 Strategy of adjusting recirculation ratio for biohythane production via recirculated temperature-phased anaerobic digestion of food wasteYu Qin, Jing Wu, Benyi Xiao, Ming Cong, Toshimasa Hojo, Jun Cheng and Yu-You Li Energy, 2019, vol. 179, issue C, 1235-1245 Abstract: The stable H2 production is the important link in the anaerobic biohythane fermentation. In order to address the key parameters for the stable H2 production in the recirculated temperature-phased anaerobic digestion (R-TPAD) system, a critical strategy was proposed to adjust the recirculation ratio (R). The adjusting strategy was examined on a lab-scale R-TPAD system. The R-TPAD system was started up and operated with R = 1. Another system without recirculation (R = 0) was also operated as the control system. By narrowing the probable range from 0 < R < 1, the value of R = 0.4 was obtained for stable biohythane production from R-TPAD system. The harvested R-TPAD process achieved the volatile solids removal of 84.8% and the biohythane yield of 475 L/kg-VSfed with the H2 content of 10.5%, where the H2 yield efficiency was 248.0 mL-H2/CODremoved. The success of operating R-TPAD was attributed to the proposed strategy, which used the tendency of existing CH4 and the pH above 4.0 as the critical indicators for the stable H2 production. Keywords: Hythane; Hydrogen; Temperature-phased anaerobic digestion; Recirculation ratio; Food waste; Methane (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:179:y:2019:i:c:p:1235-1245 DOI: 10.1016/j.energy.2019.04.182 Access Statistics for this article Energy is currently edited by Henrik Lund and Mark J. Kaiser More articles in Energy from Elsevier |
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