Waste to energy valorization of poultry litter by slow pyrolysis

Mahsa Baniasadi, Alessandro Tugnoli (Editor), Roberto Conti (Guest editor), Cristian Torri (Guest editor), Daniele Fabbri (Editor), Valerio Cozzani (Editor)

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The slow pyrolysis process of poultry litter was investigated using different experimental and analytical techniques. A fixed bed reactor was used for the simulation of the slow pyrolysis process up to a constant temperature (400–800 °C) under nitrogen flow. Yields of the different product fractions were determined. On-line FTIR techniques were used to detect the most significant compounds in the evolved gas (carbon dioxide, carbon monoxide and methane). GC–MS results allowed the identification of the more important categories of compounds in the liquid condensate (phenols, fatty acids, sterols, N-containing compounds). The fate of nitrogen and sulphur, present in relevant amounts in the original substrate, was investigated: sulphur remains mostly in char at any investigated temperature, while nitrogen is split among the different products, slightly increasing its transfer to the gas phase only at higher pyrolysis temperatures. The energy transfer from the original biomass substrate to the different product fractions was also investigated. The fraction of biomass energy transferred to non-condensable gases raises with pyrolysis temperature and was estimated to be able to thermally sustain the process at 550 °C. The results obtained shed some light on the potential use of the slow pyrolysis process for sanitation and waste-to-energy valorization of poultry litter.
Original languageEnglish
Pages (from-to)458-468
Number of pages11
JournalRenewable Energy
Volume90
Early online date17 Jan 2016
DOIs
Publication statusPublished - May 2016
Externally publishedYes

Keywords

  • Poultry litter Slow pyrolysis Waste Element fate analysis Biofuel

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