Moisture control in the production of aquatic feed
September 09 09:10:35, 2025
Moisture content is a critical quality parameter in pellet feed production, directly influencing the quality of the final product and the economic performance of feed enterprises. Proper moisture control is essential to ensure product safety, stability, and market competitiveness. When moisture levels exceed acceptable limits, the feed becomes prone to mold growth and spoilage, which not only affects storage but also reduces nutritional value. Conversely, if the moisture level is too low, it can lead to inefficiencies, uneven product quality, and damage to the brand's reputation. Maintaining an optimal moisture level during the production process enhances granulation efficiency, reduces energy consumption, and improves overall product quality.
Throughout the feed manufacturing process, moisture must be carefully managed. Key factors affecting moisture include the initial moisture content of raw materials, changes during grinding, liquid addition during mixing, steam quality, tempering conditions, die hole size and thickness, cooling air volume, drying time, packaging practices, and environmental conditions. Each stage requires precise control to achieve the desired moisture level.
**1. Moisture Control During Raw Material Receiving**
Accurate measurement of moisture in incoming raw materials is crucial. Sampling should follow standardized procedures to ensure representativeness. Multiple samples should be tested to minimize error, and average values used for decision-making. Special attention should be given to moisture-sensitive materials like rice bran or wheat bran. These should be stored properly, avoiding excessive humidity and long-term stockpiling. A "first in, first out" approach helps reduce inventory periods, ensuring freshness and reducing moisture loss over time.
**2. Moisture Management During Grinding**
The grinding stage significantly impacts moisture retention. Studies show that as particle size decreases, moisture loss increases. Similarly, higher moisture content in the material leads to greater water loss during grinding. Efficient operation of grinding equipment, including proper air volume adjustment, can help minimize this loss. Mechanical and pneumatic transport methods also influence moisture levels, with pneumatic systems often leading to higher losses.
**3. Moisture Control During Mixing**
Maintaining adequate moisture during mixing is essential for uniformity and texture. If the moisture level is too low, water may need to be added. However, improper water addition can lead to poor retention, mold risks, and inconsistent mixing. Using hot water, adjusting nozzle placement, and adding anti-mold agents are effective strategies. Clean mixing equipment is also important to prevent contamination and ensure even distribution.
**4. Moisture Control During Conditioning**
Conditioning is a key step where moisture and temperature are balanced. Steam pressure and conditioning time play a vital role in achieving the right moisture level. Adjusting steam pressure, conditioner speed, and blade angle can optimize moisture absorption. In dry seasons or when raw materials have low moisture, reducing steam pressure can help increase moisture content without causing blockages.
**5. Die Hole Size and Thickness**
The size and thickness of the die holes affect the final moisture content of pellets. Smaller holes allow more cooling air to pass through, increasing moisture loss. Thicker dies increase friction, reducing moisture retention. Balancing these factors ensures consistent product quality and efficient processing.
**6. Moisture Control During Cooling**
Cooling is the final stage in moisture regulation. It ensures that the product meets moisture standards while maintaining an appropriate temperature. Counterflow coolers are commonly used, and the cooling air volume and duration should be adjusted based on pellet size and moisture content. Proper cooling prevents overheating and maintains product integrity.
**7. Finished Product Management**
After cooling, the finished product must be packaged promptly. The temperature should not exceed room temperature by more than 3°C. Packaging should avoid direct sunlight to prevent moisture migration and mold growth. Proper storage conditions are essential to maintain quality and extend shelf life.
**8. Environmental Factors**
Environmental conditions, such as temperature and humidity, significantly impact moisture levels. Higher temperatures increase air’s ability to hold moisture, aiding in drying during cooling. Seasonal variations may require adjustments in processing parameters to maintain consistent quality. Understanding these influences helps producers adapt their operations effectively.
According to the national standard GB7588-2003 "Elevator Design Code",the maximum design load capacity of machine room less passenger elevators is generally 630kg, 800kg, 1000kg, 1150kg, 1350kg, 1600kg and other specifications, which are suitable for different transportation needs and scenarios. The advantages of MR elevator are larger load capacity, lower noise, and easier daily inspection and maintenance.
We can supply lifts with a maximum passenger capacity of 3-46 persons, a maximum load of 7000kg (15428Lbs), a travel of up to 120m, and a speed of up to 4.0m/s.
We are one of the world`s most proficient factories in custom design and production,
acomprehensive elevator manufacturing service provider engaging in the development, manufacturing, sales, installation, maintenance and modernization.
APSL Elevator's fully customized design and various decorations provide safe, silent, comfortable, energy-saving elevators and fast services to customers. We offer multiple lift solutions, including a wide range of passenger lifts. Learn about the dimensions, prices and safety features of our passenger lifts, the first step is to get in touch with our technical team to discuss your project inmoredetail.
Passenger Elevator,Automotive Lifts Elevator,Residential Car Lifts,Commercial Used Lifts