A Comprehensive Review on Utilization of Slaughterhouse By-Product: Current Status and Prospect

Abstract

The meat processing industry produces a huge quantity of by-products, approximately 150 million tonnes per year. The live weight of the animals is distinguished as edible, inedible, and discardable by-products, with the discardable parts equating to 66%, 52%, and 80% of the overall live weight of cattle, lamb, and pigs, respectively. Only a small percentage of those by-products are nowadays exploited for the production of high added value products such as animal feed, glue, fertilizers, etc., whereas the main management method is direct disposal to landfills. As such, the current disposal methodologies of these by-products are problematic, contributing to environmental contamination, soil degradation, air pollution, and possible health problems. Nevertheless, these by-products are rich in collagen, keratin, and minerals, being thus promising sources of high-value materials such as bioenergy, biochemical and other biomaterials that could be exploited in various industrial applications. In this paper, the possible utilization of slaughterhouse by-products for the production of various high added value materials is discussed. In this context, the various processes presented provide solutions to more sustainable management of the slaughterhouse industry, contributing to the reduction of environmental degradation via soil and water pollution, the avoidance of space depletion due to landfills, and the development of a green economy.

Formulation of Chicken Nuggets Supplemented with Mutton and Fish Livers: Insights from Antioxidant and Textural Studies

“…Meat processing plants and slaughterhouses produce nearly 150 million tons of liquid and solid byproducts every year ( Limeneh et al, 2022 ). In addition, importers, renderers, and distributors produce a significant quantity of byproducts ( Pame et al, 2023 ).…”

Morphometric traits of Black Soldier Fly larvae in slaughterhouse waste and rice bran growing medium

“…A growing medium must provide essential nutrients for the larvae while also serving as a substrate for them to thrive. Various organic waste materials, such as agricultural and food by-products, have been explored as potential growing media for BSF larvae [8][9][10]. However, the potential of slaughterhouse waste in this role remains an intriguing and largely unexplored avenue.…”

The Importance of the Slaughterhouse in Surveilling Animal and Public Health: A Systematic Review

“…Moreover, OVI is responsible for the monitorization of correct classification of by-products and its traceability at slaughterhouse. In other countries (mainly in developing countries) burial and landfilling is a common practice [ 34 ]. This practice may imply certainly risk for animal and public health specially in scavenging wildlife health and free-roaming scavengers, which in turn, has implications for human and livestock health [ 35 ].…”