餐厨垃圾和污泥联合好氧堆肥中的氮素转化及损失

发布时间：2018-06-05 23:49

  本文选题：餐厨垃圾 + 污泥　； 参考：《兰州大学学报(自然科学版)》2016年03期

【摘要】：采用强制通风静态好氧堆肥工艺,对餐厨垃圾和污泥进行联合堆肥化处理,探究二者不同配比对堆肥氮素转化及氮素损失的影响.以w(C)/w(N)=15~40的5组餐厨垃圾和污泥作为堆肥基质,以木屑作为调理剂进行堆肥试验.结果表明:所有堆体温度均先升高后降低,最高温度为78℃,w(C)/w(N)越高,堆体的最高温度越低,且达到最高温度的时间越长,pH先降低后升高至8.5趋于平缓,总有机碳质量分数不断降低.各堆体全氮和有机氮质量分数先升高后显著降低,铵态氮质量分数先增加后略有减少,硝态氮质量分数很低且变化不大.二者联合堆肥中氮损失27.8%~48.4%,且与投加的污泥含量呈正相关关系,氨挥发占氮损失的52.6%~80.4%,氨挥发是氮损失的主要途径,且随着堆体w(C)/w(N)的增加呈减少趋势.
[Abstract]:A static aerobic composting process with forced ventilation was used to treat the composting of kitchen garbage and sludge, and the effects of different composting ratios on nitrogen conversion and nitrogen loss were investigated. The composting test was carried out with five groups of kitchen waste and sludge of w(C)/w(N)=15~40 as composting substrate and sawdust as conditioning agent. The results show that the temperature of all the heaps first increases and then decreases. The higher the maximum temperature is 78 鈩，

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