Decarbonisation of industry will necessitate innovative technological solutions that allow for both reduced carbon footprint and security of supply. Biogas systems can allow electricity production on-demand. This study evaluated and compared different two-phase anaerobic digestion systems for continuous volatile fatty acid (VFAs) production and demand-driven biogas production at a whiskey distillery using byproducts as feedstock. The systems analysed were a two-phase continuously stirred tank reactor (CSTR) and a leach bed-expanded granular sludge bed reactor (LBR-EGSB) system. Both systems exhibited continuous VFA production (up to 10.4 g. L made up of primarily butyric acid and acetic acid) and rapid biogas production, achieving peak flow rates within 30 min. The peak biogas production from the demand-driven EGSB was 3.1 L. L. d compared to the CSTR, which recorded 1.8 L. L. d. Three kinetic models of both systems were assessed, which were able to describe the cumulative biogas production. A theoretical evaluation of processing butyric acid into butanol, to be blended with diesel, could produce a more sustainable transport fuel than diesel, reducing distillery-associated transport emissions by 16%.

中文翻译：

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评估大型酿酒厂需求驱动电力和生物丁醇运输燃料的两相厌氧消化系统

工业脱碳需要创新的技术解决方案，以减少碳足迹并保证供应安全。沼气系统可以按需发电。本研究评估并比较了威士忌酒厂使用副产品作为原料连续生产挥发性脂肪酸 (VFA) 和需求驱动的沼气生产的不同两相厌氧消化系统。分析的系统是两相连续搅拌釜反应器（CSTR）和浸出床膨胀颗粒污泥床反应器（LBR-EGSB）系统。两个系统均表现出连续的 VFA 生产（高达 10.4 g.L，主要由丁酸和乙酸组成）和快速沼气生产，在 30 分钟内达到峰值流量。需求驱动的 EGSB 的沼气产量峰值为 3.1 LL d，而 CSTR 的峰值沼气产量为 1.8 LL d。评估了两个系统的三个动力学模型，这些模型能够描述累计沼气产量。将丁酸加工成丁醇并与柴油混合的理论评估可以生产出比柴油更可持续的运输燃料，从而将与酿酒厂相关的运输排放量减少 16%。