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为实现玉米秸的高效能源化转化 ,提出通过生物与化学预处理提高厌氧消化效率和生物气产量的新方法。研究了经白腐真菌 Pleurotus f lorid a生物处理和经氢氧化钠、氨水与尿素化学处理后 ,玉米秸主要成份木质素、纤维素、半纤维素、总氮和干物质等的变化规律 ,及其对生物气产量的影响。对经不同处理后的玉米秸进行了相应厌氧消化试验。结果显示 ,除尿素处理外 ,所有其它处理都可不同程度地提高玉米秸的产气量 ;其中 ,经氢氧化钠处理的获得了最高的产气量 ,与未处理和经生物处理的玉米秸相比 ,其产气量分别提高了 78.3%和 13.2 %。由于化学处理方法简单、管理容易、处理时间短 ,并可获得较高的产气量 ,因此 ,在大规模应用时 ,推荐使用氢氧化钠作预处理 (添加量为干物质质量的 8%)。该研究结果为大幅提高玉米秸的产气量提供了一个新的有效的方法。
In order to achieve efficient energy conversion of corn stalks, a new method for improving anaerobic digestion efficiency and biogas production through biological and chemical pretreatment was proposed. The changes of lignin, cellulose, hemicellulose, total nitrogen and dry matter of main components of corn stalk were studied after biological treatment of white rot fungus Pleurotus fiorid a and chemical treatment of sodium hydroxide, ammonia and urea, and Its impact on biogas production. Corresponding anaerobic digestion experiments were carried out on corn stalks treated differently. The results showed that, except for urea treatment, all other treatments could increase the gas production of corn stalk to some extent. Among them, the highest gas production was obtained by sodium hydroxide treatment, compared with untreated and biologically treated corn stalks , Their gas production increased by 78.3% and 13.2% respectively. Due to its simple chemical treatment, easy management, short processing time and high gas production, sodium hydroxide is recommended for pretreatment (8% of dry matter mass) for large-scale applications. The results of this study provide a new and effective method for significantly increasing the gas production of corn stalks.