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生物质材料经碱预处理后的发酵效率和甲烷产气量明显增加。为了提高预处理技术的经济效益及简化其工艺流程,利用自行设计的可控性恒温发酵装置,以秸秆为发酵原料,研究发酵沼液以及Ca(OH)2预处理对于水稻秸秆厌氧发酵产气量的影响。结果表明,与对照相比,沼液和Ca(OH)2预处理后的水稻秸秆木质素、半纤维素和纤维素含量显著降低,产气量明显提高。其中,Ca(OH)2预处理的产气量高于沼液预处理,8%浓度的Ca(OH)2下的秸秆产气量最高,为14374mL,比对照增加100.91%。该研究认为采用Ca(OH)2预处理水稻秸秆不仅简洁方便,成本低廉,而且具有较高的沼气产量,因此,可作为提高户用沼气产气效率的方法。
Biomass material pretreatment by alkali fermentation efficiency and methane gas production increased significantly. In order to improve the economic benefits of pretreatment technology and to simplify its process flow, straw was used as raw material for fermentation by using a controlled thermostatic fermentation device designed by itself. The effects of fermentation biogas slurry and Ca (OH) 2 pretreatment on anaerobic fermentation of rice straw The impact of gas. The results showed that the contents of lignin, hemicellulose and cellulose in rice straw after biogas slurry and Ca (OH) 2 pretreatment were significantly decreased compared with the control, and the gas production rate was significantly increased. Among them, the gas production of Ca (OH) 2 pretreatment was higher than that of biogas slurry pretreatment, and the yield of straw under 8% Ca (OH) 2 was the highest, 14374mL, 100.91% more than the control. The study suggests that the pretreatment of rice straw with Ca (OH) 2 is not only simple and convenient, low cost, but also has a high biogas production, therefore, can be used as a method to improve gas production efficiency of household biogas.