香蕉杆组分测定及其产沼气潜力的研究

【目的】测定香蕉杆中的纤维素、半纤维素和木质素组分,并对其发酵产沼气的潜力进行研究,以期为香蕉杆的资源化利用提供可靠的基础资料。【方法】分别采用改进后的硫酸-重铬酸钾氧化法、2mol/L盐酸水解法和72%浓硫酸法测定香蕉杆中纤维素、半纤维素和木质素的含量;在35℃恒温条件下进行厌氧发酵产沼气,绘制不同原料产沼气过程变化曲线图。【结果】香蕉杆纤维素、半纤维素和木质素含量分别为17.47%、11%、6.86%,其厌氧发酵产沼气最高可达到(155±3)mL/g TS。【结论】香蕉杆纤维含量较高,可作为沼气发酵原料使用,为香蕉杆的资源化利用提供有益参考。

Determination of Banana Stalk Components and its Researches on the Biogas Potential

Objective]The components of cellulose,hemicellulose and lignin in banana stalk were determined and its fermentation to produce biogas potential was studied to provide reliable basic data for the utilization of banana stalk.Methods]Cellulose of banana stalk was measured by potassium dichromate oxidation titration.Hemicellulose was the hydrolysis of 2 mol/L HCl.The lignin was separated by acetate and hydrolyzed by 72% H2SO4.Under constant temperature of 35℃ in water bath,different raw materials were anaerobically fermented in the simple device.Then,the curve drawing of biogas processes in different raw materials was mapped.Results]The component of cellulose,hemicellulose and lignin in banana stalk were 17.47%,11% and 6.86%,respectively.It presented that banana stalk was a good biomass raw material and its biogas production potential could reach to (155±3) mL/g TS.Conclusion]In view of highly lignocellulosic component,banana stalk could be used as a raw material for biogas production.Biogas fermentation would provide a good reference for the research and development of the comprehensive utilization of vegetable waste.