University of Hohenheim, State Institute of Agricultural Engineering and Bioenergy, Garbenstraße 9, 70599 Stuttgart, Germany.
University of Hohenheim, State Institute of Agricultural Engineering and Bioenergy, Garbenstraße 9, 70599 Stuttgart, Germany.
Bioresour Technol. 2022 Sep;360:127633. doi: 10.1016/j.biortech.2022.127633. Epub 2022 Jul 18.
Two-stage anaerobic digestion (TSAD) systems have been studied on a laboratory scale for about 50 years. However, they have not yet reached industrial scale despite their potential for future energy systems. This review provides an analysis of the TSAD technology, including the influence of process parameters on biomass conversion rates. The most common substrate (35.2% of the 38 selected studies) used in the analysed data was in the category of rapidly hydrolysable industrial waste with an average dry matter content of 7.24%. The highest methane content of 85% was reached when digesting food waste in a combination of two mesophilic continuously stirred tank reactors with an acidic (pH 5.5) first stage and alkaline (pH 7) second stage. Therefore, the review shows the limitations of the TSAD technology, future research directions, and the effect of integration of TSAD systems into the current strategy to reduce greenhouse gas emissions.
两段式厌氧消化（TSAD）系统已在实验室规模上进行了约 50 年的研究。然而，尽管它们具有未来能源系统的潜力，但尚未达到工业规模。本综述分析了 TSAD 技术，包括工艺参数对生物质转化率的影响。在分析的数据中，最常用的底物（38 项选定研究中的 35.2%）属于可快速水解的工业废物，平均干物质含量为 7.24%。当在两个中温连续搅拌罐反应器中消化食物废物时，采用酸性（pH5.5）第一阶段和碱性（pH7）第二阶段组合，可达到 85%的最高甲烷含量。因此，该综述展示了 TSAD 技术的局限性、未来的研究方向以及将 TSAD 系统集成到当前减少温室气体排放策略中的影响。
