Stability Indexes For Municipal Solid Waste Compost
Stability Indexes For Municipal Solid Waste Compost
复制标题
城市固体废物堆肥的稳定性指标
DOI：
--
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
M. Kochba
中科院分区：
文献类型：
--
作者：
Y. Avnimelech;M. Bruner;Itai Ezrony;Roy Sela;M. Kochba
堆肥是由城市固体废物流的有机部分，使用窗口工艺制备的。稳定性是用相当简单的测试来定义的。pH开始时呈酸性，稳定在中性范围附近。电导率（EC）下降并稳定在初始读数的大约50%附近。EC的下降不是由于浸出，而是由于有机酸的分解。另一个敏感指标是NH4浓度。它从最初几百ppm的水平急剧下降到大约50 ppm的稳定值。通过对堆肥水萃取物的简单化学分析确定的稳定性点与有机物分解速率的降低有很好的相关性。
Compost was prepared from the organic fraction of the municipal solid waste stream, using a windrow process. Stability was defined using rather simple tests. The pH was acidic at the beginning and stabilized near a neutral range. Electrical conductivity (EC) dropped and stabilized near a value of approximately 50 percent of the initial reading. The drop in EC was not due to leaching but to decomposition of organic acids. Another sensitive index was NH4 concentration. It decreased sharply from initial levels of a few hundred ppm to a stable value of about 50 ppm. The stability point as determined by simple chemical analyses of the aqueous extract of the compost correlated well with the decrease of the organic matter decomposition rate.