Enhancement of thermophilic anaerobic sludge digestion by 70° pre-treatment: Energy considerations

I. Ferrer, E. Serrano, S. Ponsá, F. Vázquez, X. Font

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31 Citations (Scopus)

Abstract

The objective of this work was to investigate the effect of a low temperature pre-treatment (70°C) on the thermophilic anaerobic digestion of sewage sludge. Experimental results were used for the calculation of theoretical energy balances of full-scale digesterswith and without pre-treatment step. The 70°C sludge pre-treatment increased sludge solubilization by 10 times and enhanced volatile fatty acids generation. Biogas production increased up to 30-40% and methane content in biogas from 64 to 68-70%. Theoretical calculations showed that additional surplus energy production would be expected by incorporating a 70°C pre-treatment step to a thermophilic reactor. © 2009 DEStech Publications, Inc.
Original languageEnglish
Pages (from-to)11-18
JournalJournal of Residuals Science and Technology
Volume6
Issue number1
Publication statusPublished - 1 Jan 2009

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