Steam-flaked corn processing involves the use of steam heat to expand and soften corn, followed by peeling and cracking these expanded kernels using a pair of counter-rotating rollers to produce mechanical pressure. The process essentially gelatinizes the corn starch, breaking the hydrogen bonds within the starch cells, thereby enhancing the animal's digestibility of corn starch. Additionally, the corn's protein chemical structure is altered during the process, which is beneficial for the rumen's absorption of proteins. The factors promoting gelatinization and improving overall digestibility in steam-flaked corn processing are primarily water content, heat, processing time, and mechanical action.
The role of moisture is to cause expansion and softening; heating facilitates electron movement, disrupting hydrogen bonds, and promotes gelation reactions; adequate steam conditioning time ensures a thorough gelation process; the mechanical action of the roller is a process of crushing and forming to achieve the specified tablet density, which is essentially the gelatinization of starch. This gelatinization breaks the tightly bound hydrogen bonds of starch, also altering the protein structure. Through steam thermal processing, grains expand and soften, then a pair of counter-rotating rollers applies mechanical pressure to peel and fracture the expanded corn, processing it into薄片 of the specified density. Furthermore, the chemical structure of corn protein is altered during the steam pressing process, benefiting rumen protein absorption. The primary factors in the steam pressing process of corn are moisture, heat, processing time, and mechanical action. Moisture causes the corn to expand and soften, heating facilitates electron movement, disrupting hydrogen bonds (the molecular long chains of starch), promoting gelation reactions, and adequate steam treatment time ensures a thorough gelation process. The rollers' function is to apply mechanical force to form and achieve the specified tablet density.
Advantages of Steam Flaked Corn:
Enhance gelatinization degree
2. Make starch water-soluble
3. Enhanced Digestibility and Digestive Site Control
Steam-pressed grains increase the rumen starch content, thereby achieving a starch digestion rate of over 99% throughout the entire digestive tract, nearly reaching complete digestion.
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