This paper evaluates the effects of ultrasonication (US) applied, individually or in combination with a mechanical treatment, to the effluent of anaerobic digestion (AD) of lignocellulosic waste, on methane (CH₄) production. US of the substrate downstream of AD is a relatively novel concept aimed at improving the degradation of recalcitrant components in order to enhance the overall energy efficiency of the process. US tests were carried out on real digestate samples at different energies (500−50,000 kJ/kg total solids (TS), corresponding to sonication densities of 0.08−0.45 W/ml). AD tests were performed on mixtures of sonicated (S_us) and untreated (S) substrate at two different S_us: S ratios (25:75 and 75:25 w/w), simulating post-sonicated material recycling to the biological process. The US effect was estimated through the solubilization degree of organic matter, as well as the CH₄ production yield and kinetics, which were all found to be enhanced by the treatment. At S_us: S = 75:25 and E_s ≥ 20,000 kJ/kg TS (0.25 W/ml), CH₄ production improved by 20% and the values of the kinetic parameters increased by 64–82%.

本文评估了超声处理（美国）单独或与机械处理相结合对木质纤维素废料厌氧消化（AD）废水对甲烷（CH ₄）产生的影响。AD下游的基材的US是相对新颖的概念，旨在改善难降解组分的降解，从而提高该方法的整体能效。US测试是在不同能量（500-50,000 kJ / kg总固体（TS），对应于0.08-0.45 W / ml的超声密度）下的真实消化样品上进行的。在两个不同的S _us下，对超声（S _us）和未处理（S）底物的混合物进行AD测试：S比率（25:75和75:25 w / w），模拟了超声处理后的材料在生物过程中的循环利用。通过有机物的增溶度以及CH _4的产率和动力学来评估US效果，这些均被处理提高了。而后_我们：S = 75:25和Ë_小号≥20000千焦耳/公斤TS（0.25W /毫升），CH ₄生产了20％的和改进的动力学参数的值增加了64-82％。