Biogas production using waste activated sludge (WAS) is one of the most demanding technologies for sludge treatment and generating energy in sustainable manner. The present study deals with the photocatalytic pretreatment of WAS using [email protected] ([email protected]) nanocomposite as means for increasing its degradability for improved biogas production by anaerobic digestion (AD). Photocatalysis accelerated the hydrolysis of WAS and increased the sCOD by 6.7 folds after 6 h and transform tCOD into bioavailable sCOD. After the AD of WAS, a removal of organic matter (60.6%) and tCOD (69.3%) was achieved in photocatalytic pretreated sludge. The biogas production was 1.6 folds higher in photocatalytic sludge with accumulative biogas up to 1645.1 ml L⁻¹vs after 45 days compared with the raw sludge (1022.4 ml L⁻¹_VS). Moreover, the photocatalysis decrease the onset of methanogenesis from 25 to 12 days while achieve the maximum conversion rate of reducing sugars into organic acids at that time. These results suggested that photocatalysis is an efficient pretreatment method and [email protected] can degrade sludge efficiently for enhance biogas production in anaerobic digestion process.

使用废物活性污泥（WAS）生产沼气是对污泥进行处理和以可持续方式产生能量的最苛刻的技术之一。本研究涉及使用[电子邮件保护的]（[电子邮件保护的]）纳米复合材料作为WAS的光催化预处理方法，以提高其可降解性，从而提高厌氧消化（AD）的沼气产量。光催化加速了WAS的水解，并在6小时后使sCOD增加了6.7倍，并将tCOD转化为可生物利用的sCOD。在WAS AD处理之后，在光催化预处理的污泥中实现了有机物（60.6％）和tCOD（69.3％）的去除。与45天后相比，光催化污泥的累积沼气高达1645.1 ml L ^-1时，沼气的产量高出1.6倍（1022.4 ml L^-1 _VS）。此外，光催化将甲烷生成的开始时间从25天减少到12天，同时达到了当时还原糖向有机酸转化的最大转化率。这些结果表明，光催化是一种有效的预处理方法，并且[电子邮件保护]可以有效地降解污泥，从而提高厌氧消化过程中沼气的产生。