Although the silkworm pupa is a high-protein, high-fat feed source, but because it contains 4% -6% of the indigestible chitin impurities, it must be processed, and with other protein feed and vitamins in order to be used as a full-price feed. The processing methods are as follows.
( 1 ) boiling cleaning method
The silkworm pupa drying sieve, remove powder, sediment, crushed with a grinder, and then according to the pupa and water mass ratio of 1 : 4 water, boil the pot for 20 minutes, skimming foam and floating oil, and then silkworm pupa powder into a cloth bag in the running water scrubbing, until there is no floating oil and foam impurities.
( 2) soda ash treatment method
First prepared 2% concentration of soda ash liquid spare. After crushing the silkworm pupa with the right amount of water soak, and then will be prepared into the lye, and add a small amount of alum, stirring, precipitation for 24 hours, skimming the upper layer of floating oil, slag; precipitate and then add the right amount of water and alum, and then stirring, standing, precipitation, when the pH value of 6 and the upper layer of water has been clear until the time to take out of the precipitation down the silkworm pupa powder can be sun-dried.
( 3 ) caustic soda treatment method
First prepared with a concentration of 1.5% caustic soda liquid spare. 5% caustic soda liquid spare, will be sun-dried or dried silkworm pupae poured into the caustic soda solution soaked for about 12 hours, and then rinsed with water, in order to degrease, deodorize and remove impurities, and then dried or sun-dried, and then crushed by the crusher that is, the finished product of silkworm pupa powder.
After feeding the proof, with silkworm pupa powder feeding livestock - the general ratio is: feeding cattle, sheep accounted for about 10% - 12% of the total feed; pigs accounted for 15%; feeding chickens, ducks, geese accounted for 5 % - 7%; feeding quail accounted for 4% - 5%; feeding fish or other aquatic animals accounted for about 2%.