Bacterial communities in a bioelectrochemical denitrification system: The effects of supplemental electron acceptors

Sanath Kondaveeti; Sang Hoon Lee; Hee Deung Park; Booki Min

doi:10.1016/j.watres.2013.12.023

Bacterial communities in a bioelectrochemical denitrification system: The effects of supplemental electron acceptors

Sanath Kondaveeti, Sang Hoon Lee, Hee Deung Park, Booki Min

School of Civil, Environmental and Architectural Engineering

Research output: Contribution to journal › Article › peer-review

125 Citations (Scopus)

Abstract

Electrochemical treatment of nitrate (NO₃^-), nitrite (NO₂^-) and mixtures of nitrate and nitrite was evaluated with microbial catalysts on a cathode in three different bioelectrochemical denitrification systems (BEDS). The removal rates and removal percentage of nitrogen (N) compounds varied during biotic and abiotic operations. The biotic cathode using NO₃^--N as an electron acceptor showed enhanced removal percentages (88%) compared to the operation with NO₂^--N (85%). The simultaneous reduction of NO₃^--N and NO₂^--N occurred in the operation with a mixture of N compounds. The bacterial diversity from the initial inoculum (return sludge) changed at the end of bioelectrochemical denitrification operation after 55 days. The microbial community composition was different depending on the type of electron acceptor. BEDS operation with NO₃^--N and NO₂^--N was enriched with Proteobacteria and Firmicutes respectively. BEDS with a mixture of N electron acceptors showed enrichment with Proteobacteria. There was no clear, distinct microbial community between the cathode biofilm and suspended biomass.

Original language	English
Pages (from-to)	25-36
Number of pages	12
Journal	Water Research
Volume	51
DOIs	https://doi.org/10.1016/j.watres.2013.12.023
Publication status	Published - 2014 Mar 15

Keywords

Biocathode
Bioelectrochemical system
Denitrification
Nitrate
Pyrosequencing

ASJC Scopus subject areas

Environmental Engineering
Civil and Structural Engineering
Ecological Modelling
Water Science and Technology
Waste Management and Disposal
Pollution

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10.1016/j.watres.2013.12.023

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title = "Bacterial communities in a bioelectrochemical denitrification system: The effects of supplemental electron acceptors",

abstract = "Electrochemical treatment of nitrate (NO3-), nitrite (NO2-) and mixtures of nitrate and nitrite was evaluated with microbial catalysts on a cathode in three different bioelectrochemical denitrification systems (BEDS). The removal rates and removal percentage of nitrogen (N) compounds varied during biotic and abiotic operations. The biotic cathode using NO3--N as an electron acceptor showed enhanced removal percentages (88%) compared to the operation with NO2--N (85%). The simultaneous reduction of NO3--N and NO2--N occurred in the operation with a mixture of N compounds. The bacterial diversity from the initial inoculum (return sludge) changed at the end of bioelectrochemical denitrification operation after 55 days. The microbial community composition was different depending on the type of electron acceptor. BEDS operation with NO3--N and NO2--N was enriched with Proteobacteria and Firmicutes respectively. BEDS with a mixture of N electron acceptors showed enrichment with Proteobacteria. There was no clear, distinct microbial community between the cathode biofilm and suspended biomass.",

keywords = "Biocathode, Bioelectrochemical system, Denitrification, Nitrate, Pyrosequencing",

author = "Sanath Kondaveeti and Lee, {Sang Hoon} and Park, {Hee Deung} and Booki Min",

note = "Funding Information: The authors would like to thank Na Li and Ramesh Kakarla for their help during sampling. This study was funded by a National Research Foundation of Korea Grant (No 2010-0003940 , No 2012R1A1A 2042031 ) and by the Korea Ministry of Environment (Projects for Developing Eco-Innovation Technologies: GT-11-B-02-003-3), respectively. ",

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doi = "10.1016/j.watres.2013.12.023",

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journal = "Water Research",

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TY - JOUR

T1 - Bacterial communities in a bioelectrochemical denitrification system

T2 - The effects of supplemental electron acceptors

AU - Kondaveeti, Sanath

AU - Lee, Sang Hoon

AU - Park, Hee Deung

AU - Min, Booki

N1 - Funding Information: The authors would like to thank Na Li and Ramesh Kakarla for their help during sampling. This study was funded by a National Research Foundation of Korea Grant (No 2010-0003940 , No 2012R1A1A 2042031 ) and by the Korea Ministry of Environment (Projects for Developing Eco-Innovation Technologies: GT-11-B-02-003-3), respectively.

PY - 2014/3/15

Y1 - 2014/3/15

N2 - Electrochemical treatment of nitrate (NO3-), nitrite (NO2-) and mixtures of nitrate and nitrite was evaluated with microbial catalysts on a cathode in three different bioelectrochemical denitrification systems (BEDS). The removal rates and removal percentage of nitrogen (N) compounds varied during biotic and abiotic operations. The biotic cathode using NO3--N as an electron acceptor showed enhanced removal percentages (88%) compared to the operation with NO2--N (85%). The simultaneous reduction of NO3--N and NO2--N occurred in the operation with a mixture of N compounds. The bacterial diversity from the initial inoculum (return sludge) changed at the end of bioelectrochemical denitrification operation after 55 days. The microbial community composition was different depending on the type of electron acceptor. BEDS operation with NO3--N and NO2--N was enriched with Proteobacteria and Firmicutes respectively. BEDS with a mixture of N electron acceptors showed enrichment with Proteobacteria. There was no clear, distinct microbial community between the cathode biofilm and suspended biomass.

AB - Electrochemical treatment of nitrate (NO3-), nitrite (NO2-) and mixtures of nitrate and nitrite was evaluated with microbial catalysts on a cathode in three different bioelectrochemical denitrification systems (BEDS). The removal rates and removal percentage of nitrogen (N) compounds varied during biotic and abiotic operations. The biotic cathode using NO3--N as an electron acceptor showed enhanced removal percentages (88%) compared to the operation with NO2--N (85%). The simultaneous reduction of NO3--N and NO2--N occurred in the operation with a mixture of N compounds. The bacterial diversity from the initial inoculum (return sludge) changed at the end of bioelectrochemical denitrification operation after 55 days. The microbial community composition was different depending on the type of electron acceptor. BEDS operation with NO3--N and NO2--N was enriched with Proteobacteria and Firmicutes respectively. BEDS with a mixture of N electron acceptors showed enrichment with Proteobacteria. There was no clear, distinct microbial community between the cathode biofilm and suspended biomass.

KW - Biocathode

KW - Bioelectrochemical system

KW - Denitrification

KW - Nitrate

KW - Pyrosequencing

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Bacterial communities in a bioelectrochemical denitrification system: The effects of supplemental electron acceptors

Abstract

Keywords

ASJC Scopus subject areas

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