banneredit
3,643
edits
Dimmer Landfill Site: Difference between revisions
m
change template
m (→Summary) |
m (change template) |
||
| (15 intermediate revisions by 3 users not shown) | |||
| Line 2: | Line 2: | ||
[[Category:Non-Haz Landfill]] | [[Category:Non-Haz Landfill]] | ||
==Summary== | ==Summary== | ||
Dimmer | [[Dimmer Landfill Site]] was developed from 1970 onwards, initially by Wincanton Rural District Council and then from 1974 onwards by [[Somerset County Council]]. The [[Landfill]] site came to be operated by [[Viridor]] following the sale of [[Wyvern Waste Services Limited]] to Viridor in 2006. Dimmer was one of two operational sites that passed to Viridor at that time. The most recent parts of the site are operated to [[Landfill Directive]] compliant standards. | ||
It is understood that some of the permitted capacity may not be filled for commercial reasons. | It is understood that some of the permitted capacity may not be filled for commercial reasons. | ||
==History== | ==History== | ||
Dimmer landfill was opened in 1970 by Somerset County Council and was operated directly by them until responsibility was passed to Wyvern Waste Services Limited (WWS). WWS was a LAWDC (Local Authority Waste Disposal Company) formed by Somerset County Council in 1991; the assets at Dimmer were passed to WWS in 1992. | Dimmer landfill was opened in 1970 by Wincanton Rural District Council. In 1974, following local government re-organisation, control was passed to [[Somerset County Council]] and was operated directly by them until responsibility was passed to [[Wyvern Waste Services Limited]] (WWS). WWS was a [[LAWDC]] (Local Authority Waste Disposal Company) formed by Somerset County Council in 1991; the assets at Dimmer were passed to WWS in 1992. | ||
Somerset County Council sold its LAWDC to Viridor in 2006, the company name subsequently changing to Viridor Waste (Somerset) Limited in June 2006. | Somerset County Council sold its LAWDC to Viridor in 2006, the company name subsequently changing to Viridor Waste (Somerset) Limited in June 2006. | ||
| Line 15: | Line 15: | ||
The site is comprised of two principal parts - the original site and the extension area, but to all intents and purposes, the two sites are operated as one site. The site is a landraise (rather than a landfill) being constructed above original ground levels with no mineral extraction for off-site sale. | The site is comprised of two principal parts - the original site and the extension area, but to all intents and purposes, the two sites are operated as one site. The site is a landraise (rather than a landfill) being constructed above original ground levels with no mineral extraction for off-site sale. | ||
The Waste Management Licence was changed to an Environmental Permit in 2003/4 as required by the changing legislation at the time. | The [[Waste Management Licence]] was changed to an [[Environmental Permit]] in 2003/4 as required by the changing legislation at the time. | ||
There have been several [[Planning_Permission|planning permission]]s for the site since 1970, none of which imposed an end-date to landfilling operations. In 2015, Viridor sought planning permission to construct and operate a [[Waste_Transfer_Station|waste transfer station]] at the site which was intended to divert wastes to non-landfill final disposal, notably [[Energy_from_Waste|energy-from-waste]] in Avonmouth and Oxfordshire. This proposal received approval in 2015 as permission 15/00372/CPO. The application documents stated that the landfill would close prematurely in 2016 and that a separate planning application would be made to alter the approved restoration contours/[[Landfill Settlement Contours]] of the landfill to take account of this. To date, no such application has been listed on Somerset County Council's planning portal.<ref>https://planning.somerset.gov.uk/</ref>. | |||
==Geology== | ==Geology== | ||
| Line 24: | Line 24: | ||
==Engineering and Environmental Control== | ==Engineering and Environmental Control== | ||
The | The [[Landfill]] is constructed as a [[Landfill|Containment Facility]], utilizing the underlying clay materials as the principal barrier. In the most recently constructed parts of the site, the landfill lining system is augmented with a flexible membrane liner of High Density Polyethylene (HDPE) on the base. As the site is a land-raise rather than a landfill, there are no sidewall barriers. In cross-section the site is lens-shaped: the base is an approximate mirror of the upper surface | ||
There is Landfill Gas power generation with electricity export to the National Grid. Installed capacity is 2.96MW | There is [[Landfill Gas]] power generation with electricity export to the National Grid. Installed capacity is 2.96MW <ref>Ofgem Summary of Installed Capacity</ref> | ||
Viridor have been unable to secure a connection to the local sewerage system, principally due to a lack of local treatment capacity at the receiving Sewage Treatment Works. There is an on-site leachate treatment plant that discharges to a local watercourse. Dry weather flow in the receiving watercourse is low and consequently, the standards required to be achieved to discharge are sometimes difficult to achieve. Viridor have installed tertiary treatment via reedbeds and other growing media in order to permit discharge at times of dry weather. | Viridor have been unable to secure a connection to the local sewerage system, principally due to a lack of local treatment capacity at the receiving [[Sewage Treatment Works]]. There is an on-site leachate treatment plant that discharges to a local watercourse. Dry weather flow in the receiving watercourse is low and consequently, the standards required to be achieved to discharge are sometimes difficult to achieve. Viridor have installed tertiary treatment via reedbeds and other growing media in order to permit discharge at times of dry weather. Occasionally, leachate produced by the site is removed by tanker to appropriately permitted Sewage Treatment Works.<ref>Ellard Associates data</ref>. | ||
==Other Infrastructure== | ==Other Infrastructure== | ||
Elsewhere within the site complex, Viridor also developed an In-vessel Composting (IVC) facility to deal with some of Somerset County Council's separately collected Green Waste. This facility is no longer in operation and has been converted to be used a Waste Transfer Station. | Elsewhere within the site complex, Viridor also developed a [[Composting]] facility and an [In-vessel Composting]] ([[IVC]]) facility to deal with some of [[Somerset County Council]]'s separately collected [[Green Waste]] and some [[Food Waste]]. This facility is no longer in operation and has been converted to be used as a Waste Transfer Station. Whilst a planning consent was granted for an [[Anaerobic Digestion]] facility this was not built, with this infrastructure being built at [[Walpole Recovery Facility and Landfill Site]] instead. | ||
{{NHLFTable|Permit=UP3139BB}} | {{NHLFTable|Permit=UP3139BB}} | ||
==References== | ==References== | ||
<references /> | <references /> | ||