Anaerobic digestion processes for biogas generation using alperujo have been the subject of intensive studies suggesting that phenolic compounds act as microbial inhibitors in anaerobic digestion. Pretreatments are needed to reduce the effects of phenolic compounds and improve biogas production, especially for dry anaerobic digestion. However, industrial-scale implementation of these pretreatments is challenging, and it is unclear whether the improvement in biogas production justifies the energy expended on pretreatment. This study examines the energy analysis of dry anaerobic digestion and three alternative pretreatments: alkaline, oxidative and thermal. Results indicate that thermal pretreatment at 80°C with added water reduces phenolic compounds in alperujo by 35.4%. Meanwhile, pretreated with hydrogen peroxide in alkaline medium had the highest methane productivity (205 mL CH₄/g_VS). Even so, thermal pretreatment was only one with an energy return on investment greater than 1, signifying the necessity for energy analysis to ensure the viability of pretreatment processes.

中文翻译：

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采用氧化、热和碱性预处理的低水 alperujo 干式厌氧消化的投资能源回报分析

使用 alperujo 产生沼气的厌氧消化过程一直是深入研究的主题，表明酚类化合物在厌氧消化中充当微生物抑制剂。需要进行预处理来减少酚类化合物的影响并提高沼气产量，特别是对于干式厌氧消化。然而，这些预处理的工业规模实施具有挑战性，并且尚不清楚沼气产量的提高是否证明预处理所消耗的能源是合理的。本研究检查了干式厌氧消化和三种替代预处理的能量分析：碱性、氧化和热。结果表明，在80°C下加水进行热预处理可将 alperujo 中的酚类化合物减少35.4%。同时，在碱性介质中用过氧化氢预处理具有最高的甲烷产率（205 mL CH ₄ /g _VS）。即便如此，热预处理只是一种能源投资回报率大于1的方法，这表明有必要进行能源分析以确保预处理工艺的可行性。