Pavan P, Battistoni P, Mata-Alvarez J, Cecchi F
University of Venice, Department of Environmental Science, Calle Larga S. Marta 2137, Venice, Italy.
Water Sci Technol. 2000;41(3):75-81.
The study concerns the application of the semi-dry single phase thermophilic anaerobic digestion process to the organic fraction of municipal solid waste. The experiments were carried out using 3 m3 and 1 m3 CSTR pilot scale reactors. The process performance in terms of biogas yields, digester stability and kinetic aspects was studied, considering a progressive increase in the feed biodegradability, in order to evaluate the process behaviour changing from an undifferentiated collection of waste to a separate collection. This was carried out using blends of two different kinds of substrates: mechanically sorted organic fraction of municipal solid wastes (MS-OFMSW) and source sorted organic fraction of municipal solid wastes (SS-OFMSW). The study shows that OLR up to 6 kg TVS/m3d can be applicable for the medium selected fraction (TVS/TS < or = 0.7), while for the MS-OFMSW alone this limit can be doubled. The results obtained with SS-OFMSW alone suggest the use of the double phase process to give more stable conditions.
该研究关注半干式单相高温厌氧消化工艺在城市固体废物有机组分处理中的应用。实验采用3立方米和1立方米的CSTR中试规模反应器进行。考虑到进料生物降解性的逐步提高，研究了该工艺在沼气产量、消化器稳定性和动力学方面的性能，以评估从混合收集废物到分类收集过程中工艺行为的变化。这是通过两种不同类型底物的混合物来实现的：机械分选的城市固体废物有机组分（MS-OFMSW）和源头分选的城市固体废物有机组分（SS-OFMSW）。研究表明，对于所选的中等组分（TVS/TS≤0.7），有机负荷率（OLR）高达6千克总挥发性固体/立方米·天是适用的，而对于单独的MS-OFMSW，此限值可加倍。单独使用SS-OFMSW获得的结果表明，采用两相工艺可提供更稳定的条件。
