筒仓式堆肥反应器不同通风量对堆肥效果的影响

发布时间：2018-10-24 07:59

【摘要】：使用筒仓式堆肥反应器,利用含水率为70%的鸡粪作为堆肥原料,分别向堆料中通入12、6和2.4 m~3·min~(-1)3种不同的通风量,研究不同的通风量对堆肥效果的影响。研究表明,合理的通风量对于堆肥的快速发酵非常重要,通风量为12 m~3·min~(-1)时堆肥效果最佳。当通风量为6 m~3·min~(-1)和2.4 m~3·min~(-1)时,堆体的全氮含量最终都有所下降,说明其通风量不能满足堆体快速发酵对氧气的需求,所以堆体内发生了部分厌氧反应。而6 m~3·min~(-1)的通风处理全磷的增加量最大,说明此处理减少了物料中磷的损失,增加了有效磷的含量。当通风量为12 m~3·min~(-1)时,与其他2个处理相比,高温期持续时间更长,有机质降解量更大,氮磷等养分的增加量更大,种子发芽率也更高,这些都说明了通风量为12 m~3·min~(-1)时堆肥效果最佳。
[Abstract]:In a silo composting reactor, chicken manure with water content of 70% was used as composting raw material, and three different ventilation rates of 12 ~ 6 and 2. 4 mg ~ (-3) min~ (-1) were added to the compost, respectively. The effect of different ventilation on composting effect was studied. The results showed that reasonable ventilation was very important to the rapid fermentation of compost, and the compost effect was the best when the ventilation rate was 12mm3 min~ (-1). When the ventilation rates were 6mm3 min~ (-1) and 2.4mm3 min~ (-1), the total nitrogen content of the reactor eventually decreased, indicating that the ventilation rate could not meet the oxygen requirement of rapid fermentation of the reactor, so partial anaerobic reaction occurred in the reactor body. The maximum increase of total phosphorus was observed in the ventilation treatment of 6 mg / 3 min~ (-1), which indicated that the treatment reduced the loss of phosphorus in the material and increased the content of available phosphorus. When the ventilation rate was 12mm3 min~ (-1), compared with the other two treatments, the duration of high temperature period was longer, the degradation of organic matter was larger, the increase of nitrogen and phosphorus was larger, and the germination rate of seeds was higher. All these indicate that the composting effect is the best when the ventilation is 12 mg / 3 min~ (-1).
【作者单位】：中国农业大学资源与环境学院;
【基金】：科技部支撑计划项目“农业废弃物高效循环利用关键技术研究”(2012BAD14B01) 生物多样性与有机农业北京市重点实验室项目
【分类号】：S141.4;X713

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