Sewage sludge valorisation by means of pyrolysis and gasification

Authors

  • Isabel Fonts Aragon Institute of Engineering Research, University of Zaragoza
  • Maria Aznar Aragon Institute of Engineering Research, University of Zaragoza
  • Javier Abrego Aragon Institute of Engineering Research, University of Zaragoza
  • Gorka Garcia Aragon Institute of Engineering Research, University of Zaragoza
  • Luisa Lazaro Aragon Institute of Engineering Research, University of Zaragoza

DOI:

https://doi.org/10.15626/Eco-Tech.2007.086

Keywords:

Sewage sludge; Pyrolysis; Gasification; Waste valorisation, Laboratory scale plant

Abstract

In this work, the main results about the investigations into the pyrolysis and the gasification of
sewage sludge of the Thermo-chemical Processes Group are being presented, Pyrolysis has
been carried out in three different experimental systems: two kinds of fixed bed reactors and a
fluidized bed reactor, In these experiments, the influence of the operational conditions on
product distribution and on some characteristics of these products has been studied, Pyrolysis
of sewage sludge in fluidized bed has been studied in order to maximize liquid fuel product
yield and optimize its composition. In fixed bed pyrolysis experiments, the influence of
pyrolysis conditions on the production of a solid product (char) and its adsorbent properties
have been studied. Gasification of sewage sludge has been studied in fluidized bed with the
aim of finding the operational conditions that maximize the production of gas and minimize
the presence of tar in this gas.

Metrics

Metrics Loading ...

References

Chalas, J .G., Tchobanoglous, G., Burton, F.L., 1995. lngenieria de aguas residuales: Tratamiento, vertido y utilizacion, Tercera Edicion, Metcalf and Eddy, McGraw-Hill Espania.

Directive 2006/ 1 2/EC of the European Parliament and of the council of 5 April 2006 concerning waste.

Bridgwater, T., 2006. Biomass for Bioenergy. Journal of the Science of Food and Agriculture, 86, 1755- 1768. https://doi.org/10.1002/jsfa.2605

Bridgwater, A.V., Meier, D., Radlein, D., 1999. An overview of fast pyrolysis of biomass, Organic Geochemistry 30, 1479- 1493. https://doi.org/10.1016/S0146-6380(99)00120-5

Bagreev, A., Bandosz, T. J., Locke, D.C., 2001 . Pore structure and surface chemistry of adsorbents obtained by pyrolysis of sewage sludge-derived fertilizer. Carbon 39, I 3, 1971 -1979. https://doi.org/10.1016/S0008-6223(01)00026-4

Manya, J. J., Sanchez, J. L., Abrego, J., Gonzalo, A., 2006. Influence of gas residence time and air ratio on the air gasification of dried sewage sludge in a bubbling fluidised bed. Fuel, 85, 14-15, 2027-2033. https://doi.org/10.1016/j.fuel.2006.04.008

Oasmaa, A., Peacocke, C., Gust, S., Meier, D., Mclellan, R., 2005. Nonns and Standards for Pyrolisis Liquids. End-User Requirements and Specifications. Energy & Fuels, 19, 2155-2163. https://doi.org/10.1021/ef040094o

Aznar, M., Gonzalez, A., Manya, J.J., Sanchez, J.L., Murillo, M.B., 2007. Understanding the Effect of the Transition Period during the Air Gasification of Dried Sewage Sludge in a Fluidized Bed Reactor. International Journal of Chemical Reactor Engineering, 5 A 1 8. https://doi.org/10.2202/1542-6580.1410

Narvaez, I., Orio, A., Aznar, M. P., Corella J ., 1996. Biomass gasification with air in an atmospheric bubbling fluidized bed. Effect of six operational variables on the quality of the produced raw gas. Industrial & Engineering Chemistry Research 35, 2110-2120 https://doi.org/10.1021/ie9507540

Padban, N., Wang, W., Ye, Z., Bjerle, I., Odenbrand, I., 2000. Tar Formation in Pressurized Fluidized Bed Air Gasification of Woody Biomass. Energy & Fuels 14, 603-611. https://doi.org/10.1021/ef990185z

Chiaramonti, D., Oasmaa, A., Solantausta, Y., 2007. Power generation using fast pyrolysis liquids from biomass. Renewable and Sustainable Energy Reviews, 11 , 1056-1086. https://doi.org/10.1016/j.rser.2005.07.008

Stammbach, M. R., Kraaz B., Hagenbucher R., Richarz, W., 1989. Pyrolysis of sewage sludge in a fluidized bed. Energy & Fuels, 3, 255-259.

Shen L, Zhang, D, K,, 2003, An experimental study of oil recovery from sewage sludge by low-temperature pyrolysis in a fluidised-bed. Fuel, 82, 465-472. https://doi.org/10.1016/S0016-2361(02)00294-6

Lu, G. Q., Low, J.eC. F., Liu, C. Y., Lua, A. C., 1995. Surface area development of sewage sludge during pyrolysis. Fuel, 74, 3, 344-348.

loannidou, 0,, Zabaniotou, A., 2007. Agricultural residues as precursors for activated carbon production-A review. Renew. Sustain. Energ. Rev. , 11, 1966-2005. https://doi.org/10.1016/j.rser.2006.03.013

Downloads

Published

2007-12-12