Recent projects

(1)  Wet Oxidation of industrial organic sludge : Papéterie du Léman, Thonon France

• Wet Oxidation installation for processing the effluents from the production of 600’000 t/year of high quality paper paste.

View of the Wet Oxidation plant installed by Granit

View of the high pressure pumping system for the incoming sludge

View of the high pressure reactors and the battery of heat exchangers

• Processing of 2.5 m³/hour of non biodegradable organics, elimination of 90% of the organics with a residue 100% biodegradable.
• Process with compressed air

• Granit Technologies deliveries:

o   Initial laboratory tests for the full characterization of the process

o   Basic engineering of the full installation, with sludge preparation, Wet Oxidation process, gas cleaning process, effluent post treatment (biology)

o   Detailed engineering of the installation

o   Automation concept

o   Risk analysis

o   Selection of equipment suppliers and local contractors

o   Survey of the construction

o   Assistance for the commissioning, the start-up and the maintenance

o   Operator and technician training for the operation and the maintenance

• The installation is operated now by local operators without any needs of Granit Technologies assistance

(2)  Wet Oxidation of municipal waste water treatment sludge: STEP, Orbe Switzerland

• Processing of non biodegradable organic sludge from the waste water treatment plant of the Swiss city of Orbe (15’000 equivalent inhabitants)

General view of Orbe Wet Oxidation installation built by Granit

• Processing of up to 500 t/year of solids
• Fully automatic installation operating continuously (24 hours /7 days) with one operator.
• Elimination of 80% of the organics during the oxidation process and digestion of the remaining organics for methane production.
• Separation by press filters of the mineral residue for discharge deposit.
• Granit Technologies deliveries:

o   Initial laboratory tests for the full characterization of the process

o   Full engineering and construction of the installation, with sludge preparation, Wet Oxidation process, gas cleaning process, residue processing.

o   Operation and maintenance of the installation

(3)  Pilot plant for waste plastic depolymerisation

• Pilot installation operating at 50 kg/h of waste plastic (polyolefin)

General view of the pilot installation built by Granit

Outlet of diesel oil produced from waste plastic

Diesel oil produced from waste plastic

• Full series of tests to confirm the design and to specify the operating conditions of the full scale installation
• Granit Technologies deliveries together with its engineering partner:

o   Initial development of the process made with an engineering partner

o   Concept engineering

o   Basic and detailed engineering

o   Selection of equipment suppliers and local contractors

o   Survey of the construction

o   Commissioning and assistance to the series of tests

o   Analysis and validation of the results

(4)  Wet Oxidation of municipal waste water treatment sludge: Rovereto Italy

• Processing of non biodegradable organic sludge from the waste water treatment plant of the Italian city of Rovereto (150’000 equivalent inhabitants)

General view of the plant

High pressure pumping system for the sludge

• Processing of up to 3’000 t/year of solids
• Fully automatic installation operating continuously (7days / 24 hours) with two operators.
• Elimination of 85% of the organics during the oxidation process and digestion of the remaining organics for methane production.
• Separation by press filters of the mineral residue for discharge deposit.
• Granit Technologies deliveries:

o   Initial laboratory tests for the full characterization of the process

o   Basic engineering of the full installation, with sludge preparation, Wet Oxidation process, gas cleaning process, effluent post treatment (biology)

o   Automation concept

o   Risk analysis

o   Selection of equipment suppliers and local contractors

o   Survey of the construction

o   Assistance for the commissioning, the start-up and the maintenance

o   Operator and technician training for the operation and the maintenance

(5)  Mock-up installation for processing organic resins from nuclear power plant

• Design, construction and operation of a mock-up installation of Wet Oxidation process for processing organic resins used to purify water circuits in nuclear power plant.

Reactor of the mock-up Wet Oxidation installation

Resins before and after the treatment

• Fully automatic installation for 1 litre / hour flow. Treatment of residual gas and separation of solid phase.
• A full scale installation has been designed for a nuclear site in Italy (in dismantling phase) in collaboration with Ansaldo Nuclear S.p.A.
• Granit Technologies deliveries:

o   Initial laboratory tests for the full characterization of the process

o   Full engineering and construction of the mock-up installation, including risk analysis and full automation, with effluent preparation, Wet Oxidation process, gas cleaning process, effluent post treatment (concentration)

o   Basic engineering of the full scale installation