For poultry meal, one DTG curve (plus drying step) was
observed as a peak in the range of 200–500 C, which corresponds
to the main pyrolytic decomposition step. The maximum
decomposition rate was reached at 325 C. Similar results were
obtained in the thermal degradation of wastes rich in protein,
such as animal meat and bone meal (Chaala and Roy, 2003;
Ayllón et al., 2005) and chicken feathers (Brebu and Spiridon,
2011). The weight loss during main pyrolytic decomposition
was approximately 71% of total weight. On the other hand, the
DTG curve of poultry litter was divided into two main regions
(plus drying step and carbonates decomposition step). The first
pyrolytic decomposition region, in the range of 200–360 C,
was observed as a peak centered at 284 C. This region is attributed
to decomposition of holocellulose. The second pyrolytic
decomposition region, including two small shoulders in the
range of 360–480 C, was associated with manure (Giuntoli
et al., 2009). It was inferred that the curve related to lignin
decomposition was overlapped with the other curves between
200 and 500 C. Further decomposition of inorganics (mainly carbonates)
occurred at higher temperatures (greater than 600 C)
(Florin et al., 2009). The final residue was 32% of the total
weight.
For poultry meal, one DTG curve (plus drying step) wasobserved as a peak in the range of 200–500 C, which correspondsto the main pyrolytic decomposition step. The maximumdecomposition rate was reached at 325 C. Similar results wereobtained in the thermal degradation of wastes rich in protein,such as animal meat and bone meal (Chaala and Roy, 2003;Ayllón et al., 2005) and chicken feathers (Brebu and Spiridon,2011). The weight loss during main pyrolytic decompositionwas approximately 71% of total weight. On the other hand, theDTG curve of poultry litter was divided into two main regions(plus drying step and carbonates decomposition step). The firstpyrolytic decomposition region, in the range of 200–360 C,was observed as a peak centered at 284 C. This region is attributedto decomposition of holocellulose. The second pyrolyticdecomposition region, including two small shoulders in therange of 360–480 C, was associated with manure (Giuntoliet al., 2009). It was inferred that the curve related to lignindecomposition was overlapped with the other curves between200 and 500 C. Further decomposition of inorganics (mainly carbonates)occurred at higher temperatures (greater than 600 C)(Florin et al., 2009). The final residue was 32% of the totalweight.
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