Abstract
Large amounts of bones and trimmings are generated as a
by-product of the poultry industry in mechanical deboning
of chicken. These by-products are potential sources of
valuable components such as proteins and nutrients.
Enzymatic hydrolysis of animal by-products can be used to
separate lipids and produce protein hydrolyzates
resulting in the formation of insoluble sediment rich in
phosphorus and nitrogen. In this study, the sediment from
the enzymatic hydrolysis of by-product from mechanical
deboning of chicken is hydrothermally treated to evaluate
the possibility for nutrient recycling. Hydrothermal
processing was performed at elevated temperature of 150°C
and 220°C using water as the reaction medium with varying
pH and time. The elemental composition of the liquid and
solid fractions was measured after the treatments. With
higher pH, the majority of phosphorus was distributed to
the solid fraction while with pH 1 the majority of
phosphorus was found in the liquid fraction. Nitrogen was
concentrated in the liquid fraction in all processing
conditions. The major part of the carbon was distributed
to the liquid fraction.
Original language | English |
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Pages (from-to) | 1-5 |
Journal | Advances in Recycling and Waste Management |
Volume | 2 |
Issue number | 3 |
Publication status | Published - 2017 |
MoE publication type | A1 Journal article-refereed |
Keywords
- hydrothermal treatment
- poultry
- chicken
- nutrient
- phosphorus
- nitrogen