Abstract：
:Fe is widely used as an additive in anaerobic digestion, but its bioavailability and the mechanism by which it enhances digestion are unclear. In this study, sequential extraction was used to measure Fe bioavailability, while biochemical parameters, kinetics model and Q-PCR (fluorescence quantitative PCR) were used to explore its mechanism of stimulation. The results showed that sequential extraction is a suitable method to assess the anaerobic system bioavailability of Fe, which is low and fluctuates to a limited extent (1.7 to -3.1wt%), indicating that it would be easy for Fe levels to be insufficient. Methane yield increased when the added Fe2+ was 10-500mg/L. Appropriate amounts of Fe2+ accelerated the decomposition of rice straw and facilitated methanogen metabolism, thereby improving reactor performance. The modified Gompertz model better fitted the results than the first-order kinetic model. Feasibility analysis showed that addition of Fe2+ at ≤50mg/L was suitable.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Cai Y,Zhao X,Zhao Y,Wang H,Yuan X,Zhu W,Cui Z,Wang Xdoi
10.1016/j.biortech.2017.07.151subject
Has Abstractpub_date
2018-02-01 00:00:00pages
163-170eissn
0960-8524issn
1873-2976pii
S0960-8524(17)31267-1journal_volume
250pub_type
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