城市污泥堆肥温度动态变化过程及层次效应

对城市污泥强制通风静态垛堆肥的温度变化规律进行了研究。结果表明，当调理剂比例较低时，堆体升温速率和降温速率都较为缓慢，堆肥处理长，堆体温度较低，当调理剂比例较高时，堆体升温速率较快，堆肥温度将在较短时间内达到灭菌稳定化所要求的高温。堆体温度在高温阶段持续的时间与调理剂比例有着密切的联系，当调理剂比例太高时，高温持续时间短，如加入适当比例的回流污泥，堆温可以在50℃以上高温阶段持续足够的时间，当堆肥原料的起始温度高于15℃，堆体一般要经历升温阶段、高温持续阶段和降温阶段，但是当堆肥原料的起始温度很低时，堆体温度还要经历一个起爆阶段。堆体内不同层次的温度有着不同的变化趋势，堆肥初始阶段，堆体下层温度高于上层温度，随后上层温度逐渐高于下层温度。

Temperature Dynamic During the Sewage Sludge Composting Process

It was well recognized that many factors influenced the composting process and the resulting product. Temperature was the most important ecological determinant within composing material. Temperature increase was a function of starting points, metabolic heat evolution and heat conservation, with the achievement of minimum temperature levels being essential to an effective composting process and contributing substantially to the high rates of decomposition achieved during processing. Few studies had been und...