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Influence of long-term organic and conventional fertilization on bacterial communities involved in bioelectricity production from paddy field-microbial fuel cells.

Abstract：

:Soils are rich in organics, particularly those that support the growth of plants. These organics are possible sources of sustainable energy, and a microbial fuel cell (MFC) system can potentially be used for this purpose. In this, the soil organic content expelled from plant root was possibly converted into electrical energy through the microbial metabolic process. The integration of MFC systems with living plant root system is a novel approach, which will facilitate sustainable resource for energy production. Therefore, the objective of this study is to electrochemically evaluate the paddy field MFCs (PF-MFCs) performance and methane emission under organic and conventional fertilization systems in paddy fields, and its impact on bacterial communities involved in bioelectricity production. Graphite (anode) and carbon (cathode) electrode MFC systems were configured and assembled in organic and conventionally fertilized paddy fields. The anode and bulk soil-associated bacterial communities were examined using high-throughput Illumina MiSeq sequencing platform. Our results revealed that the maximum electricity production and power density were observed in CFPF-MFC with less methane emission compared to OFPF-MFC. The next-generation sequencing (NGS) libraries showed that the bacterial population was significantly increased in the organic-fertilized field and the enhanced occurrence of the Geobacteraceae family in CFPF-MFC anode. By enhancing Geobacteraceae occurrence on the anode, the conventional fertilization improved the bioelectricity production with less methane emission. Further extension in the establishment of plant MFCs in various sedimentary environments will solve the global energy crisis.

journal_name

Arch Microbiol

journal_title

Archives of microbiology

authors

Kamaraj Y,Punamalai G,Kandasamy S,Kasinathan K

doi

10.1007/s00203-020-01947-3

subject

Has Abstract

pub_date

2020-10-01 00:00:00

pages

2279-2289

issue

eissn

0302-8933

issn

1432-072X

pii

10.1007/s00203-020-01947-3

journal_volume

202

pub_type

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Influence of long-term organic and conventional fertilization on bacterial communities involved in bioelectricity production from paddy field-microbial fuel cells.