Dimmer Landfill Site: Difference between revisions
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The landfill is constructed as a Containment Facility, utilizing the underlying clay materials as the principal barrier. 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 lense-shaped: the base is an approximate mirror of the upper surface | The landfill is constructed as a Containment Facility, utilizing the underlying clay materials as the principal barrier. 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 lense-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 | There is Landfill Gas power generation with electricity export to the National Grid. Installed capacity is 2.96MW. [1] | ||
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 time sof dry weather. Occassionally, leachate produced by the site is removed by tanker to appropriately permitted Sewage Treatment Works. | 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 time sof dry weather. Occassionally, leachate produced by the site is removed by tanker to appropriately permitted Sewage Treatment Works. | ||
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==References== | ==References== | ||
<references /> | <references /> | ||
Ofgem Summary of Installed Capacity | |||
Revision as of 13:48, 25 November 2020
| Dimmer Landfill Site | |
 See Non-Hazardous Landfill → page for a wider UK perspective. | |
| Waste Licence | UP3139BB (UP3139BB) |
| Operator | Valencia Waste |
Void
| Year | Total Void[1] |
|---|---|
| 2018 | 745494 |
| 2019 | 603931 |
Summary site information collated from a variety of sources
including: Monksleigh, Ellard Associates, EA, WasteDataFlow,
SEPA, NRW, DEFRA, BEIS and owner and developer websites
Summary
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.
Somerset County Council sold its LAWDC to Viridor in 2006, the company name subsequently changing to Viridor Waste (Somerset) Limited in June 2006.
Some of the land used by the site was previously used as a ordnance dump during the second world war by the US military; very limited evidence of the former use is still visible on the site. Otherwise the land occupied by the site has historically been agricultural land.
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 capacity at the site as originally granted Planning Permission was circa xxxxx cubic metres; this was subsequently increased upon approval of an extension in xxxx to around xxxx cubic metres.
Geology
The site is underlain by interbedded mudstone and limestone of the Langport Member, which is of late Triassic and early Jurassic age and forms part of what is known as the Blue Lias. Excavations and site investigation at the site suggest that locally this largely comprises low-permeability lithologies.
Engineering and Environmental Control
The landfill is constructed as a Containment Facility, utilizing the underlying clay materials as the principal barrier. 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 lense-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. [1]
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 time sof dry weather. Occassionally, leachate produced by the site is removed by tanker to appropriately permitted Sewage Treatment Works.
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.
Tonnage Handled
Only Waste Codes receiving over 5,000t are shown.
Waste Tonnage, EWC List
The table shows a list of the Waste for the Permit UP3139BB, that has arrived into sites as reported to the Regulator and then publicised in their reported statistics. The Data used is the most current. The total reported tonnage arriving at the site was: Expression error: Unexpected < operator.t.
| EWC Code | Description | Tonnes In |
|---|
References
- ↑ Units are in m3 for England and Wales, and Tonnes for Scotland.
Ofgem Summary of Installed Capacity