It has been proven that ultrasonic pretreatment (UP) has positive effect on biogas generation from previous lab-scale studies. However, that is not always the case in larger scale processes. The purpose of this study was to evaluate the effectiveness of UP to biogas generation in terms of anaerobic digestion process and energy efficiency. Parameters including total solids (TS) and ultrasonic treatment operational parameters of organic solid waste (OSW) resulted from our past lab scale UP studies were applied in this study. OSW with 6-10 % TS was treated using a lab-scale ultrasonic processor using various power densities (0.2 - 0.6 W/mL) at different time periods up to 30 min. Results of lab scale confirmed that OSW with 6% TS sonicated with 0.2 W/mL power density in 30 min gave the best outcome for the pilot scale experiment. To simulate the condition of an actual scale, in addition to energy analysis, two different organic loading rates (OLR), namely 500 and 1500 gVS/m³day were examined. The pilot digester was fed with OSW with or without the pretreatment based on the aforementioned specifications. The results showed that UP effectively improves biogas generation in terms of quantity and quality (CH₄/CO₂). Furthermore, it decreases the time to reach the maximum cumulative biogas volume comparing to the untreated feed. The key achievement of this research has confirmed that although the relative increase in the energy gain by the influence of UP was more remarkable under the 500 gVS/m³day OLR, energy analysis showed a better energy gain and energy benefit as well as jumping in biogas yield up to 80% for UP treated OSW under 1500 gVS/m³day OLR..

先前的实验室规模研究已经证明，超声预处理（UP）对沼气产生具有积极作用。但是，在大规模过程中并非总是如此。这项研究的目的是从厌氧消化过程和能源效率方面评估UP对沼气产生的有效性。本研究采用了我们过去实验室规模UP研究得出的包括总固体（TS）和有机固体废物超声处理操作参数（OSW）的参数。使用实验室规模的超声波处理器，在长达30分钟的不同时间段内，使用各种功率密度（0.2-0.6 W / mL）处理具有6-10％TS的OSW。实验室规模的结果证实，在30分钟内用0.2 W / mL功率密度超声处理的6％TS的OSW为中试规模的实验提供了最佳结果。检查³天。根据上述规格，对中试消化池进行OSW预处理或不进行预处理。结果表明，UP在数量和质量（CH ₄ / CO ₂）方面有效地改善了沼气的产生。此外，与未处理的饲料相比，它减少了达到最大累积沼气量的时间。这项研究的关键成果已经证实，尽管在500 gVS / m ³天OLR下，UP的影响下能量获取的相对增加更为显着，但能量分析显示出了更好的能量获取和能量受益，并且跳跃增加了。在1500 gVS / m ³天OLR下，经UP处理的OSW的沼气产率高达80％。