不同通风方式对猪粪高温堆肥氮素和碳素变化的影响

采用单一机械翻堆、强制通风与机械翻堆相结合和单一强制通风3种通风方式,研究不同的通风方式对猪粪堆肥过程中的温度、T—N、NH4^ —N、NO3^-—N、T—C、水溶性C(DOC)和固相C／N比随时间的变化规律。结果发现,强制通风与机械翻堆相结合的方式是最佳的通风方式,它可以加快堆肥温度升高,促进NH4^ —N向NO3^-—N的转化,有利于水溶性C(DOC)的分解和固相C／N的降低,从而加快堆肥的腐熟。

Transformation of Nitrogen and Carbon During Pig Manure Composting Under Different Aeration Modes at High-Temperature

Three kinds of aeration modes, including the mechanical turning, the forced aeration combined with mechanical turning and the forced aeration were used to enhance the efficiency of composting of pig manure. The changes of temperature, T-N, -N, -N, T-C, water soluble organic carbon (DOC) and solid C/N with time during the composting process were investigated. It showed that the forced aeration combined with mechanical turning was the best one of aeration modes, because it could enhance the increase of temperature, the water soluble organic carbon (DOC) to be decomposed, the decrease of solid C/N and the transformation of -N into -N, and also could accelerate the maturity of composting.