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Optimization of Feed Physical Performance during the Pelleting Process


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Optimization of Feed Physical Performance during the Pelleting Process

Question:

 

Dear Fenanza Team,

 

we are from the shrimp feed mill in West Java, a division of production. We are facing some problems in the process of making shrimp feed, the feed ingredients often jump or slip (stagnant) in the pellet machine, as a consequence the process becomes slow (low capacity), the materials are hard to come out from the die and after leaving the die the feed water content is very low, so the feed density becomes low. Low feed density results in floating feed (our shrimp feed tends to float). In the field, floating feed is generally unacceptable so this is a serious issue. When jump or slip occurs, we add some oil as lubricants but the feed becomes fragile and easily shed in the water. Are there any effective solutions that we can implement in dealing with it? Thank you.

 

(Bapak Arif – West Java)

 

Answer:

 

Dear Bapak Arif,

 

Thank you for your questions. As we know, the continuity of the feed pelleting process is really affecting the results of feed performance. Among them are moisture control in the feed (the feed not too dry), optimum pellet density so it may sink easily, compact feed texture so it does not easily shed in the water, also good water stability.

 

There are some causes that can be the factors of the delay of pelleting process; (1) the use of raw materials that contain high fiber, (2) lack of materials that contain lubricants, (3) the use of pellet binder that can harden the pellet, (4) lack of using starch sources causing poor gelatinization process, (5) inaccurate setting of the roller compression and die.

 

The addition of starch sources as the main ingredient for the gelatinization process is very important. In addition, good gelatinization requires the use of saturated steam with a temperature control around 90° C and sufficient heating time retention for gelatinization (system conditioner). If the gelatinization process is not optimal and lack of lubrication, the ingredients are not dull or fluffier, as a result, the ingredient rotates on the roller for a long time and difficult to get out of the die, so the materials have a longer contact with the hot temperatures. When the feed comes out of the die releases moisture and heat energy spontaneously in response to pressure adjustments with the environment, this is causing the feed to become very dry. Addition of oil as a lubricant is indeed one of the usual ways to facilitate lubrication of pelleting, but the excess of oil additions can reduce the friction between rollers - materials - and die, as a result the pressure decreases and the feed texture becomes fragile which can result in low feed density. This low feed density causes the feed to float in water.

 

Fenanza as a distributor for natural pelleting binder producer, Borregaard Norway, gives effective solutions and provides the natural lubricant from softwood extract, PELLTECH. It is designed with a special formula so not only as a lubricant but also maintains the quality and durability of the pellet that can increase feed water stability (WS).

 

PELLTECH is mainly used for feed that contains high fiber materials that are difficult to pass through the die. PELLTECH is functioned to smoothen the ingredients that come out from die increasing the productivity and decreasing the exposure of hot temperature. PELLTECH as a protector agent that minimizes the decrease of feed nutrition such as amino acid, fatty acid, and vitamin. The addition of PELLTECH also can increase the density of the material that comes out from the die so the density becomes higher and the feed easily sinks. The use of PELLTECH for a long term can increase the lifetime of the die and roller because of the lubrication effect. It easily mixes with the feed because PELLTECH is in a powder. The recommended dosage is 2.5 – 10 kg / tons depending on the raw material. For more technical information about PELLTECH feel free to contact our team. Regards. (D)

 

 

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