Receptory site in Kemi

Conclusions of thermal treatment:

• High capacity (40-80t/h) allows reasonable time schedules in bigger projects
• Post treatment monitoring is minimal
• Versatility of the method allows high variation of the contamination level and compounds in the input material
• The method is quite insentive of the moisture and soil type of the input material
• The space requirement is low (40m*60m)
• Comparison of the total costs to other treatment methods, make thermal treatment very attractive alternative
• Emission control and mass balance are easy to make

Kotka oli harbour 2003–2006

Savaterra Greenfix at old Kotka oil harbour.

• Contaminants: oil, solvents and lead
• Concentration: average. 4000 mg/kg
• Amount: treated 100 000 t
• Duration: October 2003 – August 2006. In the winter time  (4 months per year) the site was closed.
• Residual concentration after remediation was on average 128mg/kg
• Treated material was reused for construction purposes on-site and is now a very popular PARK!

State railway company SNCF, Chambly, France

In 2012 Savaterra Oy completed its biggest polluted soil remediation project overseas in France. Thermal station was transferred to Chambly, suburban area of Paris, by ship and road freight.

On the project target had located old creosote plant and sleeper impregnation, from the effect of which soil had high concentrations of PAHs and oil hydrocarbons. 

Totally was purified 59 300 t polluted soil and PAH concentrations must have been less than the limit value of 50 mg/kg, when the initial concentrations ranged between 1000-2000 mg/kg.

The work was carried out as a consortium with a local company specializing in earth and environmental construction.

Old creosote impregnation site

• Pollutants: Oil hydrocarbons and PAH
• Levels of pollutants on average: PAH 30000 mg/kg, Oil 20000 mg/kg
• Total amount of thermally treated soil 60 000 t
• Target after treatment: PAH 50mg/kg, Oil 2500mg/kg

Guangzhou, China 2016

In 2016 Savaterra Oy completed remediation of old steel factory subsoils by using thermal desorption method. The equipment was transferred by sea freight to China in spring 2016. The area was located in the center of Guangzhou city. In accordance with the project progress the area was converted to housing area with brand new block of flats. New buildings and residents were in the distance of around 400m from the remediation plant in operation. Since the former steel factory land area became into residential use, cleaning treatment levels were very strict. Pollutants were mainly PAHs (EPA 16). Initial concentration was in average PAH EPA 57-2027mg/kg. Achieved final concentrations after remediation process were PAH compounds 0.63-5mg/kg (compound-specific values). Soil material was very fine (silt).

The work was carried out Savaterra as subcontractor with a local company specializing in earth and environmental construction. 

Old steel factory site

• Pollutants: PAH EPA 16
• Levels of pollutants on average: PAH EPA (16) 57–2027 mg/kg
• Total amount of thermally treated soil 45 000 t
• Target after treatment: PAH 0.63–5mg/kg

Polluted soil On-site projects

Pornainen, Finland, 2000-2002

• Several different: thermal treatment
• Oilhydrocarbons
• Before treatment average 7000mg/kg
• Treated material amount 20 000t
• After treatment average 300mg/kg

Maarianhamina, Finland, 2002

• Maarianhamina old oil harbour: demolition of old building, crushing and thermal treatment. Excavation done on seaside.
• Oilhydrocarbons
• Before treatment average 10000mg/kg
• Treated material amount 20 000t
• After treatment average 100 mg/kg

Kotka, Finland, 2003-2004

• Puistolanniemi old oil harbour: demolition of old building, crushing and thermal treatment. Excavation done on seaside.
• Oilhydrocarbons and VOC
• Before treatment average oils 4000mg/kg and VOC mg/kg 200-300mg/kg
• Treated material amount 80 000t
• After treatment average oils 150mg/kg and VOC 10 mg/kg

Elverum, Norway, 2005-2006

• Old wood impregnation site: excavation, crushing and thermal treatmenti.
• Oils and PAH
• Before treatment average oils 8575mg/kg and PAHs 2202mg/kg
• Treated material amount 18 000t
• After treatment oils 35mg/kg and PAHs 3mg/kg

Polluted soil Off-site projects

Koivissilta, Vihti, Finland, 2004-2008

• Polluted soil receptory site operated by Savaterra
• Oils, VOCs, heavymetals, PCBs, CPs, PCDD/Fs
• Reception of polluted soil per year 20 000t
• Recycled to constraction material

Rantasalmi, Finland, 2003 ->

• Polluted soil receptory site operated by Savaterra
• Oils, VOCs, heavymetals, PCBs, CPs, PCDD/Fs
• Reception of polluted soil per year 20 000t
• Recycled to constraction material

Kemi, Finland, 2003 ->

• Polluted soil receptory site operated by Savaterra
• Oils, VOCs, heavymetals, PCBs, CPs, PCDD/Fs
• Reception of polluted soil per year 100 000t
• Recycled to constraction material

Pateniemi, Finland, 2011

• Old saw mill: thermal treatment at Kemi receptory site
• Dioxins and furans, chlorophenols
• Before treatment max dioxins and furans max >2 000 000 ng/kg, chlorophenols 1000mg/kg
• Treated material amount 15 000 t
• After treatment dioxins and furans max >1000 mg/kg, chlorophenols 40mg/kg

Community waste water sludge treatment to organic fertiliser

Sipoo, Finland, 2008-2012

• Treatment of anaerobic sludge to organic fertiliser according to EU2007 legislation
• Microbiology, and chemical physical parameters
• Treated material amount 70 000t per year
• Organic fertiliser according to EU 2007 legislation

Vaasa, Finland, 2007

• Treatment of anaerobic biowaste sludge to organic fertiliser according to EU2007 legislation
• Microbiology, and chemical physical parameters
• Treated material amount 10 000t per year
• Organic fertiliser according to EU 2007 legislation