Low-temperature Wet Rendering Technology for Complete Meat and Bone Meal Production Lines

Low-temperature Wet Rendering is a recycling technology for processing animal by-products.The process operates below 100°C under slightly positive pressure within a specific range. Saturated steam serves as the heat transfer medium;materials are treated by direct steam injection or indirect heating combined with mechanical separation.Centered on low-temperature wet hydrolysis, the process effectively separates fat from protein and bone fractions in raw materials,enabling the co-production of high-quality fat and low-fat bone residue meal.

Compared with the traditional high-temperature and high-pressure wet rendering process,the low-temperature wet rendering method features a significantly lower processing temperature.It greatly reduces thermal damage to materials and better preserves the nutritional value and functional properties of proteins.

The core advantage of low-temperature wet rendering for meat and bone meal production lies in the processing philosophy of low temperature, short residence time and continuous operation.The system precisely regulates temperature, pressure and material residence time. On the premise of meeting sterilization standards,it maximizes nutrient retention of finished products, improves fat quality and cuts energy consumption.The popularization of this technology requires mature automated control systems and standardized operation & maintenance systems.Establishing differentiated process parameter databases for different raw material characteristics is critical to stabilizing product quality.

I. Applicable production lines for Low-temperature Wet Rendering

Production lines for resource utilization of slaughter by-products: processing bones, internal organs, lymph and other by-products generated from poultry slaughter;

Livestock and poultry harmless treatment centers: disposing carcasses of pigs, chickens, ducks, cattle and other livestock and poultry;

Auxiliary production lines for meat processing enterprises: treating meat scraps, expired meat products, etc.;

Production lines for food-grade / pet food-grade meat and bone meal: processing scenarios with high requirements for finished product quality.

The process can be configured as a continuous production line equipped with a PLC automatic control system to realize real-time monitoring and automatic adjustment of temperature, pressure and flow rate.

Product Specifications & Quality Indicators

• Meat and bone meal: Protein retention rate ≥85%; fat content can be reduced to below 7% with supplementary fat removal process.

• Animal fat: Purity can reach over 98%, featuring low free fatty acid (FFA) content, low peroxide value and excellent color.

Products manufactured via low-temperature processing suffer minimal thermal damage, with nearly unchanged amino acid profiles.This technology is particularly suitable for pet food and edible protein processing sectors.

Chengzhu focuses on the resource utilization and harmless treatment of livestock and poultry by-products.Supported by mature low-temperature wet rendering technology and intelligent complete equipment, we provide customized solutions.With reliable technology and comprehensive services, we help customers achieve energy-efficient, ·high-quality resource production.