Coupling process and mechanism of methanol oxidation and nitrate reduction in an anodic denitrification microbial fuel cell(AD-MFC)

ZHANG Jiqiang; ZHENG Ping; ZHANG Meng; LI Wei; CHEN Hui; CAI Chen; XIE Zuofu

doi:10.3969/j.issn.0438-1157.2013.09.044

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Coupling process and mechanism of methanol oxidation and nitrate reduction in an anodic denitrification microbial fuel cell(AD-MFC)

更新时间：2025-12-10

- Coupling process and mechanism of methanol oxidation and nitrate reduction in an anodic denitrification microbial fuel cell(AD-MFC)
- CIESC Journal Issue 9, Pages: 3404-3411(2013)
- 作者机构：
  
  1. 浙江大学环境工程系,浙江,杭州,310058
  2. 浙江科技学院,浙江,杭州,310023
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.09.044
  CLC： 703.1
- Online First：05 September 2013，
  
  Published：05 September 2013
- 稿件说明：
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ZHANG Jiqiang, ZHENG Ping, ZHANG Meng, et al. Coupling process and mechanism of methanol oxidation and nitrate reduction in an anodic denitrification microbial fuel cell(AD-MFC)[J]. CIESC Journal, 2013, (9): 3404-3411.
DOI：

ZHANG Jiqiang, ZHENG Ping, ZHANG Meng, et al. Coupling process and mechanism of methanol oxidation and nitrate reduction in an anodic denitrification microbial fuel cell(AD-MFC)[J]. CIESC Journal, 2013, (9): 3404-3411. DOI： 10.3969/j.issn.0438-1157.2013.09.044.

摘要

在双室微生物燃料电池(MFC)阳极内接种反硝化细菌富集培养物

同时加入硝酸盐和甲醇

构建了阳极反硝化微生物燃料电池(AD-MFC)

并以批式操作研究了AD-MFC的反硝化产电性能。试验结果表明

在初始硝氮浓度为(100.22±0.62)mg·L-1

COD浓度为(500.40±1.67)mg·L-1的条件下

AD-MFC的最大容积NO3--N和COD去除速率分别达到0.31 kg N·m-3·d-1和1.06 kg COD·m-3·d-1

最大电压达到(602.80±5.42)mV

相应最大功率密度为(908.42±0.07)mW·m-3。AD-MFC的产电过程是甲醇氧化与硝酸盐还原的偶合过程

电压变化与反硝化作用密切相关

可用于指示反硝化进程。AD-MFC的电压曲线呈现降低-升高-再降低的三阶段特性

其原因是反硝化作用、甲醇降解作用和细胞水解发酵作用依次成为阳极液中的主导反应。

Abstract

An anodic denitrification MFC(AD-MFC)was constructed by inoculating denitrifying bacteria enrichment culture into anode chamber of a dual-chamber MFC

and its capacity of denitrification and electricity production was investigated with methanol as electron donor and nitrate as acceptor in a batch cultivation mode.When initial nitrate and COD concentration were (100.22±0.62)mg·L-1 and (500.40±1.67)mg·L-1

the volumetric nitrogen and COD removal rates reached 0.31 kg N·m-3·d-1 and 1.06 kg COD·m-3·d-1

respectively

coupled with the maximum voltage of (602.80±5.42)mV and the maximum power density of (908.42±0.07)mW·m-3.The results demonstrated that power generation in the AD-MFC was due to a coupling of methanol oxidation and nitrate reduction

and voltage changes were closely related to denitrification

indicating the course of denitrification.Voltage curves of the AD-MFC showed three-phase characteristics of descend phase

ascend phase and redescend phase

which could be ascribed to the succession of denitrification

methanol degradation and cell hydrolysate fermentation as dominant reaction in the anolyte.

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