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Chicken Manure Reprocessing and Benefits

Tests have shown that processed chicken manure can be fed to cattle, sheep, pigs, fish, etc.

  • Adding 30% dry chicken manure to the mixed concentrate for dairy cows will not affect milk production and quality.
  • Adding 25% to 40% to beef cattle concentrate will have good weight gain and meat quality. 
  • Adding it to sheep’s diet can replace 20% to 25% of bean cake.
  • It can replace 8% to 15% of concentrate in pig diet.
  • 10% to 20% can be added to the diet of fattening pigs.
  • It can be added to more than 50% of fish bait.

How to deal with chicken manure

There are many ways to treat chicken manure, the purpose of which is to achieve dehydration, deodorization, insecticide, sterilization and improve palatability. The main methods are as follows:

Drying method

  • High temperature and fast drying. Fresh chicken manure is heated in a continuously running dehydration dryer. At high temperatures of 500 to 550°C, the moisture content can be reduced to less than 13% in a short period, and it can be used as feed. This drying device mainly includes a heat generator, combustion chamber, drying cylinder, cyclone separator, automatic controller, etc.
  • Mechanical drying. Drying is done using drying equipment, usually with electronically controlled temperature rise. The temperature is at 70°C, which takes 12 hours. The temperature is 140℃ and it takes 1 hour. When the temperature is 180℃, it only takes 30 minutes to make feed.
  • Mechanical extrusion. Use an efficient chicken manure separator to perform the solid-liquid separation process of chicken manure. This method is the most cost-effective, green, and pollution-free.

The above methods require certain equipment conditions and are suitable for large-scale and intensive feedlots or feed processing plants.

Fermentation

  • The mixture is fermented. Chicken manure is mixed with other feeds in a certain proportion and then fermented. That is, 35% fresh manure, 35% rice bran or straw powder, and 30% chopped green feed. Spray clean water to make the water content reach about 60%, and put it into a tank or brick pool. Seal with a practical plastic sheet and ferment for about 5 days. Chicken manure can be fed when it turns yellow-green and smells like distiller’s grains. The fermentation time in summer can be shortened accordingly. 
  • Lees fermentation. Add an appropriate amount of bran to fresh chicken manure, then add 10% distiller’s grains and 10% water. Lees fermentation. Add an appropriate amount of bran to fresh chicken manure, mix well, then put it into a fermentation tank or tank for fermentation for 10 to 20 hours. Then steam sterilize it at 100℃ and then it can be used as feed. 10% lees and 10% water.
  • Mechanical fermentation. Use chicken manure regenerated feed fermentation machine. The temperature can be adjusted as needed, and fermentation can be completed in 3 to 4 hours. Fermented chicken manure is yellow-brown, loose, and has a slightly sour and sweet smell. Suitable for small and medium-sized chicken farms or feed mills.

Other methods

  • Silage method. Use 50% to 65% fresh chicken manure, 25% chopped green corn stalks, grasses, roots and tubers, and 10% bran. The moisture content is controlled at about 60% (no water can come out of the hand). Then it is put into a silage tank or cellar and can be used as feed for cattle, sheep and pigs 30 to 45 days after it is firmly sealed.
  • Chemical method. Formalin (containing about 37% formaldehyde) is added at 0.5% to 0.7% of the weight of the dry matter of chicken manure. Cover and leave for 1 to 3 hours. When feeding, you need to add 5% molasses feed and an appropriate amount of concentrate, and feed the cattle and sheep together with the forage. In addition, chemical reagents used include sodium hydroxide, propionic acid, acetic acid, phosphoric acid and potassium dihydrogen phosphate. In order to deodorize, fresh chicken manure is often treated with an appropriate amount of ferrous sulfate.
  • Puffing method. Also called the thermal spray method, fresh chicken manure is first dried to a moisture content of less than 30%, and then put into a closed expansion (thermal spray) equipment and heated to about 200°C. The pressure is 8 to 15 kilograms per square meter; after 3 to 4 minutes of processing, the chicken manure is quickly sprayed out. Its volume can be increased by about 30% compared to the original one. This method has a very good processing effect, making it fluffy, palatable, rich in flavor, and the digestibility of organic matter can be increased by 10%. As for the problems such as high mineral content, low energy, high non-protein nitrogen in crude protein and some residual drugs in chicken manure, they can be solved through reasonable feed matching.

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