鼓风对城市污泥好氧堆肥温度变化的影响

采用强制通风静态垛和温度反馈自动测控堆肥工艺，研究了鼓风过程对城市污泥好氧堆肥温度的影响。当城市污泥和调理剂比例为1：1时（体积比），处于鼓风口远端（风向远点）各个层次的堆体温度基本上不会随鼓风过程而变化，处于鼓风方向中部（风向中点）、鼓风口近端（风向近点）的堆体，其中层、上层的温度将会下降，平均下降速度分别为0.05℃/min、0.04℃/min，但是温度下降的速率在整个鼓风过程中并不均匀，温度下降速度在0－10min较快，在10－40min较慢；当混合堆料中调理剂含量较低时（3：2），堆体上层温度在鼓风过程中将会上升，上升速率约为0.022-0.05℃/min,中层温度下降，在鼓风开始阶段（0－10min），下降速率较快，约为0.12℃/min，随后变化速率较小，约为0.01℃/min。对于不同调理剂比例的堆体，处于风向远点、中点的下层温度基本不受鼓风作用的影响；处于风向近点的堆体，其下层温度会随着鼓风过程而下降，平均下降速率约为0.025-0.03℃/min。

Temperature Changes During Sewage Sludge Composting as Influenced by Aerating

It was well recognized that many factors affected the composting process and the resulting product, and temperature was the most important ecological determinant for composing material. The achievement of minimum temperature layers was important to an effective composting process and contributed substantially to the high rates of decomposition achieved during processing. As the composting began, temperature increase occurred throughout the pile and the well insulated regions of the inner zones of the pile p...