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Taking the hazard out of waste management

Taking the hazard out of waste management. Site History. 1974 Original High Temperature Incinerator plant built by BEC 1982 Site sold to Rechem International 1990 Rotary kiln installed & solids handling systems improved 1992 Rechem sold to Shanks & McEwan

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Taking the hazard out of waste management

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  1. Taking the hazard out of waste management

  2. Site History 1974 Original High Temperature Incinerator plant built by BEC 1982 Site sold to Rechem International 1990 Rotary kiln installed & solids handling systems improved 1992 Rechem sold to Shanks & McEwan 1995 Shanks & McEwan business restructured into Shanks Waste Services (Landfill & Recycling) Shanks Chemical Services (Incineration & Treatment & Transfer) 2002 Waste to Energy Fluidised Bed Incinerator Commissioned 2005 Shanks Chemical Services sold to Onyx 2006 (February) Veolia – corporate rebranding of all their divisions 2006 (October) Veolia forced to sell Fawley incinerator due to EU commission ruling following their acquisition of Cleanaway May 2007 – Pyros Environmental Ltd Taking the hazard out of waste management

  3. Fawley High Temperature Incinerator (HTI) Situated within a large petrochemical complex on an old gravel pit Permitted Capacity - 45,000Te per annum Thermal Capacity - 24 MW c. 90 employees based at Fawley Taking the hazard out of waste management

  4. High Temperature Incineration Burns solid, liquid and gaseous waste at >1100 deg Celsius. Complete destruction of waste in an oxygen rich environment. Suitable for handling large volumes of very hazardous waste. Restricted number of H.T.I. in the UK. Taking the hazard out of waste management

  5. Why use HTI? Legislation Some waste has no legal alternative to incineration. Environmental Waste is safely handled and does not pollute land or water. Economic A secure and reliable outlet which increasingly competes on price. Security Ensures complete destruction. Taking the hazard out of waste management

  6. HTI Schematic overview Taking the hazard out of waste management

  7. Rotary Kiln Refractory lined steel drum 12 Metres x 4.5 Metres Liquids fed via burners and lances Solids fed via automated drum conveyor / shredder / bulk solid feed system Kiln temperature between 1100oC - 1200oC Solids residence time 2 - 4 Hours Taking the hazard out of waste management

  8. Afterburner Chamber Temperature 1120oC - 1150oC Virgin Fuels used for start-up Residence time for gases ~ 4 seconds Destruction efficiency is > 99.99995% Taking the hazard out of waste management

  9. Gas Cleaning Plant Quench Addition of water to cool the gases from 1100oC to 85oC in < 1/3 of a second Prevent the formation of dioxins Caustic (Sodium Hydroxide) added to neutralise acid gases -Spin Vane Separator removes coarse dust and water droplets Absorber (Scrubber) Packed column - to remove majority of dust Remaining acidity neutralised 2 Electrostatic Precipitators Remove the smaller particles of dust Conditioning Air Heated air to remove visibility of plume Stack Continual monitoring of emissions Taking the hazard out of waste management

  10. Effluent Treatment Plant Standard physio-chemical treatment Chemical dosing and pH control to remove soluble heavy metal compounds Clarifier – flocculent added to help settle suspended solids into a sludge which is pressed Filtration Bag filter Carbon Filter Batch analysis of effluent Discharge to estuary Taking the hazard out of waste management

  11. Automated Control Systems Process Control System (PCS) Direct monitoring Operation of the incineration process with waste interlocks Plant designed to shut down safely in the event of an interruption to the utility supply Safety Shut-Down System(SSDS) Monitors key safety parameters (in triplicate) Solid state device not reliant on software Controlled shut-downs and start-ups An updated version of the first of its kind in the hazardous waste industry Taking the hazard out of waste management

  12. Licences and Accreditation Top tier COMAH site PPC licensed at the end of 2005 ISO 9001 (Quality) compliant ISO 14001 (Environment) compliant RSA93 Authorisation Taking the hazard out of waste management

  13. Radioactive Waste Taking the hazard out of waste management

  14. Capability Authorisation under RSA 93 for: Accumulation of Relevant Waste Disposal of Relevant Waste by incineration on the premises Discharge of solid, liquid and gaseous process wastes Most comprehensive incineration authorisation within the UK to accept: Carbon-14 and tritium wastes Iodine-125, iodine-131, Phosphorus-32 & Sulphur-35 Other beta/gamma wastes Alpha emitters Taking the hazard out of waste management

  15. Accumulation Limits Volume: 60m3 Time: 90 Days Activity: Carbon-14 and tritium 1.6 TBq Iodine-125, iodine-131, } 2 GBq Phosphorus-32 & Sulphur-35 } Other beta/gamma wastes 1 GBq Alpha emitters 40 MBq Taking the hazard out of waste management

  16. Incineration Limits Volume: No Limit Activity: Carbon-14 and tritium 1200 GBq/Month Iodine-125, iodine-131, } 1 GBq/Month Phosphorus-32 & Sulphur-35 } Other beta/gamma wastes 500 MBq/Month Alpha emitters 40 MBq/Month Taking the hazard out of waste management

  17. Acceptance Criteria Activity must be dispersible Waste must be suitable for processing via: DSL (fully pumpable liquid up to 200ltr) or Hoist (Solid up to 200ltr & Sludge up to 25ltr) Packaging must comply with current transport regulations External Dose Rate < 5uSv/hr preferred Further conditions set out in CFA including drum limits for different groups of isotopes Taking the hazard out of waste management

  18. Exempt NORM Waste Waste can also be processed via shredder (1m x 1m x 1m) Packaging must comply with transport regulations External Dose Rate < 5uSv/hr preferred Characterisation and declaration stating waste is within exemption order limits Taking the hazard out of waste management

  19. Waste to Energy Taking the hazard out of waste management

  20. Waste to Energy Commissioned in 2002 Fluidised bed incinerator with energy recovery Commissioned on Meat and Bone Meal (MBM) Now trialling and running on alternative wastes including hazardous waste. Exports 6MW/hr of electricity to the national grid Taking the hazard out of waste management

  21. Summary Developed, proven technologies Avoiding problems associated with landfill regulations Reducing volumes and treats hazards prior to landfill Incineration is BPEO for most low level radioactive wastes Working to the highest standards Professional and dedicated team Taking the hazard out of waste management

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