title: Enhancement of biohydrogen production from brewers' spent grain by calcined-red mud pretreatment.
abstract: This paper investigated the utilization of calcined-red mud (CRM) pretreatment to enhance fermentative hydrogen yields from brewers' spent grain (BSG). The BSG samples were treated with different concentrations (0.0-20g/L) of CRM at 55°C for 48h, before the biohydrogen process with heat-treated anaerobic sludge inoculum. The highest specific hydrogen production of 198.62ml/g-VS was obtained from the BSG treated with 10g/L CRM, with the corresponding lag time of 10.60h. Hydrogen yield increments increased by 67.74%, compared to the control tests without CRM. The results demonstrated that the CRM could hydrolyze more cellulose and further provided adequate broth and suitable pH value for efficient fermentative hydrogen. The model-based analysis showed that the modified Gompertz model presented a better fit for the experimental data than the first-order model.
authors.affiliation: School of Environmental Science and Engineering, Qilu University of Technology, Jinan 250353, China; Key Laboratory of Cleaner Production and Industrial Wastes Recycling and Resourcization in Universities of Shandong, Jinan 250353, China. Electronic address: lyzhangjishi@163.com.
authors.forename: Jishi
authors.initials: J
authors.lastname: Zhang
authors.affiliation: School of Environmental Science and Engineering, Qilu University of Technology, Jinan 250353, China; Key Laboratory of Cleaner Production and Industrial Wastes Recycling and Resourcization in Universities of Shandong, Jinan 250353, China.
authors.forename: Lihua
authors.initials: L
authors.lastname: Zang
mesh_terms: D056804:Biofuels; D002482:Cellulose / Q000378:metabolism; D003246:Conservation of Energy Resources; D002523:Edible Grain / Q000378:metabolism*; D005285:Fermentation; D006859:Hydrogen / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D012722:Sewage; D012995:Solubility
chemical_list: D056804:Biofuels; D012722:Sewage; D006859:Hydrogen; D002482:Cellulose
keywords: Brewers’ spent grain; Calcined-red mud pretreatment; Fermentation kinetics; Hydrogen production; Solubilization