Waste products from the poultry industry: a source of high‐value dietary supplements

Abstract

BACKGROUND The production and consumption of chicken has doubled in the last 17 years. Since slaughter yields range from 70 to 80%, during production various chicken waste residues are generated. One of these residues is waste created after the mechanical separation of chicken meat (W‐MSM). The goal of the circular economy is to manage this waste and transform it into a valuable product. RESULTS W‐MSM was subjected to hydrolysis by the proteolytic enzymes pepsin and papain to obtain bioactive compounds. Papain digestion resulted in several times higher yields of chondroitin sulfate (CS), hyaluronic acid (HA), peptides and amino acids in comparison with pepsin. The hydrolysis conditions were further optimized using the software Design Expert to evaluate the impact of added enzyme, buffer and duration of the hydrolysis. In addition, the scale‐up of this process was verified with 5 kg of W‐MSM and the obtained product contained approximately 77% (w/w) of peptides, 9% (w/w) of CS, 7% (w/w) of HA and 4% (w/w) of amino acids. CONCLUSIONS We tested and optimized the method for evaluating the direct waste from poultry processing and transformed it into a product containing bioactive compounds which can be utilized as an ingredient for improving the properties of feed. © 2019 Society of Chemical Industry

Environmental aspects and economic evaluation of new green hydrolysis method for waste feather processing

“…The results of protein and peptide analyses (Stiborova et al 2020) of the pilot and operational hydrolysates showed that a significantly higher amount was found in the hydrolysate prepared in the operational reactor, namely 36.9 g/L as distinct from 23.3 g/L in the pilot hydrolysate; see Table 2. Probably, an essential role was played by the reaction time; 16 h compared to 5 h.…”

“…The composition of the hydrolysate (Stiborova et al 2020), such as the proportion of the individual amino acids, the amount of peptides and proteins, the elemental composition belongs to the most important characteristics of the hydrolysate. Proportions of the individual amino acids for laboratory, pilot and operational reactors are shown in Fig.…”

Environmental Aspects and Economic Evaluation of New Green Hydrolysis Method For Waste Feather Processing

“…The results of protein and peptide analyses (Stiborova et al 2020) of the pilot and operational hydrolysates showed that a signi cantly higher amount was found in the hydrolysate prepared in the operational reactor, namely 36.9 g/L as distinct from 23.3 g/L in the pilot hydrolysate; see Table 2.…”

“…The composition of the hydrolysate (Stiborova et al 2020), such as the proportion of the individual amino acids, the amount of peptides and proteins, the elemental composition, etc., belongs to the most important characteristics of the hydrolysate.…”

In Focus: 7th European Bioremediation Conference (EBCVII)

“…In the same line, Stiborova et al evaluated the waste products from poultry industry as possible source of high-value dietary supplements. 11 These particular materials through hydrolysis with papain and further processing can generate final products with bioactive ingredients like hyaluronic acid (HA), chondroitin sulfate (CS), peptides and amino acids. This process is a representative transformation of by-product emphasizing on the value of circular economy.…”