The use of lignocellulosic biomass such as rice straw can help subsidize the cost of producing value-added chemicals. However, inhibitory compounds, such as phenolics, produced during the pre-treatment of biomass, hamper the saccharification process. Laccase and electrochemical stimuli are both well known to reduce phenolic compounds. Therefore, in this study, we implemented a bioelectrochemical detoxification system (BEDS), a consolidated electrochemical and enzymatic process involving laccase, to enhance the detoxification of phenolics, and thus achieve a higher saccharification efficiency. Saccharification of pretreated rice straw using BEDS at 1.5 V showed 90% phenolic reduction (Ph_r), thereby resulting in a maximum saccharification yield of 85%. In addition, the specific power consumption when using BEDS (2.2 W/Kg Ph_r) was noted to be 24% lower than by the electrochemical process alone (2.89 W/kg Ph_r). To the best of our knowledge, this is the first study to implement BEDS for reduction of phenolic compounds in pretreated biomass.

中文翻译：

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稻草酶促预处理过程中酚类化合物的生物电化学解毒。

木质纤维素生物质（如稻草）的使用可以帮助补贴生产增值化学品的成本。然而，在生物质的预处理过程中产生的抑制性化合物（例如酚类）阻碍了糖化过程。漆酶和电化学刺激都可以减少酚类化合物。因此，在这项研究中，我们实施了生物电化学解毒系统（BEDS），这是一种结合漆酶的电化学和酶促过程，以增强酚类化合物的解毒作用，从而实现更高的糖化效率。使用BEDS在1.5 V的条件下对预处理的稻草进行糖化显示酚类减少90％（Ph _r），因此最大糖化产率为85％。此外，使用BEDS时的单位功耗（2.2 W / Kg Ph _r）比单独的电化学过程（2.89 W / kg Ph _r）低24％。据我们所知，这是首次实施BEDS减少预处理生物质中酚类化合物的研究。