vinay patel

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Fundamentals of Biosensor Application in Environmental Pollutant Monitoring

Removal of Emerging Contaminants Through Microbial Processes, 2020

Population explosion and rapid industrialization have led to increase in concentration of polluta... more Population explosion and rapid industrialization have led to increase in concentration of pollutants posing threat to the environment. Therefore, it is essential to detect and reduce the level of pollutants, to conserve our natural habitat and protect the environment from further degradation. Biosensors offer a solution as analytical devices that can be customized to detect a variety of pollutants. It comprises of three essential parts-bioreceptor, transducer, and data transfer and processing. The biosensing devices have a biological component: the bioreceptor, which is biological in origin and may comprise of whole cells, cell-based receptors, enzymes, antibodies, or nucleic acids. These biological components provide advantages like detection of pollutant in low amounts, high specificity, and precision. This chapter focuses on biosensors, their types, and principles as well as recent advancements in the field.

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Solid State Sensors for Hydrogen Peroxide Detection

Biosensors, 2020

Hydrogen peroxide (H2O2) is a key molecule in numerous physiological, industrial, and environment... more Hydrogen peroxide (H2O2) is a key molecule in numerous physiological, industrial, and environmental processes. H2O2 is monitored using various methods like colorimetry, luminescence, fluorescence, and electrochemical methods. Here, we aim to provide a comprehensive review of solid state sensors to monitor H2O2. The review covers three categories of sensors: chemiresistive, conductometric, and field effect transistors. A brief description of the sensing mechanisms of these sensors has been provided. All three sensor types are evaluated based on the sensing parameters like sensitivity, limit of detection, measuring range and response time. We highlight those sensors which have advanced the field by using innovative materials or sensor fabrication techniques. Finally, we discuss the limitations of current solid state sensors and the future directions for research and development in this exciting area.

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Basics of Methanogenesis in Anaerobic Digester

Microbial Applications Vol.2, 2017

The field of wastewater management and alternative energy are one of the most unexplored fields o... more The field of wastewater management and alternative energy are one of the most unexplored fields of environmental biotechnology. The biomethane is considered as renewable natural gas which can be derived from organic waste and sewage treatment. In recent past biomethane is emerging as a promising gaseous fuel utilized in a cogeneration or trigeneration power plant. Biomethane usually produced through anaerobic digestion in oxygen-deficient environment where a series of microorganisms convert the complex waste to biogas via liquefaction through a cascade of enzymes. Biomethane produced in anaerobic digester can be utilized for decentralized power generation, and additionally revenue can be gained in the form of a CO2 credits and/or other greenhouse gas emission credits. In the present book chapter, the technical know-how of anaerobic digestion and biocatalyst associated with digester has been depicted. A thorough understanding of the fundamental principles of anaerobic digestion would help to perceive new aspects of bioenergy conversions. The book chapter highlights the concise of biochemistry for biomethane production as well as important major factors involved in the process toward the realization of a stable biomethane-based economy. Successful application of anaerobic digester was found in pilot-scale potential wastewater treatment along with renewable energy production. The proper configuration anaerobic digester and efficiently pretreated “feedstock” are key to maximize the production of methane. Therefore, basics of reactor design designs based on process economy have been discussed.

Wastewater as anolyte for bioelectricity generation in graphite granule anode single chambered microbial fuel cell: effect of current collector

International Journal of Environmental Technology and Management, 2014

Single chambered microbial fuel cell (sMFC) could be used for wastewater treatment as well as to ... more Single chambered microbial fuel cell (sMFC) could be used for wastewater treatment as well as to generate electricity. Bioelectrochemical treatment of synthetic acetate based wastewater with simultaneous power generation was studied in tubular type air cathode sMFC. In order to improve the efficacy of MFC, three different anodic systems were considered such as graphite granules with graphite rod as anodic current collector (GGR), graphite granules packed in stainless steel (SS-304) sock net as current collector (GGSN) and graphite plate (GP) as anode. Highest power densities of 1.59 W/m 3 and 2.03 W/m 3 at the maximum current density of 5.86 A/m 3 and 7.56 A/m 3 were obtained using GGR-sMFC and GGSN-sMFC, respectively. CE was found 36% higher in GGSN-sMFC as compared to GGR-sMFC. Exchange current density and Tafel constant of different anode materials were calculated. The present study revealed that current collector might play an important role in improving power generation and CE.

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Facile fabrication of conductive MoS2 thin films by sonication in hot water and evaluation of their electrocatalytic performance in the hydrogen evolution reaction

Nanoscale Advances, 2021

Molybdenum disulfide (MoS2) has long been used in catalysis and is a promising material for energ... more

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Wastewater as anolyte for bioelectricity generation in graphite granule anode single chambered microbial fuel cell: Effect of current collector

by vinay patel and Soumya Pandit

Single chambered microbial fuel cell (sMFC) could be used for wastewater treatment as well as to ... more Single chambered microbial fuel cell (sMFC) could be used for wastewater treatment as well as to generate electricity. Bioelectrochemical treatment of synthetic acetate based wastewater with simultaneous power generation was studied in tubular type air cathode sMFC. In order to improve the efficacy of MFC, three different anodic systems were considered such as graphite granules with graphite rod as anodic current collector (GGR), graphite granules packed in stainless steel (SS-304) sock net as current collector (GGSN) and graphite plate (GP) as anode. Highest power densities of 1.59 W/m³ and 2.03 W/m³ at the maximum current density of 5.86 A/m³ and 7.56 A/m³ were obtained using GGR-sMFC and GGSN-sMFC, respectively. CE was found 36% higher in GGSN-sMFC as compared to GGR-sMFC. Exchange current density and Tafel constant of different anode materials were calculated. The present study revealed that current collector might play an important role in improving power generation and CE.

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