Autothermal pyrolysis as a means of intensification: PRESENTATION ONLY

Pedros, P.1 and Brown, R.2, 1Mott MacDonald, UK, 2Iowa State University, USA


• Thermochemical Processes Emerging in US
• Reasons for Interest in Thermochemical Processes in US
• Reconsideration of Definition of Pyrolysis
• Challenges of Sewage Sludge Biosolids as a Feedstock
• Pyrolysis of Sewage Sludge
• Autothermal Pyrolysis and Benefits
• Summary

Reason for Interest in the United States
• Increasing hauling and disposal costs
• Reduction in sludge volume (85 – 90%) less supplemental energy.
− Produces gaseous fuel (non-condensable & condensable)
− Fuel is burned and the thermal energy recovered for drying
• Easier to Permit
− Doesn’t fall under requirements of Sewage Sludge Incinerator (SSI) rule
• Carbon sequestration
• PFAS is removed from biochar
− Fate in gaseous emissions not yet known

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