通风量对粪渣与树叶共堆肥的影响

    Effect of ventilation rate on co-composting of night soil and leaf

    • 摘要: 为实现园林废物的无害化与资源化并获得合适的通风量,以粪渣与树叶为原料,采用0.08、0.14和0.20 m3/(min·m3) 3个通风量进行了静态好氧堆肥,分析了不同通风量对堆肥过程中的堆体温度、二氧化碳浓度、发芽指数、肥效指标氮磷钾以及重金属质量分数等指标的影响。结果表明:在粪渣与树叶含水率分别为80%和8%左右,粪渣与树叶质量比例为3/1,通风量为0.078、0.14和0.20 m3/(min·m3)时,均可以实现高温好氧堆肥。通风量为0.14 m3/(min·m3)时堆肥效果较佳。所得堆肥产品肥效指标和重金属质量分数均符合国家相应标准。

       

      Abstract: Aerobic static co-composting of night soil and leaf under different ventilation rates of 0.08, 0.14 and 0.2 m3/(min·m3) was studied in pilot scale for obtaining the best ventilation rate. The indexes such as temperature, CO2 concentration, germination index, fertilizer efficiency such as nitrogen, phosphorus and potassium and contents of heavy metals were analyzed to examine the feasibility of co-composting of night soil and leaf. Results show that: when the wet basis ratio of night soil and leaf was 3/1, night soil and green waste (leaf) can realize co-composting under different ventilation rates of 0.08, 0.14 and 0.20 m3/(min·m3). And the optimal ventilation rate was 0.14 m3/(min·m3) . The fertilizer efficiency and content of heavy metals of co-composting products accord with the national standard.

       

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