Mechanical Biological Treatment Facility Modifications

EWCE were appointed as Principal Contractor to deliver civil engineering modifications at two Mechanical Biological Treatment (MBT) plants; namely Bredbury Parkway, Stockport and Cobden Street, Salford.

The Bredbury Parkway MBT/Anaerobic Digestion (AD) facility provides the capability for incoming mixed waste materials to be processed and sorted into large (mainly inorganic and small (mainly organic) particle fractions.

The process allows the recovery of a high calorific value refuse derived fuel (RDF) together with recyclable materials (glass, plastic, metals, etc.) from within the large particle range and mixes the small particle materials with water to form a slurry prior to being biologically treated using microbial activity under controlled anaerobic conditions. This produces methane gas, which is recovered to fuel engines for electricity generation, and a low calorific value refuse derived fuel.  The mechanical processing hall is designed for an annual throughput of 110,000 tonnes and the AD process is designed for 60,451 tonnes per annum.

The scope of works increased considerably from the tender, EWCE brought in M & E Contractor, Eric Wright Water.

The works included:

Both Sites

• Provision & maintenance of site establishment and welfare facilities together with CDM area
• Removal of existing mechanical and electrical equipment
• Demolition of existing push walls
• Reinstatement of floor in area where push walls were demolished
• Cast in-situ reinforced concrete base slab
• Construction of new push walls

Bredbury Site

• Install new double access door to new pre-shredder area, along with ancillary external modifications to footpath, new dropped kerb and crash barrier removal
• Create new conveyor opening in 750mm thick reinforced concrete wall
• Reinstatement of the GL8 fire wall with breeze block in location of removed conveyor; then cover with cladding
• Design and install a new steel access stairway & platform to 2no storerooms
• Rip out and replace with longer compactor rails
• Installation of new conveyors and associated equipment (supervision of M & E contractor and process engineering contractors Vecoplan and Pakawaste)
• Removal of site establishment and handover of CDM area back to the site operator

Cobden Street

• Infill existing 2650 x 2200 conveyor opening with cladding to match existing fire wall detail
• Infill existing 2650 x 2600 conveyor opening with cladding to match existing fire wall
• Alteration to existing 2200 x 1900 conveyor opening
• Install new lintel and infill above it with blockwork
• Increase existing conveyor opening width from 2200 to 2500; break out concrete wall to lower existing opening by circa 800
• Supervision of M & E contractor and process engineering contractor, Eggersman
• Removal of site establishment and handover of CDM area back to the site operator