Extrusion Expansion——Changes of Nutrient Components in Materials During Extrusion Expansion
This text systematically introduces the changes of different nutrients in feed during the extrusion expansion processing, including carbohydrates (starch, fiber, hydrophilic colloids, and sugar), protein, fat, vitamins, minerals, as well as the effect on anti-nutritional factors: carbohydrates undergo specific changes like starch gelatinization, with different categories showing varied impacts on extrusion effects and feed properties; protein produces denaturation, thermal denaturation, enzyme inactivation, and decreased dispersibility, which improves protein digestibility while causing certain losses of amino acids through Maillard reaction; part of fat forms complexes with starch and protein, which reduces free fat content, slows down fat oxidation in storage without affecting digestibility; heat-sensitive vitamins suffer different degrees of loss that can be reduced by stabilisation treatments, while extrusion generally does not destroy minerals but affects their bioavailability; the biggest advantage of extrusion expansion processing is that it can effectively destroy most anti-nutritional factors in feed raw materials, such as trypsin inhibitors, free gossypol and glucosinolates, and processing parameters determine the destruction effect, with twin-screw extrusion achieving the best inactivation effect on anti-nutritional factors.
2026-09-04
How to Systematically Identify Potential “Nodes” for Root Cause Analysis When Facing Market Complaints About Excessive Pellet Powder?
To systematically address market complaints regarding excessive pellet powder, a process analysis is essential, focusing on ten key nodes: the pellet mill observation port, pellet mill discharge port, rotary grading screen inlet, finished product bin inlet, pelleting floor screen inlet, packing port, palletizing area, loading area, customer storage area, and animal feeding end feed trough. By observing these specific points, operators can diagnose root causes ranging from upstream issues like pulverization particle size, mixing uniformity, and steam conditioning to downstream factors such as equipment wear, screening capacity, buffer settings, and handling procedures. This comprehensive inspection allows for the identification of interactions between variables—such as improper die compression, cooling inefficiencies, or physical impact during transport—enabling targeted adjustments to equipment parameters, operational workflows, and maintenance schedules to effectively reduce powder generation throughout the entire production and supply chain.
2026-08-25
Extrusion — Factors Influencing the Processing Effects of Extrusion
The quality and efficiency of extrusion processing are primarily determined by feed raw materials and production process parameters. Key raw material factors include controlling moisture content (15%–27%) to balance energy consumption and product shape, utilizing starch composition and content for expansion and binding, managing fat levels (preferably below 8%) to maintain stability, and optimizing crude protein content to influence texture and equipment wear. Simultaneously, critical production parameters involve selecting appropriate grinding particle sizes to enhance digestibility and gelatinization, maintaining precise extrusion temperatures (ideally 140–160℃) to ensure proper cooking, regulating steam addition based on starch content, and controlling conditioning time to achieve sufficient material binding and cooking degrees.
2026-08-25
Extrusion — Post-conditioning and Drying/Cooling Technologies of Extrusion
In the production process of expanded feed, good steam conditioning is essential to achieve the required temperature and moisture content, followed by post-conditioning to enhance hardness and gelatinization. Expanded products are initially subjected to high-temperature hot air (150–190°C) to reduce moisture without damaging nutrients, after which the temperature is lowered to prevent the Maillard reaction. The drying and cooling process, often integrated into a single unit, utilizes equipment such as horizontal dryers with conveyor belts or vertical dryers operating on counter-flow principles to ensure proper moisture removal and temperature reduction. To prevent quality deterioration caused by moisture migration, products must be effectively cooled before packaging, while operational best practices include controlling material thickness, ensuring uniform airflow, and adjusting residence times to suit specific product characteristics.
2026-08-25
Comprehensive Analysis of the Feed Pelleting Process
Feed pelleting is a systematic engineering process from feeding to cooling, where final product quality depends on the precise control of three key parameters—temperature, moisture, and hardness—throughout the entire workflow. The article emphasizes that achieving high-quality pellets requires a combination of stable feeding, wet-heat treatment in conditioners and holding bins tailored to specific raw material characteristics, and precise shaping via ring die extrusion and cooling. Ultimately, only by establishing a triangular balance and synergy among the formula (40%), raw material properties (30%), and process equipment (30%) can the industry consistently produce high-quality, structurally dense, and nutritionally uniform feed.
2026-08-24
Research on Processing Technology of Small Particle Fish Sprout Material (<0.3 mm)
The production of formulated fish larval feed below 0.3 mm requires a systematic approach that transcends simple size reduction, demanding high precision in raw material grinding, thermal processing, and post-treatment to ensure water stability and nutrient retention. Among the available technologies, low-temperature cold extrusion/spherization offers superior comprehensive performance for high-value species, while intermediate expansion-micronization provides better engineering adaptability for existing facilities, and wet agglomeration or spray drying are best suited for functional delivery and early-stage feeding. Successful engineering development relies on optimizing critical parameters—such as 200-mesh grinding capacity, continuous process integration, and strict particle size classification—while establishing a validation loop that connects processing metrics with aquaculture outcomes like survival and growth rates to ensure commercial viability.
2026-08-21
Global Pet Food Enterprise Latest Sales Scale Ranking! The First Place Sold $29.5 Billion
In 2024, global pet food enterprise sales rankings saw Mars Pet Care lead with $29.5 billion, while a major competitor experienced a decline in revenue and ranking. Chinese companies Wanpy and Gembaby ranked around twentieth with revenues not exceeding $1.01 billion. Despite their current position, China's leading pet food companies are expected to maintain significant growth momentum driven by the massive domestic market and export capabilities, with a strong outlook to eventually break into the global top five.
2026-08-18
Extrusion Post Operating Procedures
This document outlines the standard operating procedures for the extrusion post, detailing the responsibilities of operators and specific protocols for equipment startup, shutdown, and maintenance. It emphasizes the importance of pre-startup checks on circuits, steam, water, and mechanical components, followed by a strict startup sequence involving preheating, material conditioning, and careful monitoring of parameters such as temperature, current, and feeding rates to ensure product quality. The procedures also cover troubleshooting common issues like particle deformation and low yield, guidelines for safe equipment cleaning, maintaining on-site hygiene, and the accurate completion of operation records, all aimed at ensuring safe, efficient, and standardized extrusion production.
2026-08-17
How to Establish a Standardized Production Management System in a Feed Mill?
The core of establishing a standardized production management system for a feed mill lies in shifting from experience-based to standard-based operations. By locking process parameters at each stage, setting up key inspection points, implementing scheduled patrols, establishing a closed-loop mechanism for problem rectification, and perfecting record management, the system eliminates arbitrariness and chaos in production. This effectively reduces rework rates and losses, thereby ensuring consistent quality and clear accountability.
2026-08-07
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