Solutions of Fish Feed Water Stability

In allusion to a variety of factors influencing fish feed pellet water stability, FANWAY Fish Feed Machinery, an expert to manufacture various fish feed machines with high quality and stable performance, provides the following countermeasures:

Some raw materials can increase the stability of fish feed in water, so the larger proportion they are in feed formula, the better stability feed will have, otherwise, the stability in water will be worse. First, for those same type raw materials, try to choose the one with stronger stability.Second, for the same raw material, its water tolerance and freshness are also different, choose the one with stronger water resistance and better freshness. Third, try to choose raw materials with animal protein under the circumstance of cost permitting because animal protein has better granulating efficiency than plant protein.

Under high temperature and high moisture conditions, starch is easy for past-forming, becoming one of the important raw materials influencing fish feed stability in water. The crude fiber content in fish feed should be controlled within 3%-5% so as to enhance water tolerance, but for the crude fiber content in herbivore fish mixed feed could be duly higher, specifically, feed for fingerling should be controlled within 8 percents and feed for adult fish should be controlled within 12 percents.

Practice indicates that the binding agent of agricultural and sideline products (like wheat gluten, rice gluten, α - starch and wheat shorts, etc.) have good cohesiveness that can produce good stability in water; attapulgite and bentonite also have better cohesiveness and a certain amount of mineral element, suitable for low price feed with low stability in water.

The product granularity largely depends on whether the grinding equipment is fitting or not, so choosing the suitable fish feed mill is quite crucial if feed producers want raw materials to achieve perfect fineness. In order to avoid bad particle size caused by improper grinding equipment, FANWAY has launched 9FQ series fish feed hammer mill with high performance in grinding production, power consumption and pulverization process, which makes particle size more guaranteed.

Lots of feed plants use steaming for tempering, that is, directly putting steaming into ready-prepared materials for hydro-thermal treatment. Therefore, it is of vital importance to control the speed of feeding well and choose the time, temperature, pressure and water content of tempering well.

Commonly, feed plants should choose suitable circular mould, adjust gap between die and rolls, and regulate cutter location according to the diverse requirements of different aquatic feeds, features of raw materials and processing craft. And some feed plants with good conditions can adopt floating fish feed pellet extruder and repetitive granulation process to improve the stability of feed in water. 

Most often, feed producers use fish feed cooler machine for cooling, and the temperature of pellet just discharged from cooler is 6-9 degree Celsius higher than indoor temperature and the water content after cooling is 12%-12.5%. In process, cooling time and air amount should be chosen depending on materials, pellets feature and fish feed cooler types, but in general, pellet temperature after cooling should never go above 3-5 degree Celsius than indoor temperature.