Abstract

The behaviors of bioactive compounds treating gaseous pollutants in biofilters and in the compost used as soil amendment and in green roof buildings are controlled by their thermal properties. There is a lack of information on thermal conductivity of olive cake compost (OCC), K as affected by water content and bulk density. Thermal conductivities (K) of 40 samples of (OCC) were determined experimentally at bulk densities (400–950 kg/m³) and moisture contents (10%–90%) using a single thermal probe method. The results showed that thermal conductivity increased linearly as water content, and bulk density increased and with a decrease in air filled porosity. Simple linear relationships were developed between compost thermal conductivity and dry bulk density and the degree of saturation. The experimental values were close to those reported recently for leaf compost and green roof soils. The compost at water content of 90% showed the highest thermal conductivity (K) of 0.60 W/m.k, which indicate that compost, can be used as good cheep insulator in geothermal heat storage application and as an additional echo-friendly insulation layer in green roof building which might be considered as a good means of passive energy saving there.

摘要

生物活性化合物在生物过滤器、用作土壤改良剂的堆肥以及绿色屋顶建筑中处理气态污染物的行为是由其热性能控制的。缺乏关于橄榄饼堆肥 (OCC) 导热系数、K受水含量和堆积密度影响的信息。40 个 (OCC) 样品的热导率 ( K ) 在体积密度 (400–950 kg/m ³）和水分含量（10%–90%），使用单热探针方法。结果表明，导热系数随着含水量的增加而线性增加，堆积密度增加，并且随着充气孔隙率的减少。堆肥热导率与干容重和饱和度之间存在简单的线性关系。实验值接近最近报道的树叶堆肥和绿色屋顶土壤的值。含水量为 90% 的堆肥显示出最高的导热系数 (K)，为 0.60 W/mk，这表明堆肥可作为地热储热应用中良好的廉价绝缘体，并可作为绿色环境中附加的回声友好绝缘层。屋顶建筑可能被认为是那里被动节能的一个很好的手段。