Abstract：
:Weak magnetic field (WMF) provided by a magnet was proposed to enhance CH4 production from a swine manure-fed digester supplemented with micron-sized zero valent iron (ZVI). Compared to the control without ZVI addition and WMF application (RControl), treatments that included ZVI only (RZVI) and coupled WMF with ZVI (RZVI/WMF) increased the CH4 production by 77.0% and 124.5%, respectively. As evidenced by the elevated levels of total soluble iron, WMF apparently promoted the corrosion of ZVI, providing extra H2 for hydrogenotrophic methanogenesis and creating a more reductive environment to reduce propionic-type fermentation. Microbial analysis results revealed that the relative abundance of Methanothrix (capable of accepting electrons) in RZVI/WMF were 75.1% higher than that in RZVI. Essentially, WMF application promoted the direct interspecies electron transfer-based methanogenesis by (1) providing more electrons as the direct substrate, and (2) inducing Lorentz force to facilitate the mass transfer between the released electrons and the methanogens.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Huang W,Yang F,Huang W,Wang D,Lei Z,Zhang Zdoi
10.1016/j.biortech.2019.03.013subject
Has Abstractpub_date
2019-06-01 00:00:00pages
202-210eissn
0960-8524issn
1873-2976pii
S0960-8524(19)30359-1journal_volume
282pub_type
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