A high-solid anaerobic membrane bioreactor (AnMBR) treating food waste was continuously operated to investigate AnMBR performance and membrane fouling behavior. The optimal methane yield of 0.57 ± 0.08 L-CH₄/g-VS_in and organic loading rate (OLR) of 6.00 ± 0.59 g-VS/L/d indicated that a high-rate methane fermentation of food waste was achieved by the AnMBR. The resistance-in-series (RIS) model was applied to delineate the resistances of different fouling fractions and elucidate fouling behavior under different filtration modes. The results showed that organic pore blocking was the dominant fouling at the low filtration to relaxation (F/R) ratio, accounting for 60% of the total resistance. By contrast, the cake layer governed the fouling when the F/R ratio became larger, accounting for 54% of the total resistance. To better understand membrane fouling behavior, the characteristics of cake sludge were investigated and compared with those of bulk sludge. Dissolved organic matter (DOM) analysis revealed that soluble microbial by-products played a comparably significant role as aromatic protein in membrane fouling in the high-solid AnMBR. This work provided a deep understanding of the membrane fouling behavior of a high-solid AnMBR in treating food waste and proposed the most appropriate membrane cleaning methods under different filtration modes, which is expected to contributes to the design, operation and further application of the high-solid AnMBR.

连续运行高固体厌氧膜生物反应器（AnMBR）处理食物残渣，以研究AnMBR性能和膜污染行为。0.57±0.08 L-CH的最优产量甲烷₄ / G-VS_在有机负载率（OLR）为6.00±0.59 g-VS / L / d，表明AnMBR实现了餐厨垃圾甲烷的高速发酵。应用串联电阻（RIS）模型来描述不同污垢组分的阻力，并阐明在不同过滤模式下的污垢行为。结果表明，在低的过滤松弛比（F / R）下，有机孔堵塞是主要的污垢，占总阻力的60％。相反，当F / R比变大时，滤饼层决定了结垢，占总电阻的54％。为了更好地了解膜的污垢行为，对饼状污泥的特性进行了研究，并将其与散装污泥进行了比较。溶解有机物（DOM）分析显示，可溶性微生物副产物在高固体含量的AnMBR膜污染中作为芳香族蛋白质起着相当重要的作用。这项工作深入了解了高固含量的AnMBR在处理食物垃圾时的膜结垢行为，并提出了在不同过滤模式下最合适的膜清洗方法，有望为高浓度AnMBR膜的设计，操作和进一步应用做出贡献。 -坚实的AnMBR。