不同运行方式对微生物燃料电池处理氨氮废水的影响

doi:10.16085/j.issn.1000-6613.2016.05.043

化工进展 ›› 2016, Vol. 35 ›› Issue (05): 1549-1554.DOI: 10.16085/j.issn.1000-6613.2016.05.043

不同运行方式对微生物燃料电池处理氨氮废水的影响

赵慧敏^1,2, 赵剑强¹

1. 长安大学环境科学与工程学院, 陕西西安 710054;
2. 菏泽学院化学化工系, 山东菏泽 274015

收稿日期:2015-12-01 修回日期:2015-12-25 出版日期:2016-05-05 发布日期:2016-05-05
通讯作者: 赵剑强,教授,博士生导师,从事水污染控制工程研究。
作者简介:赵慧敏(1978-),女,博士研究生,讲师,主要从事水污染控制工程研究。E-mail zhmthreesister@163.com。
基金资助:
陕西省科技发展计划项目(2014K15-03-02)。

Influence of different operation modes on ammonia nitrogen wastewater treatment of microbial fuel cell

ZHAO Huimin^1,2, ZHAO Jianqiang¹

1. School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, Shaanxi, China;
2. Department of Chemistry and Chemical Engineering, Heze University, Heze 274015, Shandong, China

Received:2015-12-01 Revised:2015-12-25 Online:2016-05-05 Published:2016-05-05

摘要/Abstract

摘要： 微生物燃料电池(MFC)是一种既能去除污染物又能产电的新型污水处理技术,由于其具有利用生物转化能量的节能优势,MFC废水脱氮处理技术引起了更多的关注。本实验在启动MFC的同步硝化与反硝化(SND)后,首先研究了通路与断路条件对MFC产电脱氮的影响,结果表明:断路时有利于硝化反应的发生,氨氮去除率有最大值95.17%;而通路更有利于COD和总氮的去除,表明氮的去除主要依靠阴极接受电子进行。随后分析了曝气阶段+停曝阶段运行方式对MFC产电和脱氮的影响,结果显示:曝气8.5h(DO为4.0mg/L)后停止曝气,停曝阶段为11.5h,DO逐渐降低到2.0mg/L,输出电压由无曝气运行的31mV提高到120mV左右,氨氮去除率最高达到86.42%、总氮去除负荷由无曝气运行的0.064g/(L·d)升高到0.46g/(L·d)。说明曝气阶段+停曝阶段运行方式既能有效提高MFC脱氮产电性能又可以减少维持高浓度DO的能量输入。

关键词: 微生物燃料电池, 同步硝化与反硝化, 溶解氧, 总氮去除, 曝气

Abstract: Microbial fuel cell(MFC)is an innovative wastewater treatment technique for pollution remove and energy generation. Nitrogen removal using MFC is of great interest owing to the potential benefits of bioenergy production. In this study, simultaneous nitrification and denitrification in the cathode of MFC was investigated. The performance of MFC was influenced by operating methods. The experimental results demonstrated that maximum ammonia nitrogen removal rate was 95.17% under the condition of open circuit, which indicated that the open circuit is beneficial to nitrification while the closed circuit is more advantageous to COD and nitrogen removal, which showed that nitrogen removal depended mainly on accepting electron at cathode. The influence and mechanism of dissolved oxygen(DO) on the performance of nitrogen removal and electricity generation were investigated. The aeration-unaeration process was operated. The aeration lasted 8.5h at the beginning of the whole 20h experiment. The DO was gradually reduced from 4.0mg/L(aeration) to 2.0mg/L(unaeration). The results demonstrated that compared with the operation without aeration, the output voltage significantly increased from 31mV to 120mV and total nitrogen removal rate increased from 0.064g/(L·d) to 0.46g/(L·d). The ammonia nitrogen removal rate was 86.42%. This suggested that the aeration-unaeration process was an effective way to remove nitrogen, produce electricity and reduce the energy input to maintain high DO concentration.

Key words: microbial fuel cell, simultaneous nitrification and denitrification, dissolved oxygen, total nitrogen removal, aeration

中图分类号:

X703

赵慧敏, 赵剑强. 不同运行方式对微生物燃料电池处理氨氮废水的影响[J]. 化工进展, 2016, 35(05): 1549-1554.

ZHAO Huimin, ZHAO Jianqiang. Influence of different operation modes on ammonia nitrogen wastewater treatment of microbial fuel cell[J]. Chemical Industry and Engineering Progree, 2016, 35(05): 1549-1554.

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不同运行方式对微生物燃料电池处理氨氮废水的影响

Influence of different operation modes on ammonia nitrogen wastewater treatment of microbial fuel cell

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