Waste Treatment Plant Sofia, Bulgaria

Project: Implementation of Phase II of the Project “Integrated system of solid waste treatment facilities of Sofia Municipality– Design and Construction of a Mechanical-Biological-Treatment (MBT) Plant for processing waste and production of Refuse Derived Fuel”

• Employer: Municipality of Sofia, Bulgaria
• Contractor:  Consortium Aktor S.A. – Helector S.A.
• Type of contract: F.I.D.I.C (International Federation of Consulting Engineers) based contract of type Design-Build (Yellow Book).
• Type of project: Design, Build, Commissioning and Trial Operation.
• Capacity: 410.000tn/year of municipal solid waste (MSW)

The Project includes design, construction, commissioning and trial run of “Plant for Mechanical Biological Treatment of Waste and Production of RDF-fuel” of capacity 410.000tonnes per year.

More specifically, the following process are performed in the MBT Plant:

• Acceptance and pre-treatment of the incoming solid municipal waste.
• Mechanical separation and sorting of recyclables materials.
• Bio-drying of the waste.
• Mechanical treatment of the bio-dried material for the separation of the recyclable fractions and production of RDF.
• Biological composting of the organic fraction.
• Mechanical treatment of compost for the production of compost-like output (CLO).
• The infrastructural/auxiliary facilities of the Plant for MBT of waste include:
• Dust and odor removal system consisting of bag filters, biofilters, scrubbers and stacks.
• Wastewater water treatment plant.
• RDF storage building.
• CLO storage building.
• Storage building for the separated recyclable materials.
• Water supply and sewage networks.
• Reduction and distribution substation 110/20 KV and transformers.
• Water supply and sewage net works
• Process water tank
• Electronic weighbridge.

The entire process in the MBT Plant is managed by an automated data control and acquisition system (SCADA system)