Plug-flow reactor for volatile fatty acid production from the organic fraction of municipal solid waste: Influence of organic loading rate

2022 ◽  
Vol 10 (1) ◽  
pp. 106963
Author(s):  
Elena Rossi ◽  
Isabella Pecorini ◽  
Paola Paoli ◽  
Renato Iannelli
2021 ◽  
pp. 0734242X2199189
Author(s):  
Alexandros Eftaxias ◽  
Dimitrios Georgiou ◽  
Vasileios Diamantis ◽  
Alexandros Aivasidis

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.


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