| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing a granular fertilizer, by which a granular fertilizer having a high hardness is directly produced from combustion ash of chicken droppings by a simple process. <P>SOLUTION: The method for producing a granular fertilizer includes adding a mineral acid to a mixture containing the combustion ash of chicken droppings and urea, wherein the mass ratio of the urea to the combustion ash of chicken droppings (urea/combustion ash of chicken droppings) is within the range of 0.02-0.2, and then granulating the resulting mixture by a method of growing nuclear particles. <P>COPYRIGHT: (C)2012,JPO&INPIT |
