不同启动负荷下砀山酥梨果渣中温厌氧消化产气效果研究

Study on the Effect of Mesophilic Anaerobic Gas Production from Dangshan Pear Pomace Under Different Starting Loads

为探寻砀山酥梨果渣无害化处理新途径,采用中温38℃±1℃发酵条件和批次恒温厌氧发酵技术,分别研究了不同启动负荷(54.05 g·L^(-1)、60.4 g·L^(-1)、66.67 g·L^(-1)、72.85 g·L^(-1))条件下砀山梨果渣中温厌氧消化产气效果,并对最优启动负荷下砀山梨果渣的产甲烷效果进行分析。研究结果表明:启动负荷是影响厌氧消化过程的重要影响因素,累积产甲烷量随着启动负荷的增加先升高后降低,在启动负荷为60.4 g·L^(-1)时,系统运行稳定,可获得实验原料的最高TS产甲烷率210.02 mL·g^(-1)和最高VS产甲烷率214.34 mL·g^(-1),实验组累积产气可达26800 mL,平均日产气量1005 mL,产气平均CH 4体积分数为65.17%。表明砀山酥梨果渣适合作为沼气工程厌氧发酵原料。

To explore a new way of harmless treatment of Dangshansu pear pomace,medium temperature(38±1℃)fermentation conditions and batch constant temperature anaerobic fermentation technology were used to study different starting loads(54.05 g·L^(-1),60.4 g·L^(-1),66.67 g·L^(-1),72.85 g·L^(-1)),the gas production effect of mesophilic anaerobic digestion of Dangshan pear pomace,and the methane production effect of Dangshan pear pomace under the optimal starting load was analyzed.The research results show that the start-up load is an important factor affecting the anaerobic digestion process.The cumulative methane production first increases and then decreases with the increase of the start-up load.When the start-up load is 60.4 g·L^(-1),the system runs stably,and the experimental results can be obtained.The highest TS methane production rate of the raw material was 210.02 mL·g^(-1) and the highest VS methane production rate was 214.34 mL·g^(-1).The cumulative gas production of the experimental group could reach 26800 mL,the average daily gas production was 1005 mL,and the average CH 4 volume fraction was 65.17%.It shows that Dangshansu pear pomace is suitable as raw material for anaerobic fermentation in biogas engineering.