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==Summary==
==Summary==
[[Clinical Waste Incinerator]] operated by [[SRCL]] and located adjacent to Knostrop Treatment Works, Leeds, with an annual throughput limit of 17,000 tonnes.
[[Clinical Waste Incinerator]] operated by [[SRCL]] and located adjacent to Knostrop Treatment Works, Leeds, of a twin-line [[Grate|stepped hearth design]], with an annual throughput limit of 17,000 tonnes.
 
==Plant<ref name="Adden">Annual Performance Report 2020</ref>==
==Plant<ref name="Adden">Annual Performance Report 2020</ref>==
The Leeds incinerator consists of two streams, known as the East and West streams, each with a nominal throughput of one tonne of clinical waste per hour. The [[Environmental Permit|permit]] sets an annual throughput limit of 8500 tonnes on each stream, with lower limits on specific [[Waste|waste]] types. The two streams are independent of each other, so that one stream can still be operated while the other stream is shut down for maintenance.
The Leeds incinerator consists of two streams, known as the East and West streams, each with a nominal throughput of one tonne of [[Clinical Waste|clinical waste]] per hour. The [[Environmental Permit|permit]] sets an annual throughput limit of 8,500 tonnes on each stream, with lower limits on specific [[Waste|waste]] types. The two streams are independent of each other, so that one stream can still be operated while the other stream is shut down for maintenance.


The two incinerators are of stepped hearth design, with three main combustion hearths and an ash box. [[Clinical Waste]] is loaded mechanically direct from the wheeled bins used to deliver the [[Clinical Waste|waste]], onto the first hearth, and the [[Combustion|combustion]] process commences. Hydraulic rams operate at intervals to push the [[Clinical Waste|waste]] along the first hearth, until it falls off the end onto the second hearth where the [[Clinical Waste|waste]] burns vigorously at a temperature of between 1000 and 1100 degrees Centigrade. The [[Clinical Waste|waste]] is then pushed from the second hearth onto the third hearth, where it burns out to produce an ash. This bottom ash is then pushed into an ash box, where the fixed carbon in the ash is further burned out. The retention time on the hearths is approximately 12 hours, with the bottom ash being retained in the ash box for up to 8 hours before being dropped into a skip. Ram movements are programmed in relation to the number of bins fed.
The two [[Incineration|incinerators]] are of [[Grate|stepped hearth design]], with three main [[combustion]] [[Grate|hearths]] and an ash box. [[Clinical Waste]] is loaded mechanically direct from the wheeled bins used to deliver the [[Clinical Waste|waste]], onto the first [[Grate|hearth]], and the [[Combustion|combustion]] process commences. Hydraulic rams operate at intervals to push the [[Clinical Waste|waste]] along the first [[Grate|hearth]], until it falls off the end onto the second [[Grate|hearth]] where the [[Clinical Waste|waste]] burns vigorously at a temperature of between 1000 and 1100 degrees Centigrade. The [[Clinical Waste|waste]] is then pushed from the second [[Grate|hearth]] onto the third [[Grate|hearth]], where it burns out to produce an [[Incinerator Bottom Ash|ash]]. This [[Incinerator Bottom Ash|bottom ash]] is then pushed into an ash box, where the fixed carbon in the ash is further burned out. The retention time on the hearths is approximately 12 hours, with the [[Incinerator Bottom Ash|bottom ash]] being retained in the ash box for up to 8 hours before being dropped into a skip. Ram movements are programmed in relation to the number of bins fed.


The flue gases from the [[Incineration]] process then pass through a secondary chamber, or afterburner, where any gaseous products of [[Combustion]] are burned out under oxygen rich conditions. This stage is designed to destroy any [[Wikipedia:Carbon monoxide|Carbon Monoxide]], [[Wikipedia:Volatile organic compound|Volatile Organic Compounds]], and [[Wikipedia:Wikipedia:Dioxins and dioxin-like compounds|dioxins]] and [[Wikipedia:Furan|furans]] produced by the [[Combustion]] process.
The flue gases from the [[Incineration]] process then pass through a secondary chamber, or afterburner, where any gaseous products of [[Combustion]] are burned out under oxygen rich conditions. This stage is designed to destroy any [[Wikipedia:Carbon monoxide|Carbon Monoxide]], [[Wikipedia:Volatile organic compound|Volatile Organic Compounds]], and [[Wikipedia:Dioxins and dioxin-like compounds|dioxins]] and [[Wikipedia:Furan|furans]] produced by the [[Combustion]] process.


The flue gases are then cooled by passing through a waste-heat boiler and economiser, before passing into the final, abatement section of the process. Powdered [[Wikipedia:Lime (material)|lime]] (Calcium Hydroxide) and powdered [[wikipedia:Activated carbon|activated carbon]] are added to the flue gases entering the abatement process to remove acid gases, heavy metals and residual [[Wikipedia:Dioxins and dioxin-like compounds|dioxins]] and [[Wikipedia:Furan|furans]] before discharge to atmosphere from the stack. The flue gases being discharged from the stack are continuously monitored for [[wikipedia:Hydrogen chloride|Hydrogen Chloride]], [[wikipedia:Sulfur dioxide|Sulphur Dioxide]], [[Wikipedia:Carbon monoxide|Carbon Monoxide]], [[Wikipedia:Nitrogen oxide|Oxides of Nitrogen]], particulate matter (dust), [[Wikipedia:Volatile organic compound|Volatile Organic Compounds]], [[Wikipedia:Oxygen|oxygen]] and [[Moisture Content|moisture content]].
The [[Flue Gas|flue gases]] are then cooled by passing through a waste-heat boiler and [[wikipedia:Economizer| economiser]], before passing into the final, abatement section of the process. Powdered [[Wikipedia:Lime (material)|lime]] (Calcium Hydroxide) and powdered [[wikipedia:Activated carbon|activated carbon]] are added to the [[Flue Gas|flue gases]] entering the abatement process to remove acid gases, heavy metals and residual [[Wikipedia:Dioxins and dioxin-like compounds|dioxins]] and [[Wikipedia:Furan|furans]] before discharge to atmosphere from the stack. The flue gases being discharged from the [[wikipedia:Chimney|stack]] are continuously monitored for [[wikipedia:Hydrogen chloride|Hydrogen Chloride]], [[wikipedia:Sulfur dioxide|Sulphur Dioxide]], [[Wikipedia:Carbon monoxide|Carbon Monoxide]], [[Wikipedia:Nitrogen oxide|Oxides of Nitrogen]], particulate matter (dust), [[Wikipedia:Volatile organic compound|Volatile Organic Compounds]], [[Wikipedia:Oxygen|oxygen]] and [[Moisture Content|moisture content]].


The [[Incineration|incineration]] process produces two residues; bottom ash and spent lime. The bottom ash is sent to a recycling transfer station for reprocessing, the bulk of the material ultimately ending up as a [[Landfill|landfill]] cover material. The spent lime, which is the residue from the flue gas abatement process, went to a site in Leeds where it is used to neutralise acidic wastes.
The [[Incineration|incineration]] process produces two residues; [[Incinerator Bottom Ash|bottom ash]] and [[Fly Ash|spent lime]]. The [[Incinerator Bottom Ash|bottom ash]] is sent to a recycling transfer station for reprocessing, the bulk of the material ultimately ending up as a [[Landfill|landfill]] cover material. The [[Fly Ash|spent lime]], which is the residue from the [[Flue Gas|flue gas]] abatement process, went to a site in Leeds where it is used to neutralise acidic wastes.
{{EAIn|EPR={{#var:epr}}}}
{{EAIn|EPR={{#var:epr}}}}


==References==
==References==

Latest revision as of 07:46, 25 June 2021

Clinical Waste Incinerator operated by SRCL and located adjacent to Knostrop Treatment Works, Leeds, with an annual throughput limit of 17,000 tonnes.


Knostrop Clinical Waste Incinerator
Site Location
Site Location

See HT & Clin → page for a larger UK Wide map.

Waste Licence CP3930XL
Operator SRCL
Operational Capacity 17,000tpa
Number of Lines 2
Region Yorkshire and Humber

Annual Report Data

Year Total In Total Clinical IBA Out ACP Out Op Hours

2019 13200 12940 2584 913 13760
2018 13937 13937 3137
2017 14111
2020 12754 12539 2358 807 15660
2021 10625 10280 2460 705 12246
2022 13198 13017 1921 799 14643


Knostrop Clinical Incinerator, SRCL, Captured from Google Earth June 21, all rights reserved
Knostrop Clinical Incinerator, SRCL, Captured from Google Earth June 21, all rights reserved


Summary

Clinical Waste Incinerator operated by SRCL and located adjacent to Knostrop Treatment Works, Leeds, of a twin-line stepped hearth design, with an annual throughput limit of 17,000 tonnes.

Plant[1]

The Leeds incinerator consists of two streams, known as the East and West streams, each with a nominal throughput of one tonne of clinical waste per hour. The permit sets an annual throughput limit of 8,500 tonnes on each stream, with lower limits on specific waste types. The two streams are independent of each other, so that one stream can still be operated while the other stream is shut down for maintenance.

The two incinerators are of stepped hearth design, with three main combustion hearths and an ash box. Clinical Waste is loaded mechanically direct from the wheeled bins used to deliver the waste, onto the first hearth, and the combustion process commences. Hydraulic rams operate at intervals to push the waste along the first hearth, until it falls off the end onto the second hearth where the waste burns vigorously at a temperature of between 1000 and 1100 degrees Centigrade. The waste is then pushed from the second hearth onto the third hearth, where it burns out to produce an ash. This bottom ash is then pushed into an ash box, where the fixed carbon in the ash is further burned out. The retention time on the hearths is approximately 12 hours, with the bottom ash being retained in the ash box for up to 8 hours before being dropped into a skip. Ram movements are programmed in relation to the number of bins fed.

The flue gases from the Incineration process then pass through a secondary chamber, or afterburner, where any gaseous products of Combustion are burned out under oxygen rich conditions. This stage is designed to destroy any Carbon Monoxide, Volatile Organic Compounds, and dioxins and furans produced by the Combustion process.

The flue gases are then cooled by passing through a waste-heat boiler and economiser, before passing into the final, abatement section of the process. Powdered lime (Calcium Hydroxide) and powdered activated carbon are added to the flue gases entering the abatement process to remove acid gases, heavy metals and residual dioxins and furans before discharge to atmosphere from the stack. The flue gases being discharged from the stack are continuously monitored for Hydrogen Chloride, Sulphur Dioxide, Carbon Monoxide, Oxides of Nitrogen, particulate matter (dust), Volatile Organic Compounds, oxygen and moisture content.

The incineration process produces two residues; bottom ash and spent lime. The bottom ash is sent to a recycling transfer station for reprocessing, the bulk of the material ultimately ending up as a landfill cover material. The spent lime, which is the residue from the flue gas abatement process, went to a site in Leeds where it is used to neutralise acidic wastes.

Waste Tonnage, By Origin

The table shows a list of the Waste for the Permit CP3930XL, that has arrived into sites as reported to the Regulator and then publicised in their reported statistics. The Data was last updated on October 2024. The total reported tonnage arriving at the site was: 5,741.9t.

Where this tonnage exceeds that reported in year of the corresponding annual report, this may be due to the following reasons:

  • Tonnage may have been received but not incinerated, i.e. the material is held pending incineration (the operator return to the EA reports as received whereas the annual report focuses on when the waste is incinerated.)
  • Material may have been received into the site but treated in some other way than incineration.
  • Material may have been received on the but transferred out of site for disposal/treatment at another site rather than incineration on the site.
EWC Code Origin of Waste Tonnes In
18 01 08* North West 1.90
18 01 08* Wirral 0.06
18 01 03* Newark and Sherwood 90.97
18 01 04 North East Lincolnshire 3.86
18 01 08* Scotland 0.04
18 01 09 Antrim and Newtownabbey 6.14
18 01 09 East Midlands 0.97
18 01 03* Cannock Chase 0.00
18 01 03* Stafford 0.09
15 01 10* Stockton-on-Tees 3.06
18 01 03* West Lindsey 0.06
18 02 02* East Riding of Yorkshire 6.10
18 01 04 East Staffordshire 0.10
20 01 99 Leeds 19.70
18 02 02* Bradford 1.98
18 01 03* Rhondda Cynon Taf 0.41
18 01 09 North West 0.59
20 01 99 Bradford 0.44
18 02 03 Wakefield 0.06
18 02 02* North Ayrshire 0.34
18 01 03* Redcar and Cleveland 9.37
18 01 06* Pendle 0.37
18 01 10* Kirklees 0.08
18 01 09 Yorks & Humber 301.48
18 01 03* Eastleigh 0.05
18 01 04 Leeds 18.75
18 01 03* North Northamptonshire 0.76
18 01 03* Mansfield 0.23
20 01 99 Greenwich 3.00
18 01 09 West Lindsey 0.04
18 01 09 Northumberland 0.45
18 01 08* North East 0.30
15 01 10* Yorks & Humber 2.58
18 02 03 North East Lincolnshire 0.17
18 01 03* South Cambridgeshire 0.13
18 01 03* Kirklees 19.03
18 01 08* West Midlands 2.11
18 02 08 North Yorkshire 0.02
18 01 03* Great Yarmouth 0.07
18 01 08* Lisburn and Castlereagh 0.29
18 01 03* Southampton 0.65
18 01 08* Stratford-on-Avon 0.11
18 01 03* Cherwell 0.49
18 01 10* Doncaster 0.00
18 01 08* Belfast 0.77
18 01 03* North West Leicestershire 0.00
18 01 03* North Tyneside 0.95
18 01 09 Wakefield 0.39
18 01 04 North West 8.37
18 02 03 East Riding of Yorkshire 1.87
18 02 08 Yorks & Humber 33.00
18 01 04 York 12.83
18 01 03* Rushcliffe 2.51
18 01 02 Yorks & Humber 1.09
18 01 08* Northern Ireland 0.58
18 01 06* North Tyneside 0.07
18 01 10* North East Lincolnshire 0.05
16 05 06* North East Lincolnshire 0.19
18 01 03* Denbighshire 0.01
18 01 03* Vale of Glamorgan 0.06
18 01 08* Newark and Sherwood 1.24
18 01 03* County Durham 0.00
18 01 03* West Lothian 0.95
18 01 08* North Yorkshire 0.55
18 01 09 North East 13.49
18 01 03* East of England 0.16
18 01 09 Rochdale 0.72
18 01 03* Hartlepool 1.84
18 01 03* Cumberland 0.35
18 01 08* Yorks & Humber 89.83
18 01 06* Bradford 0.00
18 01 08* East Staffordshire 0.25
18 01 06* York 0.02
18 01 04 Bradford 11.83
18 01 06* North Yorkshire 0.01
18 01 08* Hartlepool 0.00
18 01 09 Scotland 0.65
18 01 09 West Midlands 2.90
18 01 01 Yorks & Humber 0.13
20 01 32 Yorks & Humber 0.01
18 01 09 North Yorkshire 12.77
18 01 08* Newcastle upon Tyne 0.89
18 01 03* East Suffolk 0.03
18 01 03* North East 7.51
18 02 08 Antrim and Newtownabbey 2.21
18 02 02* Scotland 0.34
18 01 03* North Lincolnshire 28.27
18 01 09 Leeds 48.29
20 01 99 North East Lincolnshire 1.33
18 01 08* West Lothian 0.22
18 01 09 Nuneaton and Bedworth 0.11
18 02 02* Melton 0.30
18 02 03 King's Lynn and West Norfolk 0.11
18 01 08* Nuneaton and Bedworth 0.19
18 01 04 Worthing 2.16
18 01 03* Fareham 1.80
20 01 99 East Riding of Yorkshire 0.52
18 01 03* Bassetlaw 0.03
18 01 09 North Lincolnshire 0.72
18 01 09 Cheshire West and Chester 0.22
18 01 10* North Yorkshire 0.09
18 01 03* West Midlands 21.90
18 01 09 Derry City and Strabane 0.08
16 05 06* Yorks & Humber 37.06
18 01 09 Doncaster 3.07
18 02 02* Cheshire West and Chester 0.24
18 02 08 North Ayrshire 0.38
18 01 09 East Staffordshire 0.09
18 01 09 Cheltenham 0.07
18 01 03* Derby 4.59
18 01 08* Cheshire East 2.17
18 01 04 Stockton-on-Tees 16.22
18 01 09 Newcastle upon Tyne 1.61
18 01 09 Ceredigion 0.07
18 01 08* West Devon 0.02
18 02 03 West Midlands 0.27
18 02 03 Bradford 1.67
18 01 07 Newark and Sherwood 0.01
18 01 03* Newry, Mourne and Down 0.23
18 01 03* Somerset 8.26
18 01 04 North Yorkshire 14.07
18 02 02* North Lincolnshire 17.05
18 02 02* North East Lincolnshire 1.23
18 01 03* Bridgend 10.63
18 01 04 East Riding of Yorkshire 14.06
18 01 09 Stockton-on-Tees 6.86
18 02 03 North Tyneside 0.02
18 01 04 East Midlands 0.60
18 01 08* Cheshire West and Chester 0.05
18 01 03* North Kesteven 3.65
18 01 03* Gwynedd 0.07
18 01 08* North Lincolnshire 0.22
18 01 08* North Northamptonshire 0.15
18 01 03* Worthing 0.96
18 01 09 West Lothian 0.31
18 01 03* Nuneaton and Bedworth 2.33
18 01 10* Yorks & Humber 0.46
18 01 09 East Riding of Yorkshire 2.67
18 01 03* North Yorkshire 109.28
18 02 02* West Midlands 2.26
18 01 03* Wrexham 0.02
18 01 03* South Tyneside 0.07
18 01 03* Shropshire 0.48
18 02 03 Stratford-on-Avon 0.15
18 01 08* York 0.37
18 01 03* East Lindsey 0.06
18 01 09 South West 7.79
18 01 03* West Devon 0.41
18 01 03* North Devon 0.57
18 01 09 Rhondda Cynon Taf 0.74
18 01 08* Leeds 2.09
18 01 08* North East Lincolnshire 0.11
18 01 03* South Holland 0.10
18 01 06* Leeds 0.38
18 01 04 Boston 46.72
18 01 03* Doncaster 1.19
18 02 02* North West Leicestershire 0.79
18 01 09 York 12.05
18 01 06* Ashfield 0.04
18 01 04 North Lincolnshire 1.16
18 01 08* East Riding of Yorkshire 0.13
18 01 03* Kingston upon Hull, City of 0.17
20 01 99 South Cambridgeshire 0.12
18 02 08 North East 1.28
18 01 09 Stratford-on-Avon 0.03
18 01 04 Shropshire 0.06
18 02 03 North Yorkshire 0.69
18 01 03* Antrim and Newtownabbey 92.12
18 01 09 Northern Ireland 0.10
18 01 08* Stockton-on-Tees 2.76
18 01 04 Redcar and Cleveland 10.47
18 02 08 Leeds 0.03
18 01 03* Hinckley and Bosworth 0.02
20 01 99 Stockton-on-Tees 0.01
18 02 02* East Midlands 0.29
18 01 09 Boston 12.45
18 01 04 Doncaster 4.07
18 01 08* Ashfield 0.70
18 01 04 Yorks & Humber 747.34
18 02 02* York 0.12
18 01 09 Ashfield 10.74
20 01 99 Wakefield 1.00
18 01 03* Cheshire West and Chester 0.34
18 01 04 Scotland 0.38
18 01 03* Belfast 1.63
18 01 09 Denbighshire 0.01
18 01 03* South Gloucestershire 0.04
18 02 02* Kirklees 1.08
18 01 03* East Staffordshire 0.66
18 01 04 West Midlands 0.18
18 02 03 Leeds 2.56
18 01 08* Derby 0.17
18 01 08* Wales 0.03
18 01 08* Antrim and Newtownabbey 369.64
18 01 08* Doncaster 0.01
18 01 08* Cheltenham 0.06
18 01 03* North West 97.18
18 02 03 Stockton-on-Tees 0.29
02 02 02 York 0.17
18 02 02* Mid Suffolk 0.07
18 01 10* Leeds 0.03
20 01 99 Doncaster 0.09
18 01 08* Boston 0.99
18 01 06* West Midlands 0.09
18 01 03* Rochdale 1.31
18 01 03* City of Edinburgh 0.13
18 01 09 Bradford 1.38
18 01 03* East Riding of Yorkshire 71.09
18 01 03* South Staffordshire 0.01
18 01 03* Warwick 1.37
20 01 99 North Lincolnshire 1.11
18 01 10* York 0.05
18 01 06* Yorks & Humber 5.54
20 01 99 York 0.22
18 01 03* Northumberland 12.29
18 02 03 North East 1.73
18 02 08 Kirklees 0.03
18 02 07* Yorks & Humber 0.01
18 01 09 Cheshire East 0.08
02 02 03 Rushcliffe 4.82
18 01 03* Charnwood 0.19
18 02 02* Midlothian 0.21
18 01 03* South West 2.24
18 01 04 Rushcliffe 0.79
18 01 03* Yorks & Humber 1994.17
18 01 06* Derby 0.99
18 01 03* Wales 0.12
18 01 03* Torfaen 0.06
20 01 99 North Yorkshire 0.72
18 01 08* Newry, Mourne and Down 0.07
18 02 03 North Lincolnshire 18.64
18 01 09 Shropshire 0.07
18 01 03* Newcastle upon Tyne 3.85
18 01 08* Bradford 0.07
18 01 03* Cheltenham 0.71
18 01 03* North East Lincolnshire 54.28
18 01 04 Wakefield 5.14
18 01 03* North Somerset 0.27
18 01 03* Carmarthenshire 0.28
18 01 03* Bristol, City of 0.06
18 01 08* Warwick 0.15
18 01 01 York 0.01
20 01 99 Yorks & Humber 114.91
18 02 02* East of England 0.08
18 01 08* East Midlands 2.00
18 01 09 Derby 0.65
18 01 08* Wakefield 0.08
18 01 03* East Midlands 25.32
18 01 08* Derry City and Strabane 2.01
18 01 03* Stockton-on-Tees 109.11
18 01 03* Wakefield 10.11
18 01 03* York 55.96
20 01 99 Kirklees 0.30
18 01 03* Swindon 0.02
18 01 04 Kirklees 8.59
18 02 08 North Lincolnshire 3.74
18 01 03* Scotland 1.33
18 01 03* Bedford 0.07
18 01 08* North West Leicestershire 0.12
18 01 03* Northern Ireland 0.23
18 01 09 Kirklees 11.59
18 01 03* Sunderland 3.43
18 01 08* Sandwell 1.91
18 01 09 Rushcliffe 0.03
18 01 08* Kirklees 1.36
18 01 03* South East 23.37
18 01 03* Ashfield 10.44
18 02 08 East Riding of Yorkshire 0.72
18 01 03* Wirral 2.38
18 01 04 West Lindsey 0.01
18 01 03* Cheshire East 19.03
18 01 03* Bradford 40.54
18 02 08 West Lothian 0.13
18 01 08* Sunderland 0.03
18 01 03* Fermanagh and Omagh 0.08
18 02 03 Yorks & Humber 8.25
18 02 02* Yorks & Humber 38.79
18 02 07* Antrim and Newtownabbey 0.48
18 01 09 Wirral 0.13
18 01 09 North East Lincolnshire 0.81
18 01 08* Rochdale 0.02
18 01 09 Newark and Sherwood 102.31
18 01 03* Gateshead 0.03
18 01 03* Boston 77.26
09 01 01* Yorks & Humber 0.02
18 01 03* Cardiff 0.08
18 02 02* Leeds 8.20
18 02 03 Kirklees 0.05
18 01 03* Lisburn and Castlereagh 0.52
18 01 03* Leeds 350.82
18 01 03* Bolsover 1.08
18 01 03* Derry City and Strabane 0.51
18 02 02* North East 4.67
18 01 04 Ashfield 0.09
18 01 03* Pendle 0.03


References

  1. Annual Performance Report 2020