Regardless of the length of the cycle, the following four indicators must be met to be considered thoroughly decomposed (organic fertilizer that has not been decomposed will burn roots and attract insects):
Temperature drop: The temperature of the reactor body drops from high temperature (above 50 ℃) to near ambient temperature (± 2 ℃);
Appearance change: The color of the raw material has changed to dark brown/black, the texture is loose, and there is no obvious original fiber (such as straw becoming soft and no hard core);
Odor disappearance: no ammonia or odor, only slight earthy or humus odor;
Volume reduction: The volume of the stack is reduced by 30% to 50% compared to the initial size, and the weight is reduced by 20% to 40%.
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