What are the shortcomings of the Twin Screw Fish Feed Pellets Extruder?

High-temperature processing leads to a significant loss of heat-sensitive nutrients. To achieve thorough plasticization and sterilization of raw materials, the temperature of the plasticizing section in a twin-screw fish pellet making machine is typically controlled at 110-130℃. Even if the forming section temperature is reduced to 90-100℃, the overall processing temperature remains high. Heat-sensitive components such as probiotics, vitamin C, and vitamin E are largely inactivated or decomposed above 80℃. Experimental data shows that when processing feed containing vitamin C using a twin-screw extruder, the vitamin C retention rate is only 30%-40%; when processing feed containing probiotics, the probiotic survival rate is typically below 20%. This makes it difficult for twin-screw extruders to meet the nutritional requirements of functional feeds that need to retain heat-sensitive components. While single-screw extruders have lower plasticizing efficiency, they can reduce the loss of heat-sensitive components by lowering the processing temperature, making them more advantageous in the production of such feeds.

 

Low-temperature processing has limited adjustment space and is less effective. To reduce the loss of heat-sensitive components, some companies have attempted to lower the processing temperature of Twin screw fish feed pellet extruders. However, lower temperatures lead to insufficient plasticization of the raw materials, reducing starch gelatinization from over 90% to below 70%. This results in loose feed pellets with poor water resistance, easily disintegrating in water, and consequently reducing fish digestibility. Furthermore, low-temperature processing also affects the sterilization effect, decreasing the sterilization rate from 99% to below 80%, increasing the risk of intestinal diseases in fish. Some companies use a "post-coating" technique, spraying heat-sensitive components onto the pellet surface after processing. However, this method leads to uneven component distribution and easy detachment during storage and transportation, resulting in less than ideal performance.

 

Insufficient capacity to process special heat-sensitive raw materials. Besides common vitamins and probiotics, some special functional raw materials, such as plant extracts and enzyme preparations, are also temperature-sensitive. The high-temperature processing environment of Twin screw floating fish food extruders can destroy their activity and cause them to lose their functionality. A feed mill producing grass carp digestive aid feed containing enzymes experienced a 70% loss of enzyme activity after processing with a twin-screw extruder, significantly reducing the feed's digestive benefits. Switching to a single-screw cryogenic extrusion process resulted in an 85% retention rate of enzyme activity, leading to a substantial improvement in feed efficacy.

 

While some high-end twin-screw floating fish feed extruders are equipped with cryogenic extrusion modules, these devices increase prices by 30%-50%, and cryogenic processing reduces capacity by 20%-30%, further increasing costs and production pressure for companies and hindering widespread adoption.

 

 

 

MIKIM's fish feed pellet production lines and supporting machinery offer excellent value for money. Not only are they affordable, eliminating middlemen markups and allowing small and medium-sized enterprises (SMEs) and fish farmers to purchase complete sets of equipment at reasonable costs, but they also boast exceptional efficiency. The fully automated process, from raw material crushing and precise ingredient mixing to extrusion pelleting and maturation, is completed in one continuous flow. This results in high starch gelatinization rates and uniform pellet formation, significantly improving production efficiency and feed quality, truly achieving "low cost, high output." Choosing a MIKIM fish feed pellet production line means enjoying comprehensive pre-sales and after-sales service, including 24-hour online customer support, a one-year warranty on the entire machine, professional on-site installation, commissioning, and maintenance, and a stable supply of spare parts. Customers can buy with confidence and use with peace of mind, with both excellent value and service quality!

 

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1. What is the price of the animal feed pellet extruder?

The price ranges from approximately $3,500-$55,000

2. Do you provide maintenance services for your customers?
Yes, we offer comprehensive after-sales maintenance services to our customers.

 

If you would like to learn more about MIKIM machinery, please contact us. We offer one-stop service and welcome your inquiries!!!

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