采用电化学厌氧消化（EAD）连续发酵工艺，以乙酸钠为底物，在温度为35℃、pH为中性的条件下，考察底物质量浓度和水力滞留时间对电化学厌氧消化的影响，分析了不同条件下的产气量、气体含量、底物利用率及产甲烷转化率。结果表明，当底物质量浓度从15 g/L增加到25 g/L时，甲烷体积分数先增加后减少，甲烷产率一直降低，导致电化学厌氧消化的降解效果降低。延长水力滞留时间能提高电化学厌氧消化的效果，促进底物在反应体系内的充分氧化分解，提高甲烷产率，但反应器运行效率会减小。

The effect of substrate concentration and hydraulic retention time on electrochemical anaerobic digestion (EAD) is analyzed by employing EAD continuous fermentation process with sodium acetate as the substrate,at 35℃ and a neutral pH.Gas production,gas content,substrate utilization rate and methane conversion rate under different conditions are analyzed.The results indicate when the substrate concentration increases from 15 g·L^-1 to 25 g·L^-1,methane content increases firstly and decreases then,and methane yield remains dropping all the time,resulting in a decrease in the degradation effect of EAD.Extending hydraulic retention time can improve the efficiency of EAD,promote sufficient oxidation and decomposition of the substrate in the reaction system,and increase methane yield,but the operating efficiency of the reactor will be reduced.

刘海波(1997-),男,硕士研究生,研究方向为MEC制氢,2411367039@qq.com