Fish and shrimp feed requirements for crushing size
The particle size of the fish-fed feed recommended by the NRC (1993) fish nutrition requirement standard should be less than or equal to 0.5 mm. Generally, the pulverization requirements of the raw materials for the compound feed for fish are all passed through a 40-mesh sieve (0.425 mm sieve hole), and the 60-mesh sieve (0.250 mm sieve) has a sieve content of not more than 20%. The logarithmic geometric mean particle size of the fish feed should be below 200. China's aquatic product standards (SC2002-94) for the Chinese shrimp professional feed crushing particle size requirements are all through the 40 mesh sieve (0.425mm mesh), 60 mesh sieve (0.250mm mesh) sieve on the sieve is not more than 20%, the particle size in 200 or less. The requirements for squid and turtle feed are very fine. Generally, the larvae and juveniles require 98% of the 100 mesh sieves, and the average particle size is less than 100. The mash and the mash feeds are generally controlled by 98% of the 80 mesh sieve. The diameter is controlled below 150.
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