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Chicken Manure Reprocessing

The test shows that the processed chicken manure can be fed to cattle, sheep, pigs, fish, etc. 

The yield and quality of milk were not affected by adding 30% dry chicken manure to the mixed concentrate of dairy cows. Adding 25%~40% to beef concentrate has good weight gain and meat quality. It can replace 20%~25% soybean cake in sheep diet and 8%~15% concentrate in pig diet. 10%~20% can be added to the diet of finishing pigs. More than 50% of fish bait can be added. There are many ways to treat chicken dung, with the purpose of dehydration, deodorization, pest control, sterilization and improving palatability.  

Drying method

  • Fast drying at high temperature. 
    Fresh chicken dung is heated in a non-stop dehydration dryer. Under the high temperature of 500~550 ℃, the water content can be reduced to less than 13% in a short time and can be used as feed.  This drying device mainly includes a heat generator, combustion chamber, drying cylinder, cyclone separator, automatic controller, etc.
  • Mechanical drying. 
    Use drying equipment for drying. Most of them are electrically controlled, and the temperature is 70 ℃, which takes 12 hours. At 140 ℃, it takes 1 hour. When the temperature is 180 ℃, it only takes 30 minutes to feed. The above methods require certain equipment conditions and are suitable for large-scale and intensive breeding farms or feed processing plants.
  • Chicken manure separator.
    Cause of physical extrusion. It can effectively dewater chicken manure. High-cost performance, dry manure can also be monetized.

Fermentation method

  • Mixed material fermentation.
    Mix chicken manure with other feeds in a certain proportion before fermentation. That is, fresh manure 35%, rice bran or straw powder 35%, chopped green fodder 30%, mix well, spray water to make the water content reach about 60%. Put it into a tank or a brick-built tank, seal it tightly with a practical plastic cloth and ferment for about 5 days. Chicken dung can be fed when it turns yellow and green and has the taste of distiller’s grains. The fermentation time in summer can be shortened accordingly.
  • Distiller’s grains fermentation.
    Add a proper amount of bran into the fresh chicken dung. Add 10% lees and 10% water. After mixing, put it into a fermentation tank or tank for fermentation for 10-20 hours, and then sterilize it with 100 ℃ steam to make feed.
  • Mechanical fermentation.
    The temperature can be adjusted as needed, and the fermentation can be completed in 3-4 hours. The fermented chicken dung is yellowish brown, loose, slightly sour and sweet, suitable for small and medium-sized chicken farms or feed plants.

Other methods

  • Silage method.
    Use 50%~65% fresh chicken manure, 25% chopped green corn straw, gramineae forage, tuber and tuber feed, and 10% bran, mix well, and control the water content at about 60% (no water in hand). Then it is put into the silage tank or cellar, and can be used as feed for cattle, sheep and pigs 30~45 days after it is firmly sealed.
  • Chemical method.
    Formalin (containing about 37% formaldehyde) is added to 0.5%~0.7% of the dry matter weight of chicken dung for treatment, and it can be covered for 1~3 hours. When feeding, 5% molasses feed and an appropriate amount of concentrate should be added to feed cattle and sheep together with forage. In addition, the chemical reagents used include sodium hydroxide, propionic acid, acetic acid, phosphoric acid and potassium dihydrogen phosphate. In order to deodorize, a proper amount of ferrous sulfate is often used to treat fresh chicken manure.
  • Expansion method.
    It is also called hot spray method, which means that fresh chicken manure is dried to less than 30% water content, and then put into a closed expansion (hot spray) equipment to heat to about 200 ℃, with a pressure of 8-15 kg per square meter. After 3~4 minutes of treatment, the chicken dung can be sprayed out quickly, and its volume can be increased by about 30% compared with the original one. The treatment effect of this method is very good, the swelling is palatable, the fragrance is rich, and the organic matter digestibility can be increased by 10%. As for the problems such as high mineral quality, low energy, high non-protein nitrogen in crude protein and some residual drugs in chicken manure, they can be solved through reasonable feed allocation.

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