertiliser^ inorganic^

Carbon sequestration issue taken into account? Yes Yes Yes Yes Yes Yes

Waste characteristics

Heating value //////

Degradation rate (over  100  years) accordingsubfraction^ to^ accordingsubfraction^ to^ accordingsubfraction^ to^ accordingsubfraction^ to^ accordingsubfraction^ to^ accordingsubfraction^ to^

Incineration

Alternative use of incineration capacity included? No No No No No No

Composting

Compost spreading for composting taken into account?//////

Compost leaching after spreading taken into account?//////

Carbon binding of compost included? Yes Yes Yes Yes Yes Yes

% of carbon remaining in compost after  100  uears 15% 15% 15% 15% 15% 15%

Landfill

Methane emissions included? //////

2[GW] (GW=Garden Waste)

Fine stuff, branches, wood, hard materials and foreign items

Material

production

Material

recovery

Material

disposal