Gruppo Ricicla - Dipartimento di Produzione Vegetale - Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy.
Bioresour Technol. 2010 Jul;101(14):5728-32. doi: 10.1016/j.biortech.2010.02.032. Epub 2010 Mar 4.
High-solids anaerobic digestion (HSAD) processes, when applied to different types of organic fractions of municipal solid waste (OFMSW), may easily be subjected to inhibition due to organic overloading. In this study, a new approach for predicting these phenomena was proposed based on the estimation of the putrescibility (oxygen consumption in 20 h biodegradation, OD(20)) of the organic mixtures undergoing the HSAD process. Different wastes exhibiting different putrescibility were subjected to lab-scale batch-HSAD. Measuring the organic loading (OL) as volatile solids (VS) was found unsuitable for predicting overload inhibition, because similar VS contents corresponded to both inhibited and successful trials. Instead, the OL calculated as OD(20) was a very good indicator of the inhibiting conditions (inhibition started for OD(20)>17-18 g O(2)kg(-1)). This new method of predicting inhibition in the HSAD process of diverse OFMSW may be useful for developing a correct approach to the technology in very different contexts.
高固体厌氧消化（HSAD）工艺应用于不同类型的城市固体废物（MSW）有机组分时，由于有机负荷过高，很容易受到抑制。本研究提出了一种新的预测方法，该方法基于对 HSAD 工艺中有机混合物腐殖化程度（20 小时好氧生物降解需氧量，OD(20)）的估算。不同腐殖化程度的废物进行了实验室规模的批量 HSAD 试验。结果表明，以挥发性固体（VS）作为有机负荷（OL）的测量方法不适合预测过载抑制，因为相似的 VS 含量对应于抑制和成功的试验。相反，以 OD(20)计算的 OL 是抑制条件的一个很好的指标（当 OD(20)>17-18 g O(2)kg(-1)时，抑制开始）。这种预测不同类型 OFMSW 中 HSAD 工艺抑制的新方法，可能有助于在非常不同的情况下开发正确的技术方法。
