This paper evaluates the effect of ultrasonication on anaerobic biodegradability of lignocellulosic residues. While US has been commonly applied as a pre-treatment of the feed substrate, in the present study a non-conventional process configuration based on recirculation of sonicated digestate to the biological reactor was evaluated at the lab scale. Sonication tests were carried out at different applied energies ranging between 500 and 50,000 kJ/kg TS. Batch anaerobic digestion tests were performed on samples prepared by mixing sonicated and untreated substrate at two different ratios (25:75 and 75:25 w/w). The results showed that when applied as a post-treatment of digestate, US can positively affect the yield and kinetics of anaerobic digestion, mainly due to the dissolution effect of complex organic molecules that have not been hydrolyzed by biological degradation. The maximum gain in CH4 production was 13% compared to the control run at Es = 20,000 kJ/kg TS.
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机译：本文评估了超声波对木质纤维素残留物的厌氧生物降解性的影响。虽然我们通常被应用于进料底物的预处理，但在本研究中，在实验室规模中评价基于超声处理与生物反应器的超声处理的非常规工艺构型。在不同的施加能量下进行超声检查，范围为500至50,000 kJ / kg ts。对通过在两种不同比率（25:75和75:25W / W）中通过混合超声和未处理的基材制备的样品进行批次厌氧消化试验。结果表明，当应用作为消化后的治疗后，美国可以积极影响厌氧消化的产量和动力学，主要是由于未通过生物降解不水解的复杂有机分子的溶出作用。与ES = 20,000 kJ / kg Ts的控制运行相比，CH4产生的最大增益为13％。
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