Ruggieri Luz, Gea Teresa, Artola Adriana, Sánchez Antoni
Composting Research Group, Department of Chemical Engineering, Escola Tècnica Superior d'Enginyeria, Universitat Autònoma de Barcelona, Campus Bellaterra, Cerdanyola, Barcelona, Spain.
Bioresour Technol. 2009 May;100(10):2655-66. doi: 10.1016/j.biortech.2008.12.049. Epub 2009 Jan 31.
Air filled porosity (AFP) appears as the best measure to determine the available porosity in a composting material or, in general, in an organic matrix. Several methodologies, including theoretical and empirical approaches have been developed to estimate AFP. Among them, air pycnometry has been considered the most suitable and accurate technique to obtain reliable measures of AFP. In this review, the published methodologies to determine AFP by air pycnometry are explained in detail, and the main advantages and disadvantages of such methodologies are discussed. Also, a massive sampling of several organic wastes and mixtures intended for composting has been characterized by air pycnometry, and the theoretical and empirical correlations proposed in literature are compared in terms of accuracy in AFP measurement. Results obtained show that some theoretical correlations are suitable for estimating AFP in the majority of organic wastes studied. However, some waste samples need an experimental determination to obtain a realistic value of AFP.
充气孔隙率（AFP）似乎是确定堆肥材料或一般有机基质中有效孔隙率的最佳指标。已经开发了几种方法，包括理论和经验方法来估算AFP。其中，气体比重瓶法被认为是获得可靠AFP测量值的最合适和准确的技术。在这篇综述中，详细解释了通过气体比重瓶法测定AFP的已发表方法，并讨论了这些方法的主要优缺点。此外，通过气体比重瓶法对几种用于堆肥的有机废物和混合物进行了大量采样，并在AFP测量的准确性方面比较了文献中提出的理论和经验相关性。所得结果表明，一些理论相关性适用于估算大多数研究的有机废物中的AFP。然而，一些废物样品需要进行实验测定以获得AFP的实际值。
