Influence of long-term organic and conventional fertilization on bacterial communities involved in bioelectricity produc
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ORIGINAL PAPER
Influence of long‑term organic and conventional fertilization on bacterial communities involved in bioelectricity production from paddy field‑microbial fuel cells Yoganathan Kamaraj1 · Ganesh Punamalai1 · Sivasubramani Kandasamy1 · Kolanjinathan Kasinathan1 Received: 14 February 2020 / Revised: 30 March 2020 / Accepted: 7 June 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
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. Keywords Plant–MFC · Conventional fertilization · Power density · Next generation sequencing · Geobacteraceae
Introduction With the constant acclivity in fuel price and also depletion of fossil fuels to a large level, the energy crisis is rising each year in the world. The emerging demand for an alternate fuel has resulted in wide-ranging research in discovering a potential, reusable and economical source for energy production. Microbial fuel cells (MFCs) are defined as devices that produce electric power from organic matter by using microorganisms, and possibly applicable to organic waste Communicated by Erko Stackebrandt. * Ganesh Punamalai [email protected] 1
Department of Microbiology, Faculty of Science, Annamalai University, Annamalai Nagar, Chidambaram, Tamilnadu 608002, India
treatment (Logan et al. 2006). Dual-chamber MFC was used to produce electricity from glucose and sucrose as a substrat
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