Aquatic mixed feed can generally be divided into pellet feed and extruded feed, so as for crayfish feed (pellet crayfish feed and extruded crayfish feed). Then what’s the difference between pellet feed and extruded feed?
Difference in Feed Making Process
First of all, let's look at the their differences in the feed manufacturing process. (How to make cattle feed pellets? )
Fish Feed Pellet Making Process
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The processing flow of making pelleted fish feed generally includes crushing, mixing, pelletizing and cooling. The pellet size is decided by the diameter of pellet die. You can make fish feed pellets with different sizes by changing the pellet die.
Two Tips for Fish Feed Processing
- The performance of the crusher will determine the grinding fineness of raw fodder materials.
- The temperature of the crushed feed in conditioner is about 80-90 degrees. At this temperature, the feed powder can reach the semi-curing stage, so that the final produced fish feed pellets are also in semi-curing stage. Here is a 40TPH complete Fish Feed Production Factory for your reference when you make your own business plan of establishing a commerical pellet fish feed plant.
Extruded Fish Feed Making Process
- The fineness of fodder material after crushing is finer than that of pellet feed.
- The temperature of feed extruding chamber in fish feed extrusion machine can reach up to 110-200 degrees. Extruded fish feed is produced under high temperature and high pressure, through the process of mixing, tempering, heating, curing, extruding, discharging.
- The water content of extruded or expanded fish feed is much lower than that of pelletized feed. Due to the water lost in the process of high temperature and high pressure, 1.1 tons of raw feed materials can only made about 1 ton of extruded feed products.
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Difference in Property under Water
For granulated or pelleted feed, to ensure the stability under water, it is necessary to add a lot of adhesives such as high-gluten flour or other animal absorbable adhesives. While not needed for extruded feed pellets. Since extruded feed is cured, it can transform into swelling state like a sponge in the water.
Other Differences Between Compressed Feed Pelles and Expanded Feed
- Difference in Dust Content: Pelletized feed has more dusk content than extruded feed.
- Difference in Feed Processing Cost: The production cost of extruded (expanded) feed is 1-1.5 times that of pellet feed.
- Difference in Nutrition Absorption for aquatic animal: The extruded fish feed is produced under high temperature and pressure which can eliminate the bacteria and improve the feed taste, so extruded feed is better than pelleted feed in nutrition absorption for fish and other aquatic animals.
- Difference in Price of Feed Processing Machine: The price of extruded feed making machine is generally higher than normal feed pellet machine. Therefore, feed extruder machine is usually used to make high-grade fish feed.
Company Information
Website: https://www.abcmach.com
Email: info@abcmach.com
