Disposal of the increasingly huge amounts of sewage sludge (SeS) has become an impending problem worldwide. To solve this problem, a high-solid anaerobic membrane bioreactor (AnMBR) was used for the anaerobic co-digestion (AcoD) of SeS and food waste (FW). This study investigated the effects of SeS ratio on the methanogenic performance of the AcoD with a gradual increase value from 0 to 25%, 50%, 75% and 100% (total solids based). The results showed that the highest methanogenic performance was achieved at mono FW digestion. As for the co-digestion, the optimal FW/SeS ratio for methanogenic performance was 75%:25% among all the mixing ratios. The COD based biogas yield and methane yield were 0.498 L-biogas/g-COD_fed and 0.295 L-CH₄/g-COD_fed at this optimal mixing ratio, which were 67.7% and 67.6% higher than those of the mono SeS digestion, respectively. The upgraded values were attributed to the improved hydrolysis ratio (by 8.14%) and the balanced carbon-to-nitrogen (C/N) ratio by co-digestion with FW, which synergistically stimulated methanogenesis ratio by 81.0%. The continuous membrane filtration property was investigated and four typical trans-membrane pressure (TMP) variation curves at different fouling degrees were determined. The membrane could sustainably operate at a flux of 6 L/m²/h (LMH) at the mixed liquor total solids (MLTS) concentration of 25 - 30 g/L. The combination of continuous membrane filtration property, particle size distribution of the mixed liquor and the external forces analysis was firstly applied to unravel the membrane fouling mechanism of a high-solid AnMBR. The result of this study will contribute to the establishment of an efficient FW and SeS treatment strategy.

日益增多的污水污泥（SeS）的处置已成为全球迫在眉睫的问题。为了解决这个问题，将高固体厌氧膜生物反应器（AnMBR）用于SeS和食物垃圾（FW）的厌氧共消化（AcoD）。这项研究调查了SeS比例对AcoD产甲烷性能的影响，其逐渐增加的值从0％增至25％，50％，75％和100％（基于总固体）。结果表明，在单FW消化中获得了最高的产甲烷性能。至于共消化，在所有混合比中，产甲烷性能的最佳FW / SeS比为75％：25％。基于COD产生沼气和甲烷产量分别为0.498 L-沼气/克-COD_馈和0.295 L-CH ₄ /克-COD_馈在此最佳混合比下，分别比单SeS消化高67.7％和67.6％。值的提高归因于水解率的提高（提高了8.14％）和与FW共同消化产生的平衡的碳氮比（C / N），从而协同地将甲烷生成率提高了81.0％。研究了连续膜的过滤特性，并确定了四个典型的跨膜压力（TMP）在不同污垢度下的变化曲线。膜可以以6 L / m ²的通量持续运行/ h（LMH）在混合液总固体（MLTS）浓度为25-30 g / L的情况下。首先将连续膜过滤性能，混合液的粒径分布和外力分析相结合，以揭示高固体含量的AnMBR的膜污染机理。这项研究的结果将有助于建立有效的FW和SeS治疗策略。