Despite many studies recently investigated the addition of conductive materials for enhancing biomethane recovery in anaerobic digestion, there have been limited efforts to adopt this strategy in high-solids anaerobic digestion (HSAD) with percolate recirculation. In this study, two identical lab-scale mesophilic (36 °C) HSAD systems were operated with the organic fraction of municipal solid waste (OFMSW) under similar operating conditions, including food to microorganism ratio and daily percolate recirculation rate. The percolate tank of the test HSAD system was amended with 15 g/L of powdered activated carbon (PAC). After 30 days of operation, the cumulative biomethane yield for the test reactor was 17 % higher than the control reactor (109 vs. 93 L CH₄/kg VS). Furthermore, PAC addition showed additional benefits by lowering free ammonia nitrogen (FAN) and volatile fatty acids (VFAs) concentrations that can inhibit anaerobic digestion. Nonetheless, the preliminary economic analysis suggested that the HSAD amended with PAC is practically challenging and will only be economically feasible if PAC can be recycled and reused for the long-term operation or several cycles.

尽管最近有许多研究调查了添加导电材料以增强厌氧消化中生物甲烷的回收率，但在通过渗滤液再循环的高固体厌氧消化（HSAD）中采用这种策略的努力有限。在这项研究中，两个相同的实验室规模的中温（36°C）HSAD系统与城市固体废物（OFMSW）的有机部分在相似的运行条件下运行，包括食物与微生物的比例和每日渗透物再循环率。用15 g / L的粉末状活性炭（PAC）修改了测试HSAD系统的渗滤液罐。运行30天后，测试反应器的累积生物甲烷产率比对照反应器高17％（109对93 L CH _4）/ kg V​​S）。此外，PAC的添加通过降低可抑制厌氧消化的游离氨氮（FAN）和挥发性脂肪酸（VFA）的浓度显示出更多的优势。尽管如此，初步的经济分析表明，用PAC修改的HSAD在实际中具有挑战性，并且只有在PAC可以长期使用或多次循环使用的情况下，才可以在经济上可行。