Although silkworm chrysalis is a high-protein and high-fat feed source, it contains 4%-6% indigestible chitin impurities, which must be processed and combined with other protein feeds and vitamins before it can be used as a complete feed. The treatment method is as follows.
(1) boiling cleaning method
Sun-drying silkworm chrysalis, sieving, removing powder and sediment, pulverizing with a pulverizer, adding water according to the mass ratio of silkworm chrysalis to water 1:4, boiling in a pot for 20 minutes, skimming off foam and oil slick, then putting silkworm chrysalis powder into a cloth bag and scrubbing with tap water until there is no oil slick and foam impurities.
(2) soda solution treatment method
Prepare 2% strength soda solution for later use. Adding a proper amount of water into the crushed silkworm chrysalis to swell, then pouring the prepared alkali liquor into it, adding a small amount of alum, uniformly stirring, precipitating for 24 hours, and skimming the upper oil slick and residue; Add a proper amount of water and alum to the precipitate, then stir and let it stand for precipitation. When the pH value is 6 and the upper water is clear, take out the precipitated silkworm pupa powder and dry it in the sun.
(3) caustic soda treatment method
First, prepare a caustic soda solution with a concentration of 65,438+0.5% for later use. Soak the dried or sun-dried silkworm chrysalis in caustic soda solution for about 65,438 0.2 hours, and then take it out. Then was with clear water, degrease, deodorizing, removing impurities, oven dry or oven drying, and pulverizing with a pulverizer to obtain finished silkworm pupa powder.
It has been proved that the general proportion of silkworm chrysalis powder feeding livestock is: feeding cattle and sheep accounts for about10%-12% of the total feed; Feeding pigs accounts for15%; Raising chickens, ducks and geese accounts for 5%-7%; Quails account for 4%-5%; Raising fish or other aquatic animals accounts for about 2%.