This study evaluated the performance of a plug-flow reactor (PFR) for high-rate anaerobic co-digestion of complex agro-industrial wastes and used cooking oil or animal fat. The PFR was successfully operated up to an organic loading rate (OLR) of 21 g L⁻¹ d⁻¹, yielding biogas at 0.35 L g⁻¹ chemical oxygen demand (COD) influent. During the study period, supernatant COD at the PFR effluent remained between 4 and 7 g L⁻¹, with negligible volatile fatty acids’ concentrations (<500 mg L⁻¹) and no presence of foaming incidents. The biomass concentration inside the PFR, expressed as total suspended solids, remained between 30 and 60 g L⁻¹. Moreover, the above-mentioned anaerobic digestion technology has been currently scaled-up at 50 m³ PFR, while a full-scale facility of 240 kW-el is under construction in the region of north-eastern Greece.

这项研究评估了活塞流反应器（PFR）对复杂的农业工业废料和用过的食用油或动物脂肪进行高速率厌氧共消化的性能。PFR成功运行至有机负载率（OLR）为21 g L ^-1 d ^-1，产生的生物气为0.35 L g ^-1化学需氧量（COD）进水。在研究期间，PFR出水的上清液COD保持在4至7 g L ^-1之间，挥发性脂肪酸的浓度可忽略不计（<500 mg L ^-1），并且不存在起泡事件。PFR内部的生物质浓度以总悬浮固体表示，保持在30至60 g L ^-1之间。此外，上述厌氧消化技术目前已扩大到50 m ³ PFR，而希腊东北部地区正在建设240 kW-el的大型设备。