<P><B>Abstract</B></P> <P>In this study, a practical bioelectrochemical anaerobic digestion (BEAD) reactor equipped with a rotating STS304 impeller was tested to verify its methane production performance. Methane product...
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https://www.riss.kr/link?id=A107739937
2018
-
SCOPUS,SCIE
학술저널
423-432(10쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P><B>Abstract</B></P> <P>In this study, a practical bioelectrochemical anaerobic digestion (BEAD) reactor equipped with a rotating STS304 impeller was tested to verify its methane production performance. Methane product...
<P><B>Abstract</B></P> <P>In this study, a practical bioelectrochemical anaerobic digestion (BEAD) reactor equipped with a rotating STS304 impeller was tested to verify its methane production performance. Methane production in the BEAD reactor was possible without accumulation of volatile fatty acids (VFAs) and decreases in pH at high organic loading rates (OLRs) up to 6 kg-COD/m<SUP>3</SUP>·d (COD: chemical oxygen demand). Methane production in a BEAD-O (open circuit) reactor was inhibited at OLRs above 4 kg-COD/m<SUP>3</SUP>·d; however, the performance could be recovered bioelectrochemically by supplying voltage. The population density of hydrogenotrophic methanogens increased to 73.3% in the BEAD-C (closed circuit) reactor, even at high OLRs, through the removal of VFAs and conversion of hydrogen to methane. The energy efficiency in the BEAD-C reactor was 85.6%, indicating that the commercialization of BEAD reactors equipped with rotating STS304 impeller electrodes is possible.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Rotating-anode bioelectrochemical anaerobic digestion (BEAD) reactor was devised. </LI> <LI> Stainless steel used as a cost-effective and durable electrode material. </LI> <LI> BEAD-C produced CH<SUB>4</SUB> without pH decrease or VFA accumulation at high OLRs. </LI> <LI> CH<SUB>4</SUB> production recovered in BEAD-O with supplied voltage at high OLRs. </LI> <LI> Voltage-induced hydrogenotrophic methanogenesis in BEAD-C gave stable CH<SUB>4</SUB> yields. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>