RT journal article T1 New criteria to determine the destabilization of the acidogenic anaerobic co-digestion of organic fraction of municipal solid waste (OFMSW) with mixed sludge (MS) A1 Angeríz Campoy, Ruben A1 Fernández Güelfo, Luis Alberto A1 Tyagi, Vinay Kumar A1 Álvarez Gallego, Carlos José A1 Romero García, Luis Isidoro A2 Ingeniería Química y Tecnología de Alimentos K1 Co-digestion K1 Organic Fraction of Municipal Solid Waste K1 Hydrolytic Destabilization K1 Mixed Sludge K1 Bio-hydrogen AB Effect of hydraulic retention time (HRT) on bio-hydrogen production from co-digestion of organic fraction of municipal solid waste (OFMSW) and mixed sludge (MS) in dry thermophilic conditions (55 °C and 20% total solids) was investigated. A decreasing sequence of six HRTs, from 2.9 to 0.8-days, was performed to evaluate the stability of the system and the influence of HRT on the organic matter solubilization, the daily hydrogen production (HP) and the specific hydrogen production (SHP). Best results were obtained operating at 1.2-days HRT: HP of 3.67 L H2/Lreactor/day, SHP of 33.8 mL H2/gVSadded and hydrogen percentage in biogas of 52.4%. However, HRTs lower than 1.2-days induce failure in the system due to an unbalance of the hydrolytic phase. This fact was corroborated through the evaluation of two indirect parameters, “non-solubilized carbon” (NSC) and “acidogenic substrate as carbon” (ASC), and the relationships of NSC/TOC and ASC/TOC. PB Elsevier SN 0960-8524 YR 2017 FD 2017-06-12 LK http://hdl.handle.net/10498/29758 UL http://hdl.handle.net/10498/29758 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 11-nov-2026