Self-induced bioelectro-potential influence on sulfate removal and desalination in microbial fuel cell

被引：24
作者：
Hemalatha, Manupati [1 ,2 ]
Sravan, J. Shanthi [1 ,2 ]
Mohan, S. Venkata [1 ,2 ]
机构：
[1] CSIR Indian Inst Chem Technol CSIR IICT, Dept Energy & Environm Engn, Bioengn & Environm Sci Lab, Hyderabad 500007, India
[2] CSIR Indian Inst Chem Technol CSIR IICT Campus, Acad Sci & Innovat Res AcSIR, Hyderabad 500007, India
来源：
BIORESOURCE TECHNOLOGY | 2020年 / 309卷
关键词：
Ionic gradient; Produced water; Bioelectrochemical systems; Total dissolved solids (TDS); Exo-electrogenic bacteria; WASTE-WATER TREATMENT; REDUCING BACTERIA; SULFIDE; SULFUR; SYSTEM; ELECTROFERMENTATION; REDUCTION; RECOVERY;
D O I：
10.1016/j.biortech.2020.123326
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
This study focused on treatment of sulfate-rich produced water (PW) using microbial fuel cell (MFC) with biotic anode (bAC) and abiotic cathode (aCC) separated by a cation exchange membrane (CEM). MFC was operated under varied circuitry modes open circuit (OC-without resistance) and closed circuit (CC-applied resistance (1k Omega)) to evaluate and assess the removal of sulfates and salts with simultaneous carbon utilization. The OC and CC operations depicted sulfates removal efficiency of 38% and 56%, salinity removal of 12% and 21% and COD removal of 47% and 58%, respectively. Both OC and CC showed K+ decrement in bAC and increment in aCC with a comparatively higher efficiency of ionic mobility in CC operation. Maximum open circuit voltage (OCV) of 498 mV (OC) was observed with redox catalytic peak currents from cyclic voltammetry [Anode/cathode, 3.5/ -4.9 mA (OC); 6.9/-7.9 mA (CC)]. Dominance of Proteobacteria and Actinobacteria with specific enrichment of sulfate reducing bacteria (SRB) and halophiles was observed in bAC at the end of operation.
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页数：9
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