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Relationship analysis of anaerobic fermentation parameters exposed to elevated chromium (VI)
Author(s) -
Zhang Huayong,
Han Xiaoxi,
Tian Yonglan,
Xu Yanli,
Li Ying,
Chai Yang,
Xu Xiang,
Sanganyado Edmond
Publication year - 2019
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.13212
Subject(s) - fermentation , anaerobic exercise , chemistry , biogas , chromium , food science , biogas production , hexavalent chromium , anaerobic digestion , biology , methane , organic chemistry , physiology , ecology
Heavy metals may affect anaerobic fermentation processes, which could result in variations in anaerobic fermentation parameters. In the present study, the impact of changing hexavalent chromium (Cr 6+ ) concentrations on different anaerobic fermentation parameters was investigated. The results showed that adding Cr 6+ affected fermentation efficiency since it elicited changes in enzyme activity as well as metabolic pathways. Adding Cr 6+ (30 mg/L) resulted in significant positive correlation between coenzyme F 420 activities, CH 4 contents, and cumulative biogas yields. The results suggested Cr 6+ enhanced biogas production by promoting the activity of coenzyme F 420 . Increasing the concentration of Cr 6+ to 100 mg/L resulted in a significant correlation ( P < 0.01) between the CH 4 contents and cumulative biogas yields and oxidation–reduction potential and pH. At high concentrations, Cr 6+ (500 mg/L) elicited parametric relationships dissimilar to those obtained using low Cr 6+ concentrations, particularly on the hydrolysis stage. This study comprehensively demonstrated the influence of Cr 6+ stress during the anaerobic fermentation process from a new insight and could provide critical references for further experimental design and data monitoring investigations. © 2019 American Institute of Chemical Engineers Environ Prog, 38: e13212, 2019