Over the course of our involvement at the Bennadrove Landfill Site near Stornoway, which spans well over 20 years, Phoenix has designed and installed many updates and additions to the leachate treatment facility at the landfill site. In this case study, we report on our latest work.
The landfill site has for some years now only accepted residual waste after comprehensive recycling of both the organic and the inorganic content in the community Materials Recovery Facility (MRF) on the island. Nevertheless, although the waste input volumes are small the community seeks to protect the local peatland ecology to the highest standard and uses sophisticated leachate collection and treatment technology to ensure the protection of the environment.
Our involvement began in the Autumn of 1993 when Phoenix Engineers commissioned a 130 m3/day sequencing batch reactor (SBR) aeration plant for watercourse discharge.
Equipment installed in the new landfill cell for leachate extraction and delivery to the leachate treatment works.
Bennadrove Leachate Treatment Plant Upgrade
Client: CNES
Project Value: £200K
Project Period: MAY 2022 TO JUNE 2022
Comhairle Nan Eilean Siar has formed a new cell on their Bennadrove landfill at Stornoway, Isle of Lewis.
Phoenix was contacted to extend the existing infrastructure which Phoenix originally installed and has upgraded and modified over several years.
Contract
The scope of work was agreed upon with the Waste Disposal Operations Officer. After pricing the work was awarded as a simple purchase order.
The work comprised:
Main Control Panel Upgrade
Bennadrove Landfill Leachate Treatment Plant – Updated control system
The contract included several parts including:
- Rebuild of MCC
- Additional distribution
- Power Factor Correction
- Sub-main to new cell
- Kiosk at cell G
- Distribution
- Pump controls
- Pump installation
- Cabling to floodlights
- Install floodlights
- Earth infrastructure
- Replacement of NaOH dosing set
- Full BS7671 certification
- Fibre cable link to Cell G
- Upgrade of CCTV & SCADA
- Installation of pumps, valves, EAVs, Flow meters, and pipelines
- Cell head works
- Valve station within the kiosk
- New distribution kiosk to the side of the control room
Cell G Pumping System
New landfill cell leachate extraction equipment.
The system includes options to alter the source and destination of pumping which is all software controlled.
10 engineers were involved in the contract.
A pdf version of this case study is available for downloading below:
