Abstract：
:In this work, a single microbial electrochemical system was developed for multiple goals simultaneously - CO2 reduction, biogas purification, upgrading and sulfur recovery. This system consists of a methanogen-inoculated biocathode for CO2 reduction and a ferrous ion (Fe2+)-mediated abiotic anode for hydrogen sulfide (H2S) oxidation. In the cathodic chamber, methane production rate of 20.6 ± 1.0 μmol·h-1 and high upgrading level (up to 98.3% methane content) were achieved. In the anodic chamber, H2S was completely removed and selectively converted into elemental sulfur particles. The system showed stable performance during continuous operation for treating both pure CO2 and mixed gases, with a cathodic coulombic efficiency of up to 85.2%. This simple system holds a great potential for practical application for biogas upgrading and sulfur recovery from waste water/gases.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Fu XZ,Li J,Pan XR,Huang L,Li CX,Cui S,Liu HQ,Tan ZL,Li WWdoi
10.1016/j.biortech.2019.122448subject
Has Abstractpub_date
2020-02-01 00:00:00pages
122448eissn
0960-8524issn
1873-2976pii
S0960-8524(19)31678-5journal_volume
297pub_type
杂志文章abstract：:In bioelectrochemical systems (BESs), electrons are transferred between electrochemically active microbes (EAMs) and conductive materials, such as electrodes, via extracellular electron transfer (EET) pathways, and electrons thus transferred stimulate intracellular catabolic reactions. Catabolic and EET pathways have ...
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