| Title | The Nutritional Value of Biowaste Bovine Slaughterhouse Meals for Monogastric Species Feeding: The Guinea Pig as an Animal Model |
|---|---|
| ID_Doc | 10079 |
| Authors | Chirinos-Peinado, D; Castro-Bedrinana, J; alvaro-Ordonez, P; Quispe-Ramos, R; Garcia-Olarte, E; Rios-Rios, E |
| Title | The Nutritional Value of Biowaste Bovine Slaughterhouse Meals for Monogastric Species Feeding: The Guinea Pig as an Animal Model |
| Year | 2024 |
| Published | Animals, 14.0, 7 |
| Abstract | Simple Summary: Every year, the consumption of beef cattle increases, as does slaughter waste, including rumen content, blood, and other waste such as ears and cheeks. These can be converted into meals through heat treatment, so it is important to know their nutritional value. In this study, tests were carried out that allowed us to determine the chemical composition, the contribution of available nutrients, and the energy content of this slaughter waste to prepare rations for guinea pigs. After the study, it was verified that flours made from ruminal content, blood, ears, and cheeks are good sources of protein and energy for guinea pigs and are consumed without problems when included as one-fifth of a barley-based diet. This circular economy approach allows this type of waste to be recovered and valued, with the advantage of reducing its polluting power due to inadequate disposal or its disposal into rivers. Biowaste from slaughterhouses can be recovered to benefit food security and reduce contamination potential. More than 3 billion heads of livestock are consumed worldwide, which will increase by 17% by 2028, generating more biowaste, increasing infectious agents, and causing economic losses due to circular economy principles not being applied. This work evaluated the nutritional quality of four types of biowaste from bovine slaughter which were transformed into a meal for guinea pigs (rumen content (RCM), ears (EaM), blood (BM), and cheeks (CM)) according to their chemical composition, digestible components, energy contribution, and voluntary consumption. For the animal model, adult male guinea pigs were arranged in metabolic cages for feces collection without urinary contamination. Nine guinea pigs were used in each digestibility test. First, a direct digestibility test was conducted using a meal of barley as a reference diet (RD), the indigestibility coefficient of which allowed for the estimation of the digestibility of biowaste meals through indirect calculations; for this, diets composed of 80% of the RD and 20% of the corresponding biowaste meals were evaluated. The difference method was suitable for determining the digestibility of beef biowaste using the indigestibility coefficients of the reference diet to calculate the digestibility of ingredients which could not be offered as 100% of the meal but were incorporated as 20%. The digestible protein and metabolizable energy contents of RCM, EaM, BM, and CM were 10.2% and 2853 kcal/kg, 44.5% and 3325 kcal/kg, 70.7% and 2583 kcal/kg, and 80.8% and 3386 kcal/kg, respectively. The CM and BM feeds had the highest contributions of digestible protein due to their higher nitrogen content, and the CM and EaM feeds had the highest ME contents due to their higher fat contents. The biowaste meal consumption in descending order was CM > RCM > EaM > BM, which were consumed without problems. These results are indicative that these components can be part of guinea pigs' diets, and it is recommended to continue studies into guinea pig growth and fattening diets with different levels of these biowaste meals. |
| https://www.mdpi.com/2076-2615/14/7/1129/pdf?version=1712545900 |
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