Composting Research Group, Department of Chemical Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08913 Bellaterra, Barcelona, Spain.
Waste Manag. 2010 Mar;30(3):441-5. doi: 10.1016/j.wasman.2009.10.020. Epub 2009 Nov 27.
Modern mechanical-biological waste treatment plants for the stabilization of both the source-separated organic fraction of municipal solid wastes (OFMSW) and the mixed stream of municipal solid wastes (MSW) include a mechanical pretreatment step to separate recyclable materials such as plastics, glass or metals, before biological treatment of the resulting organic material. In this work, the role of storage and mechanical pretreatment steps in the stabilization of organic matter has been studied by means of respiration techniques. Results have shown that a progressive stabilization of organic matter occurs during the pretreatment of the source-separated OFMSW, which is approximately 30% measured by the dynamic respiration index. In the case of mixed MSW, the stabilization occurring during the reception and storage of MSW is compensated by the effect of concentration of organic matter that the pretreatment step provokes on this material. Both results are crucial for the operation of the succeeding biological process. Finally, respiration indices have been shown to be suitable for the monitoring of the pretreatment steps in mechanical-biological waste treatment plants, with a strong positive correlation between the dynamic respiration index and the cumulative respiration index across all samples tested.
现代机械-生物废物处理厂用于稳定城市固体废物（MSW）的源头分离有机部分（OFMSW）和混合 MSW，包括机械预处理步骤，以在生物处理产生的有机物质之前分离可回收材料，如塑料、玻璃或金属。在这项工作中，通过呼吸技术研究了储存和机械预处理步骤在稳定有机物中的作用。结果表明，在源头分离 OFMSW 的预处理过程中，有机物会发生渐进式稳定，通过动态呼吸指数测量，其稳定程度约为 30%。在混合 MSW 的情况下，接收和储存 MSW 过程中发生的稳定作用被预处理步骤对该物质引起的有机物浓度的影响所抵消。这两个结果对于后续生物过程的运行都至关重要。最后，呼吸指数已被证明适用于机械-生物废物处理厂预处理步骤的监测，在所有测试的样本中，动态呼吸指数与累积呼吸指数之间存在很强的正相关关系。
