Paper details

Title:

The Use of Intermediate Pyrolysis Process to Increase the Energy Recovery from Sewage Sludge

Author(s):

Samanya, J., Hornung, A., Jones, M., Vale, P.

Document(s):

Abstract:

Intermediate pyrolysis was applied to dried digested sludge at 500°C and yielded an average of 48 wt% char, 40 wt% bio­oil and 12 wt% non condensable gases. The bio­oil contained two phases, the (top) oil phase and the (bottom) aqueous phase. The oil phase had a higher heating value of 36 MJ/kg with a pH of 9.62. The oil phase shows good properties for fuel application that can be used in a combined heat and power system and suitable blend mixtures are being investigated. The aqueous phase will be used in an anaerobic digestion for the production of methane biogas. The pyrolysis char was found to have a nitrogen content of 3.12 wt% with a heating value of 11.22 MJ/kg. The high nitrogen content supports using the char as a fertilizer. The analysis of the pyrolysis char shows that it is within the heavy metal limits set by the EU.

Keywords:

biomass, char, combined heat and power generation (CHP), pyrolysis, sewage sludge, bio-oil

Topic:

Biomass Conversion Technologies for Heating, Electricity and Chemicals                  

Subtopic:

Pyrolysis for power, CHP, polygeneration and chemicals

Event:

19th European Biomass Conference and Exhibition

Session:

VP2.5.6

Pages:

1638 - 1641

ISBN-13:

978-88-89407-55-4

ISBN-10:

88-89407-55-7

Paper DOI:

10.5071/19thEUBCE2011-VP2.5.6

Price:

FREE