This paper studied the effect of microwave (MW) pretreatment on anaerobic co-digestion of sludge (SS) and food waste (FW). Using SS and FW as digestive substrates, the MW pretreatment method was used to determine the changes in the substrate matrix by means of batch anaerobic digestion at 37 °C. The kinetics of methane production were calculated, and the changes in organic matter during anaerobic co-digestion, the properties of the anaerobic-digested effluent, and the net energy output of the co-digestion system were determinated. The results showed that MW pretreatment was beneficial to the dissolution of organic matter, conversion of protein to NH₄⁺-N, cumulative methane production, unit biomethane yield, and reaction rate of methane production in the SS and FW anaerobic co-digestion system. The highest cumulative methane production in the co-digestion system reached 3446.3 ± 172.3 mL (35 days), which was 19.93% higher than that of the control. Furthermore, MW pretreatment significantly increased the accumulation of VFAs and the content of butyric acid in the anaerobic-digested effluent, which was beneficial to the methanogenesis process. The MW pretreatment of all co-digested substrates produced a greater net energy output than the control, and the MW-SS + MW-FW group yielded the highest net energy output, which was 76.25 kJ/g Fed VS. The results indicated that MW pretreatment prior to SS and FW anaerobic co-digestion is an effective way to improve the anaerobic digestion efficiency and energy recovery rate.

本文研究了微波（MW）预处理对污泥（SS）和食物垃圾（FW）厌氧共消化的影响。使用SS和FW作为消化底物，通过MW预处理方法，通过在37°C下进行分批厌氧消化来确定底物基质的变化。计算了甲烷的生成动力学，确定了厌氧共消化过程中有机物的变化，厌氧消化后的废水的性质以及共消化系统的净能量输出。结果表明，微波预处理有利于有机物的溶解，蛋白质向NH ₄ ^+的转化。-N，SS和FW厌氧共消化系统中的累积甲烷产量，单位生物甲烷产率以及甲烷产生的反应速率。共消化系统中最高的累积甲烷产量达到3446.3±172.3 mL（35天），比对照组高19.93％。此外，MW预处理显着增加了厌氧消化废水中VFA的积累和丁酸的含量，这有利于甲烷化过程。所有共同消化的底物的MW预处理产生的净能量输出均高于对照，MW-SS + MW-FW组产生的净能量输出最高，为76.25 kJ / g FedVS。