Effect of anaerobic sludge on the bioelectricity generation enhancement of bufferless single-chamber microbial fuel cells

被引：9

作者：

Lv, Ying ^{[1
]}

Wang, Yue ^{[1
]}

Ren, Yueping ^{[1
,2
]}

Li, Xiufen ^{[1
,3
]}

Wang, Xinhua ^{[1
]}

Li, Jian ^{[1
]}

机构：

[1] Jiangnan Univ, Sch Environm & Civil Engn, Jiangsu Key Lab Anaerob Biotechnol, Wuxi 214122, Jiangsu, Peoples R China

[2] State Key Lab Pollut Control & Resource Reuse, Nanjing, Jiangsu, Peoples R China

[3] Jiangsu Cooperat Innovat Ctr Technol & Mat Water, Suzhou, Peoples R China

来源：

BIOELECTROCHEMISTRY | 2020年 / 131卷

关键词：

Bufferless microbial fuel cells (BLMFCs); Inorganic carbon (IC); Anolyte acidification; Endogenous buffer; Anaerobic sludge; AIR-CATHODE; ACTIVATED CARBON; PERFORMANCE; REMOVAL; BIOFILM; LAYER;

D O I：

10.1016/j.bioelechem.2019.107387

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Enhancing the self-buffering capacity is critical in the operation of bufferless microbial fuel cells (BLMFCs). Inorganic carbon (IC) is an ideal endogenous buffer, but its spontaneously accumulated concentration is insufficient to adjust anolyte pH. In this study. BLMFCs were operated with anaerobic sludge to enhance IC accumulation and increase anolyte pH. The accumulated IC concentration during a single running cyde was elevated from 8.3 mM to 12.5 mM, and anolyte pH remained above 7.5. The electric power output was significantly promoted from 3322 mW.m(-2) to 628.1 mW.m(-2) , and the coulombic efficiency (CE) slightly increased from 16.4% to 19.5%. Geobacter was the electro-active genus in the anode biolilms of the MFCs, and its relative abundance in the KCl-S anode biofilm increased from 0.2% to 5.75%. After continuous operation, the predominant genus of the anaerobic sludge had changed from Flavobacterium to Fusibacter. (C) 2019 Elsevier B.V. All rights reserved.

引用

页数：8

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