ABSTRACT

Grapes are one the world’s leading fruit crops, with close to 77 million tonnes harvested per year. Grapes are commonly used to produce wine; a process which generates different wastes such as grape mark waste (skins, seeds and stalks), lees and other residues. This study evaluates the treatment of winery waste derived from ecological cultivation by anaerobic digestion to produce energy in the form of methane. Grape marc waste, Verdejo and Pedro Ximenez (PX) wine lees were digested under stable conditions at mesophilic conditions. The PX lees showed the highest methane yield production (433 L_STP CH₄/kg VS) with a maximum OLR of 4.58 kg VS/m³·d. In the evaluated range the process was stable with a range of biodegradability of 51–79%. Due to different types of winery waste are generated at consecutive stages of the main production process, the sequential treatment of PX lees, Verdejo lees and grape marc waste in the same anaerobic digester could be an interesting option. This procedure would facilitate the management of the residual streams generated in wineries during the year and promotes the circular economy in the Montilla-Moriles Protected Designation of Origin.

摘要

葡萄是世界上主要的水果作物之一，每年收获近 7700 万吨。葡萄通常用于酿制葡萄酒；一个产生不同废物的过程，如葡萄标记废物（皮、种子和茎）、酒糟和其他残留物。本研究评估了通过厌氧消化处理生态栽培产生的酿酒厂废物，以产生甲烷形式的能量。葡萄渣废料、Verdejo 和 Pedro Ximenez (PX) 酒糟在稳定的中温条件下消化。PX 酒糟显示出最高的甲烷产量（433 L _STP CH ₄ /kg VS），最大 OLR 为 4.58 kg V​​S/m ³·d. 在评估范围内，该过程稳定，生物降解性范围为 51-79%。由于在主要生产过程的连续阶段会产生不同类型的酒厂废物，在同一个厌氧消化器中依次处理 PX 酒糟、Verdejo 酒糟和葡萄渣废料可能是一个有趣的选择。该程序将有助于管理酿酒厂在这一年中产生的残余流，并促进 Montilla-Moriles 受保护原产地名称中的循环经济。