Department of Environmental Engineering, Laboratory of Wastewater Management and Treatment Technologies, Democritus University of Thrace, Xanthi, Greece.
KETES (Hellenic Army Research & Technology Centre), Athens, Greece.
Waste Manag Res. 2021 Mar;39(3):508-515. doi: 10.1177/0734242X21991898. Epub 2021 Feb 13.
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 d, yielding biogas at 0.35 L g chemical oxygen demand (COD) influent. During the study period, supernatant COD at the PFR effluent remained between 4 and 7 g L, with negligible volatile fatty acids' concentrations (<500 mg L) and no presence of foaming incidents. The biomass concentration inside the PFR, expressed as total suspended solids, remained between 30 and 60 g L. Moreover, the above-mentioned anaerobic digestion technology has been currently scaled-up at 50 m PFR, while a full-scale facility of 240 kW-el is under construction in the region of north-eastern Greece.
本研究评估了一种推流式反应器（PFR）在高负荷下处理复杂农业工业废物与食用油或动物脂肪的协同厌氧消化的性能。该 PFR 成功地在有机负荷率（OLR）高达 21 g L d 的情况下运行，以 0.35 L g 化学需氧量（COD）进水的速率产生沼气。在研究期间，PFR 出水的上清液 COD 保持在 4 到 7 g L 之间，挥发性脂肪酸浓度可忽略不计（<500 mg L），且没有发生泡沫问题。PFR 内的生物质浓度，以总悬浮固体表示，保持在 30 到 60 g L 之间。此外，上述厌氧消化技术目前已在 50 m PFR 中进行放大，而在希腊东北部地区正在建设一个 240 kW-el 的全规模设施。
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