不同填充料污泥好氧堆肥的性质变化及腐熟度

对脱水污泥与4种填充料进行了好氧堆肥试验,温度、含水率、有机质、pH和电导率等参数的监测表明堆肥过程能顺利进行.通过研究化学指标水溶性有机碳、NO^-₃-N、NH⁺₄-N及生物学指标Cress发芽指数CI(Germina-tion Index)随时间的变化规律,发现NH⁺₄-N是影响生物学参数Cress发芽结果的重要因素,其含量变化与GI间具有较好的相关关系.本文提出NH⁺₄-N作为本堆肥工艺的腐熟度评价指标,腐熟堆肥的NH⁺₄-N含量范围为0.5～1.4mg/g,其变化与初始堆料有关.

The Character Changes and Maturity of Sewage Sludge Aerobic Co-composting with Various Bulking Agents

In Aerobic co-composting of four bulking agents and de-watered sewage sludge, the records of temperature, moisture, organic matter, pH and conductivity with time showed the composting could be successfully processed. The changes of chemical parameters, water soluble organic carbon, nitrate, ammonium and biological parameter Cress Germination Index(GI) with time during the composting process were investigated. Ammonium concentration was found to be an important chemical factor affecting Cress Germination Index and had significant negative correlation with GI which could be used as a good index of compost maturity in this study. The value of ammonium which changed with the initial components in composting would be 0.5-1.4 mg/g at the end of the processes in all composts.