| 摘要 |
PROBLEM TO BE SOLVED: To provide a method which dries, carbonizes or ashes an organic sludge containing a nitrogen group of atom to obtain a nitrogen-rich soil nutrient material (such as a fertilizer and a soil conditioner). SOLUTION: The method comprises adding a flocculating agent in an organic sludge to lower the water content, followed by heating indirectly for drying, carbonizing or ashing to convert to a soil nutrient material, wherein the flocculating agent contains no iron component. |
