With the development of industry, agriculture and cities, a large number of organic wastes have been produced, and only a small amount of them have been used before. Most of them are discharged to the nature, which not only pollutes the environment, but also causes the waste of organic resources. Rabbit dung, urea in urine, atmosphere, potassium, phosphorus, etc. can be used freshly and can be absorbed and utilized by plants. However, undigested organic matter such as proteins in the feces can be absorbed after being fermented and converted into ammonium ion plants. 
 
In the bio organic fertilizer production line,it is to be equipped with different type and series fertilizer equipment to finish the production process,and these machine play the different role in the fertilizer manufacturing process.In the bio fertilizer production line,it is to be equipped with the fermentation compost turner machine to ferment the raw materials for sometime,and then it is to be equipped with the fertilizer mixer machine,fertilizer crusher machine of the relative type to deal with the raw materials.When producing the fertilizer granulator,organic fertilizer granulation machine is to be designed and equipped in the line to make bio organic fertilizer granulator.In the bio fertilizer production line,we can use the flat die granulator machine to make bio organic fertilizer granulator,and the rotary drum granulator machine also can be used in the line to finish the granulation process.

In npk fertilizer production line,we can use the rotary drum granulator machine which it is also to be equipped in organic fertilizer production line to finish the production process of the npk fertilizer granulator.The rotary drum granulator machine generally to be used by using the wet granulation method to finish the production process. However, the double roller granulator machine that it is usually to use the dry granulation method to produce the fertilizer granulator.