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城市污泥与稻草堆肥的腐熟度指标研究

Keywords: 污泥,稻草,堆肥,腐熟度指标

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Abstract:

采用翻堆方式将稻草与未消化城市污泥进行堆肥,测定常见几种化学和生物参数的变化,探讨其作为腐熟度指标的可行性。结果表明,(C/N)终点/(C/N)起始比值和铵态氮可作为堆肥腐熟度的指标,当(C/N)终点/(C/N)起始小于0.6和铵态氮浓度低于400mg·kg-1时,堆肥基本腐熟。水溶性有机碳与水溶性铵态氮之比值也可作为堆肥腐熟度的新的复合指标,当比值大于9时,堆肥基本腐熟。挥发性固体重、C/N、pH及NO3--N与堆肥原料有关,只可作为参考。

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