After fermentation, organic fertilizer has a high moisture content and is prone to mold. Drum fertilizer dryers must balance dehydration with the retention of beneficial bacteria and nutrients, adhering to the principles of "low temperature, uniformity, and gentle drying." The specific process is as follows:

Initially, the fermented organic fertilizer needs pretreatment to remove impurities such as stones and straw, break up large clumps, and adjust the initial humidity to avoid clogging the equipment. Then, the dryer is started, and the heating system is preheated, maintaining the temperature at 60-80℃ to prevent high temperatures from damaging organic matter and beneficial bacteria.

In the core drying stage, the pretreated organic fertilizer is fed into the drum fertilizer dryer at a uniform speed. As the drum rotates, the inner wall's lifting plates agitate the material, ensuring full contact with the hot airflow and gradual dehydration. During this process, the rotation speed, hot airflow intensity, and feed rate must be adjusted in real time to avoid localized overheating or incomplete drying.

After drying, the material is discharged and immediately cooled to prevent residual heat from damaging beneficial bacteria and to prevent the finished product from absorbing moisture. Finally, the material is screened, and substandard wet material is removed and re-dried. The qualified finished product is then ready for subsequent packaging and storage. The core of the entire process of a drum fertilizer dryer is precise temperature control and gentle drying, which not only achieves dehydration and prevents mold growth, but also retains the nutrients of organic fertilizer and the activity of beneficial bacteria to the greatest extent.