In order to minimize waste liquor, save resources, and reduce costs, the effects of alkali recycling and ozone recycling on enzymatic conversion in alkali combined with ozone pretreatment of corn stover and the mechanism were studied. The results showed that as the number of cycles of alkali/ozone filtrate increased, the enzymatic conversion and the loss of reducing sugars showed a downward trend. It was indicated that the ability of alkali to damage lignocellulosic decreased with an increasing number of alkali circulation and the accumulation of lignin degradation products generated during ozonolysis inhibited enzymatic conversion. When the ozone filtrate was recovered and used for hydrolysis directly, the enzymatic conversion rates were basically the same compared with the first self-circulation of ozone filtrate, and no sewage was discharged. In conclusion, the optimal circulating pretreatment was four times alkali circulation and ozone filtrate was used as an enzymolysis liquid directly, and the conversion rates of cellulose and hemicellulose were 85.96% and 34.26%, respectively, saving 44% alkali consumption at the same time. This paper provided the theoretical basis for the development of lignocellulose pretreatment technology with low cost, high efficiency, and high conversion rate.

中文翻译：

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碱回收和臭氧回收结合碱对玉米秸秆的臭氧预处理对碱转化酶的影响及其机理。

为了最大限度地减少废液，节约资源，降低成本，研究了碱回收和臭氧回收对碱法酶解与玉米秸秆臭氧预处理相结合的作用及其机理。结果表明，随着碱/臭氧滤液循环次数的增加，酶转化率和还原糖损失呈下降趋势。结果表明，碱对木质纤维素的破坏能力随碱循环次数的增加而降低，臭氧分解过程中产生的木质素降解产物的积累抑制了酶的转化。当回收臭氧滤液并直接用于水解时，其酶转化率与臭氧滤液的第一次自循环相比基本相同，没有污水排放。综上所述，最佳循环预处理为碱循环的四倍，直接以臭氧滤出液为酶解液，纤维素和半纤维素的转化率分别为85.96％和34.26％，同时节省了44％的碱消耗。本文为开发低成本，高效率，高转化率的木质纤维素预处理技术提供了理论依据。