Orzi V, Cadena E, D'Imporzano G, Artola A, Davoli E, Crivelli M, Adani F
RICICLA Group - Dipartimento di Produzione Vegetale, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy.
Bioresour Technol. 2010 Oct;101(19):7330-7337. doi: 10.1016/j.biortech.2010.04.098. Epub 2010 May 23.
The aim of the present study is to investigate the correlation between microbial activity, i.e., biological stability measured by aerobic (OD(20) test) and anaerobic tests (ABP test), and odour emissions of organic fraction of municipal solid waste during anaerobic digestion in a full-scale treatment plant considering the three stages of the process (input, digested and post-digested waste). The results obtained indicated that the stabilization of the treated material reduces the odour impact measured by the olfactometric approach. Successive application of gas chromatography mass spectrometry (GC-MS) and electronic nose (EN) allowed the characterization of the different groups of volatile organic compounds (VOCs) responsible of odour impacts determining, also, their concentration. Principal component and partial least squares analyses applied to the EN and GC-MS data sets gave good regression for the OD(20) vs the EN and OD(20) vs the GC-MS data. Therefore, OD(20) reduction could be used as an odour depletion indicator.
本研究的目的是在全尺寸处理厂中，考虑厌氧消化过程的三个阶段（进料、消化后和消化后废弃物），研究微生物活性（即通过好氧（OD(20) 测试）和厌氧测试（ABP 测试）测量的生物稳定性）与城市固体废物有机部分厌氧消化过程中的气味排放之间的相关性。所获得的结果表明，经处理材料的稳定化降低了通过嗅觉测定法测量的气味影响。气相色谱 - 质谱联用仪（GC-MS）和电子鼻（EN）的连续应用使得能够表征造成气味影响的不同挥发性有机化合物（VOCs）组，同时还能确定它们的浓度。应用于 EN 和 GC-MS 数据集的主成分分析和偏最小二乘法分析，对于 OD(20) 与 EN 以及 OD(20) 与 GC-MS 数据给出了良好的回归。因此，OD(20) 的降低可以用作气味消除指标。
