A study of the kinetics and the effect of trace elements on mixed anaerobic fermentative biogas production by ternary quadratic general rotary unitized design. Issue 1 (2nd January 2016)

• Record Type: Journal Article
• Authors: Zhang, Chenxiao; Lian, Jing; Jiang, Zongshan; Guo, Jianbo; Guo, Yankai; Gou, Chenye
• Is Part Of: Biotechnology, biotechnological equipment. Volume 30:Issue 1(2016)
• Page Start: 90
• Page End: 99
• Publication Date: 2016-01-02
• Subjects: Trace elements -- mixed anaerobic fermentation -- methane -- single-factor experiment -- ternary quadratic general rotary unitized design; Biotechnology -- Periodicals; Biotechnology -- Periodicals; Biotechnology -- instrumentation -- Periodicals; Periodicals; 660.605
• DOI: 10.1080/13102818.2015.1083886
• Languages: English
• ISSNs: 1310-2818

Abstract

ABSTRACT: In this study the effect of trace elements on methanogenesis was investigated during mixed anaerobic fermentation using a single-factor experiment in the present study. The most effective concentrations of Fe 0, Fe 2+, Co 2+ and Ni 2+ that were added were 1500, 250, 0.3 and 0.6 mg/L, respectively. The optimal trace element combination was 0.58 mg/L Ni 2+, 1200 mg/L Fe 0 and 0.34 mg/L Co 2+ by the ternary quadratic general rotary unitized design method. The degree of influence exerted by trace elements on the cumulative methane yields decreased in the order of Ni 2+, Fe 0 and Co 2+, and the maximum CH4 yield was 241.6 mL/g volatile solids (VS), according to a regression equation. The non-dissolved organic carbon hydrolytic process showed a good fit with the first-order kinetic model. The maximum value of CH4 was 312.87 mL/g VS. Compared to the control, the bioconversion efficiencies of CH4 and CO2 production increased by 36.76% and 74.50%, respectively, at the optimal trace element combination. The obtained results provide new knowledge for improvements in the efficiency of anaerobic fermentation biogas production.