Department of Chemical Engineering and Food Technology, Faculty of Science, University of Cádiz - Institute of Viticulture and Agri-Food Research (IVAGRO) - International Campus of Excellence (ceiA3), 11510 Puerto Real, Cádiz, Spain.
Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, University of Cádiz - Institute of Viticulture and Agri-Food Research (IVAGRO) - International Campus of Excellence (ceiA3), 11510 Puerto Real, Cádiz, Spain.
Bioresour Technol. 2018 Jan;248(Pt A):174-179. doi: 10.1016/j.biortech.2017.05.195. Epub 2017 Jun 12.
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 3.67L H/L/day, SHP of 33.8mL H/gVS 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.
在干热条件（55°C 和 20%总固体）下，研究水力停留时间（HRT）对有机固体废物（OFMSW）和混合污泥（MS）共消化生物制氢的影响。进行了六个 HRT 从 2.9 到 0.8 天的递减序列，以评估系统的稳定性以及 HRT 对有机物溶解、每日产氢（HP）和比产氢（SHP）的影响。在 1.2 天 HRT 下操作时获得了最佳结果：HP 为 3.67L H/L/天，SHP 为 33.8mL H/gVS，沼气中氢气百分比为 52.4%。然而，低于 1.2 天的 HRT 会导致系统失衡，从而导致系统失效。通过评估两个间接参数“未溶解碳”（NSC）和“产酸基质作为碳”（ASC）以及 NSC/TOC 和 ASC/TOC 的关系，证实了这一事实。
