不同农作物秸秆厌氧消化的产甲烷潜力

Methane Production of Different Crop Straw by Anaerobic Digestion

为秸秆资源的全面利用提供理论依据,采用全自动甲烷潜力测试系统结合Modified Gompertz Equation模型,研究中温(35℃)条件下,小麦、水稻、干黄玉米、花生及青储玉米等10种农作物秸秆的甲烷生产潜力。结果表明:小麦、水稻、干黄玉米、花生、青储玉米、大蒜、红薯、薏米、高粱和大豆秸秆的累计甲烷产量分别为373.83 mL/g、356.30 mL/g、347.27 mL/g、334.11 mL/g、308.83 mL/g、161.71 mL/g、157.63 mL/g、155.02 mL/g、133.28 mL/g和129.50 mL/g。经Modified Gompertz Equation模型拟合的各作物秸秆产甲烷动力学方程的相关系数较高,除青储玉米的相关系数为0.87外,其余作物均在0.95~1.00,该模型可用于预测农作物秸秆产甲烷潜力;10种农作物秸秆的产甲烷潜力分别为青储玉米352.30 mL/g、干黄玉米350.36 mL/g、小麦345.63 mL/g、花生338.54 mL/g、水稻294.20 mL/g、薏米161.98 mL/g、大蒜158.20 mL/g、大豆155.26 mL/g、红薯134.77 mL/g和高粱132.04 mL/g。

The methane production of ten crop straw such as wheat,rice,dry yellow maize,peanut and silage maize is studied under medium temperature condition(35℃)by using automatic methane production testing system combined with Modified Gompertz Equation model to provide the theoretical basis for comprehensive utilization of straw resources.Result:The cumulative methane production of crop straw including wheat,rice,dry yellow maize,peanut,silage maize,garlic,sweet potato,coix,sorghum and soybean is 373.83 mL/g,356.30 mL/g,347.27 mL/g,334.11 mL/g,308.83 mL/g,161.71 mL/g,157.63 mL/g,155.02 mL/g,133.28 mL/g and 129.50 mL/g respectively.The correlation coefficient of kinetic equation for methane production of each crop straw fitting by Modified Gompertz Equation model is high.The correlation coefficient of silage maize is 0.87,while the correlation coefficient of other crops is 0.95-1.00.The model can be used for predicting methane production of crop straw.The methane production of ten crop straw including silage maize,dry yellow maize,wheat,peanut,rice,coix,garlic,soybean,sweet potato and sorghum is 352.30 mL/g,350.36 mL/g,345.63 mL/g,338.54 mL/g,294.20 mL/g,161.98 mL/g,158.20 mL/g,155.26 mL/g,134.77 mL/g and 132.04 mL/g respectively.