Bioelectrode-based approach for enhancing nitrate and nitrite removal and electricity generation from eutrophic lakes

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Bioelectrode-based approach for enhancing nitrate and nitrite removal and electricity generation from eutrophic lakes. / Zhang, Yifeng; Angelidaki, Irini.

In: Water Research, Vol. 46, No. 19, 2012, p. 6445-6453.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Zhang, Yifeng; Angelidaki, Irini / Bioelectrode-based approach for enhancing nitrate and nitrite removal and electricity generation from eutrophic lakes.

In: Water Research, Vol. 46, No. 19, 2012, p. 6445-6453.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{262e8bffbfde472aa1586a13ea903ee0,
title = "Bioelectrode-based approach for enhancing nitrate and nitrite removal and electricity generation from eutrophic lakes",
publisher = "Pergamon",
author = "Yifeng Zhang and Irini Angelidaki",
year = "2012",
doi = "10.1016/j.watres.2012.09.022",
volume = "46",
number = "19",
pages = "6445--6453",
journal = "Water Research",
issn = "0043-1354",

}

RIS

TY - JOUR

T1 - Bioelectrode-based approach for enhancing nitrate and nitrite removal and electricity generation from eutrophic lakes

A1 - Zhang,Yifeng

A1 - Angelidaki,Irini

AU - Zhang,Yifeng

AU - Angelidaki,Irini

PB - Pergamon

PY - 2012

Y1 - 2012

N2 - Nitrate and nitrite contamination of surface waters (e.g. lakes) has become a severe environmental and health problem, especially in developing countries. The recent demonstration of nitrate reduction at the cathode of microbial fuel cell (MFC) provides an opportunity to develop a new technology for nitrogen removal from surface waters. In this study, a sediment-type MFC based on two pieces of bioelectrodes was employed as a novel in situ applicable approach for nitrogen removal, as well as electricity production from eutrophic lakes. Maximum power density of 42 and 36 mW/m2 were produced respectively from nitrate- and nitrite-rich synthetic lake waters at initial concentration of 10 mg-N/L. Along with the electricity production a total nitrogen removal of 62% and 77% was accomplished, for nitrate and nitrite, respectively. The nitrogen removal was almost 4 times higher under close-circuit condition with biocathode, compared to either the open-circuit operation or with abiotic cathode. The mass balance on nitrogen indicates that most of the removed nitrate and nitrite (84.7±0.1% and 81.8±0.1%, respectively) was reduced to nitrogen gas. The nitrogen removal and power generation was limited by the dissolved oxygen (DO) level in the water and acetate level injected to the sediment. Excessive oxygen resulted in dramatically decrease of nitrogen removal efficiency and only 7.8% removal was obtained at DO level of 7.8 mg/l. The power generation and nitrogen removal increased with acetate level and was nearly saturated at 0.84 mg/g-sediment. This bioelectrode-based in situ approach is attractive not only due to the electricity production, but also due to no need of extra reactor construction, which may broaden the application possibilities of sediment MFC technology.

AB - Nitrate and nitrite contamination of surface waters (e.g. lakes) has become a severe environmental and health problem, especially in developing countries. The recent demonstration of nitrate reduction at the cathode of microbial fuel cell (MFC) provides an opportunity to develop a new technology for nitrogen removal from surface waters. In this study, a sediment-type MFC based on two pieces of bioelectrodes was employed as a novel in situ applicable approach for nitrogen removal, as well as electricity production from eutrophic lakes. Maximum power density of 42 and 36 mW/m2 were produced respectively from nitrate- and nitrite-rich synthetic lake waters at initial concentration of 10 mg-N/L. Along with the electricity production a total nitrogen removal of 62% and 77% was accomplished, for nitrate and nitrite, respectively. The nitrogen removal was almost 4 times higher under close-circuit condition with biocathode, compared to either the open-circuit operation or with abiotic cathode. The mass balance on nitrogen indicates that most of the removed nitrate and nitrite (84.7±0.1% and 81.8±0.1%, respectively) was reduced to nitrogen gas. The nitrogen removal and power generation was limited by the dissolved oxygen (DO) level in the water and acetate level injected to the sediment. Excessive oxygen resulted in dramatically decrease of nitrogen removal efficiency and only 7.8% removal was obtained at DO level of 7.8 mg/l. The power generation and nitrogen removal increased with acetate level and was nearly saturated at 0.84 mg/g-sediment. This bioelectrode-based in situ approach is attractive not only due to the electricity production, but also due to no need of extra reactor construction, which may broaden the application possibilities of sediment MFC technology.

KW - Bioelectrode

KW - Sediment microbial fuel cell

KW - Eutrophic lakes

KW - In situ bioremediation

KW - Nitrate and nitrite removel

KW - Power generation

U2 - 10.1016/j.watres.2012.09.022

DO - 10.1016/j.watres.2012.09.022

JO - Water Research

JF - Water Research

SN - 0043-1354

IS - 19

VL - 46

SP - 6445

EP - 6453

ER -