Energy from Waste: Difference between revisions

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Aside from the desired electricity, heat, or chemicals (including fuels) generated from the Energy from Waste process; a range of by-products are also produced.

The residual Bottom Ash or [[IBA]] left after the combustion process is generally around 20% of the input tonnage by weight but will vary in quantity and chemical composition depending on the composition of the waste feedstock (i.e. bottom ash from Waste Wood EFW will be different to Residual Waste EFW in composition and in percentage terms) . This often contains minerals and metals along with non-combustible ash, which is increasingly being recycled into [[Secondary Aggregates]], with some currently being accepted by The Highways Agency in a processed form <ref name='ref3'>WRAP, 2019. [http://www.wrap.org.uk/sites/files/wrap/6_O_And_EFW_Guidance_Outputs.pdf EfW Outputs and Residues Guidance on the management of energy outputs and residues including air pollution control residues and incinerator bottom ash. EfW Development Guidance.] [online] [Accessed 30 Oct. 2019].</ref> ~~known as [[IBBA]]~~.

The residual Bottom Ash or [[IBA]] left after the combustion process is generally around 20% of the input tonnage by weight but will vary in quantity and chemical composition depending on the composition of the waste feedstock (i.e. bottom ash from Waste Wood EFW will be different to Residual Waste EFW in composition and in percentage terms) . This often contains minerals and metals along with non-combustible ash, which is increasingly being recycled into [[Secondary Aggregates]], with some currently being accepted by The Highways Agency in a processed form known as [[IBBA]]<ref name='ref3'>WRAP, 2019. [http://www.wrap.org.uk/sites/files/wrap/6_O_And_EFW_Guidance_Outputs.pdf EfW Outputs and Residues Guidance on the management of energy outputs and residues including air pollution control residues and incinerator bottom ash. EfW Development Guidance.] [online] [Accessed 30 Oct. 2019].</ref>.

The combustion gases from EFW are cleaned in several stages to a strict standard set by the [[Waste Incineration Directive]] ([[WID]]), which are monitored by the Environment Agency (EA) in England. This gas cleaning results in a residual [[Flue Ash]] which is around 3% of the overall input to the plant by weight depending on the level of gas cleaning required.

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 Aside from the desired electricity, heat, or chemicals (including fuels) generated from the Energy from Waste process; a range of by-products are also produced.
-The residual Bottom Ash or [[IBA]] left after the combustion process is generally around 20% of the input tonnage by weight but will vary in quantity and chemical composition depending on the composition of the waste feedstock (i.e. bottom ash from Waste Wood EFW will be different to Residual Waste EFW in composition and in percentage terms) . This often contains minerals and metals along with non-combustible ash, which is increasingly being recycled into [[Secondary Aggregates]], with some currently being accepted by The Highways Agency in a processed form <ref name='ref3'>WRAP, 2019. [http://www.wrap.org.uk/sites/files/wrap/6_O_And_EFW_Guidance_Outputs.pdf EfW Outputs and Residues Guidance on the management of energy outputs and residues including air pollution control residues and incinerator bottom ash. EfW Development Guidance.] [online] [Accessed 30 Oct. 2019].</ref> known as [[IBBA]].
+The residual Bottom Ash or [[IBA]] left after the combustion process is generally around 20% of the input tonnage by weight but will vary in quantity and chemical composition depending on the composition of the waste feedstock (i.e. bottom ash from Waste Wood EFW will be different to Residual Waste EFW in composition and in percentage terms) . This often contains minerals and metals along with non-combustible ash, which is increasingly being recycled into [[Secondary Aggregates]], with some currently being accepted by The Highways Agency in a processed form known as [[IBBA]]<ref name='ref3'>WRAP, 2019. [http://www.wrap.org.uk/sites/files/wrap/6_O_And_EFW_Guidance_Outputs.pdf EfW Outputs and Residues Guidance on the management of energy outputs and residues including air pollution control residues and incinerator bottom ash. EfW Development Guidance.] [online] [Accessed 30 Oct. 2019].</ref>.
 The combustion gases from EFW are cleaned in several stages to a strict standard set by the [[Waste Incineration Directive]] ([[WID]]), which are monitored by the Environment Agency (EA) in England. This gas cleaning results in a residual [[Flue Ash]] which is around 3% of the overall input to the plant by weight depending on the level of gas cleaning required.