Biofilm metagenomic characteristics behind high coulombic efficiency for propanethiol deodorization in two-phase partitioning microbial fuel cell

Roles of Biofilm Structure and Functional Genes in Overcoming Limited Dimethyl Sulfide Degradation and Energy Recovery

“…27 To that end, a two-phase partitioning microbial fuel cell was designed, which degraded 500 mg L −1 propanethiol completely within 32 h and attained a power density of 142.5 mW m −2 . 1 In conjunction with these efforts, both the mass transfer and degradation procedures were accelerated to yield sufficient rates of bioreactions and energy generation. 28 With the rise of different strategies for MFCs enhancement, the underlying mechanism of the strengthening effect needed to be clarified; otherwise, limited suggestions can be made for further system development.…”

“…Volatile organic sulfur compounds (VOSCs), such as dimethyl sulfide (DMS), methanethiol (MT), and dimethyl disulfide (DMDS), significantly contributed to the generation of malodors in bodies of water due to their low olfactory threshold and high odor intensity. − In fact, VOSCs existed in all the stages of wastewater treatment, which may give rise to localized water issues. , To meet the demand of waste gas odor control, biodegradation technologies, including biofilters, biotrickling filters, and bioscrubbers, have been widely recognized for their environmental friendliness and high cost-effectiveness. , Among different biodegradation processes, the microbial fuel cells (MFCs) are known to eliminate organic pollutants and generate electrical energy simultaneously, taking advantage of biocatalysts in the bioanode. , For VOSCs degradation, several dual-chamber MFCs had been developed. Nonetheless, due to the toxicity of VOSCs to microorganisms, the power density was found to be rather limited. , The challenges on refractory VOSCs removal and fast energy generation in MFCs remain to be addressed. , …”

“…On the other hand, as the MFCs were a kind of complex system with dual chambers, the reactor configuration can be optimized whole or partially to regulate the liquid and gas (if appliable) flows and reaction condition parameters . To that end, a two-phase partitioning microbial fuel cell was designed, which degraded 500 mg L –1 propanethiol completely within 32 h and attained a power density of 142.5 mW m –2 . In conjunction with these efforts, both the mass transfer and degradation procedures were accelerated to yield sufficient rates of bioreactions and energy generation …”