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Ibrahim I, Salehmin MNI, Balachandran K, Hil Me MF, Loh KS, Abu Bakar MH, Jong BC, Lim SS. Role of microbial electrosynthesis system in CO 2 capture and conversion: a recent advancement toward cathode development. Front Microbiol 2023; 14:1192187. [PMID: 37520357 PMCID: PMC10379653 DOI: 10.3389/fmicb.2023.1192187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 06/26/2023] [Indexed: 08/01/2023] Open
Abstract
Microbial electrosynthesis (MES) is an emerging electrochemical technology currently being researched as a CO2 sequestration method to address climate change. MES can convert CO2 from pollution or waste materials into various carbon compounds with low energy requirements using electrogenic microbes as biocatalysts. However, the critical component in this technology, the cathode, still needs to perform more effectively than other conventional CO2 reduction methods because of poor selectivity, complex metabolism pathways of microbes, and high material cost. These characteristics lead to the weak interactions of microbes and cathode electrocatalytic activities. These approaches range from cathode modification using conventional engineering approaches to new fabrication methods. Aside from cathode development, the operating procedure also plays a critical function and strategy to optimize electrosynthesis production in reducing operating costs, such as hybridization and integration of MES. If this technology could be realized, it would offer a new way to utilize excess CO2 from industries and generate profitable commodities in the future to replace fossil fuel-derived products. In recent years, several potential approaches have been tested and studied to boost the capabilities of CO2-reducing bio-cathodes regarding surface morphology, current density, and biocompatibility, which would be further elaborated. This compilation aims to showcase that the achievements of MES have significantly improved and the future direction this is going with some recommendations. Highlights - MES approach in carbon sequestration using the biotic component.- The role of microbes as biocatalysts in MES and their metabolic pathways are discussed.- Methods and materials used to modify biocathode for enhancing CO2 reduction are presented.
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Affiliation(s)
- Irwan Ibrahim
- Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Malaysia
| | - Mohd Nur Ikhmal Salehmin
- Institute of Sustainable Energy (ISE), Universiti Tenaga Nasional (UNITEN), Putrajaya Campus, Kajang, Malaysia
| | | | | | - Kee Shyuan Loh
- Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Malaysia
| | | | - Bor Chyan Jong
- Agrotechnology and Bioscience Division, Malaysian Nuclear Agency, Kajang, Malaysia
| | - Swee Su Lim
- Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Malaysia
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Yaqoob AA, Al-Zaqri N, Alamzeb M, Hussain F, Oh SE, Umar K. Bioenergy Generation and Phenol Degradation through Microbial Fuel Cells Energized by Domestic Organic Waste. Molecules 2023; 28:molecules28114349. [PMID: 37298824 DOI: 10.3390/molecules28114349] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 05/23/2023] [Accepted: 05/24/2023] [Indexed: 06/12/2023] Open
Abstract
Microbial fuel cells (MFCs) seem to have emerged in recent years to degrade the organic pollutants from wastewater. The current research also focused on phenol biodegradation using MFCs. According to the US Environmental Protection Agency (EPA), phenol is a priority pollutant to remediate due to its potential adverse effects on human health. At the same time, the present study focused on the weakness of MFCs, which is the low generation of electrons due to the organic substrate. The present study used rotten rice as an organic substrate to empower the MFC's functional capacity to degrade the phenol while simultaneously generating bioenergy. In 19 days of operation, the phenol degradation efficiency was 70% at a current density of 17.10 mA/m2 and a voltage of 199 mV. The electrochemical analysis showed that the internal resistance was 312.58 Ω and the maximum specific capacitance value was 0.00020 F/g on day 30, which demonstrated mature biofilm production and its stability throughout the operation. The biofilm study and bacterial identification process revealed that the presence of conductive pili species (Bacillus genus) are the most dominant on the anode electrode. However, the present study also explained well the oxidation mechanism of rotten rice with phenol degradation. The most critical challenges for future recommendations are also enclosed in a separate section for the research community with concluding remarks.
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Affiliation(s)
- Asim Ali Yaqoob
- School of Chemical Sciences, Universiti Sains Malaysia, Minden 11800, Penang, Malaysia
| | - Nabil Al-Zaqri
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Muhammad Alamzeb
- Department of Chemistry, University of Kotli, Kotli 11100, Azad Jammu and Kashmir, Pakistan
| | - Fida Hussain
- Research Institute for Advanced Industrial Technology, College of Science and Technology, Korea University, Sejong 30019, Republic of Korea
| | - Sang-Eun Oh
- Department of Biological Environment, Kangwon National University, Chuncheon-si 24341, Republic of Korea
| | - Khalid Umar
- School of Chemical Sciences, Universiti Sains Malaysia, Minden 11800, Penang, Malaysia
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Li D, Feng Y, Li F, Tang J, Hua T. Carbon Fibers for Bioelectrochemical: Precursors, Bioelectrochemical System, and Biosensors. ADVANCED FIBER MATERIALS 2023; 5:699-730. [PMID: 36818429 PMCID: PMC9923679 DOI: 10.1007/s42765-023-00256-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 01/02/2023] [Indexed: 05/27/2023]
Abstract
Abstract Carbon fibers (CFs) demonstrate a range of excellent properties including (but not limited to) microscale diameter, high hardness, high strength, light weight, high chemical resistance, and high temperature resistance. Therefore, it is necessary to summarize the application market of CFs. CFs with good physical and chemical properties stand out among many materials. It is believed that highly fibrotic CFs will play a crucial role. This review first introduces the precursors of CFs, such as polyacrylonitrile, bitumen, and lignin. Then this review introduces CFs used in BESs, such as electrode materials and modification strategies of MFC, MEC, MDC, and other cells in a large space. Then, CFs in biosensors including enzyme sensor, DNA sensor, immune sensor and implantable sensor are summarized. Finally, we discuss briefly the challenges and research directions of CFs application in BESs, biosensors and more fields. Highlights CF is a new-generation reinforced fiber with high hardness and strength.Summary precursors from different sources of CFs and their preparation processes.Introduction of the application and modification methods of CFs in BESs and biosensor.Suggest the challenges in the application of CFs in the field of bio-electrochemistry.Propose the prospective research directions for CFs. Graphical abstract
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Affiliation(s)
- Donghao Li
- College of Environmental Science and Engineering, Nankai University, 38 Tongyan Road, Tianjin, 300350 China
- Key Laboratory of Pollution Process and Environmental Criteria, Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin, 300350 China
| | - Yimeng Feng
- College of Environmental Science and Engineering, Nankai University, 38 Tongyan Road, Tianjin, 300350 China
- Key Laboratory of Pollution Process and Environmental Criteria, Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin, 300350 China
| | - Fengxiang Li
- College of Environmental Science and Engineering, Nankai University, 38 Tongyan Road, Tianjin, 300350 China
- Key Laboratory of Pollution Process and Environmental Criteria, Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin, 300350 China
| | - Jingchun Tang
- College of Environmental Science and Engineering, Nankai University, 38 Tongyan Road, Tianjin, 300350 China
- Key Laboratory of Pollution Process and Environmental Criteria, Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin, 300350 China
| | - Tao Hua
- College of Environmental Science and Engineering, Nankai University, 38 Tongyan Road, Tianjin, 300350 China
- Key Laboratory of Pollution Process and Environmental Criteria, Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin, 300350 China
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Velvizhi G, Nair R, Goswami C, Arumugam SK, Shetti NP, Aminabhavi TM. Carbon credit reduction: A techno-economic analysis of "drop-in" fuel production. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 316:120507. [PMID: 36341830 DOI: 10.1016/j.envpol.2022.120507] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 10/07/2022] [Accepted: 10/19/2022] [Indexed: 06/16/2023]
Abstract
The current study elucidates the fundamentals of technical, financial, and environmental viability of the processes used for sustainable "drop-in" fuel generation. At present, the price of producing "drop-in" fuels is around two times as costly (5-6 USD/gallon) as the cost of fossil fuels (3 USD/gallon), especially when using second-generation feedstocks. Hence, this necessitates a comprehensive techno-economic understanding of the current technologies with respect to "drop-in"-fuel. This entitles technical-economic viability, and environmental sustainability to make the processes involved commercially viable. In this context, the present review addresses unique contrasts among the various processes involved in "drop-in" fuel production. Furthermore, principles and process flow of techno-economic analysis as well as environmental implications in terms of reduced carbon footprint and carbon credit are elucidated to discuss fundamentals of techno-economic analysis in terms of capital and operational expenditure, revenue, simulation, cash flow analysis, mass and energy balances with respect to evidence-based practices. Case specific techno-economic studies with current developments in this field of research with emphasis on software tools viz., Aspen Plus, Aspen HYSIS, Aspen Plus Economic Analyser (APEC) Aspen Icarus Process Evaluator (AIPE) are also highlighted. The study also emphasis on the carbon foot print of biofuels and its carbon credits (Carbon Offset Credits (COCs) and Carbon Reduction Credits (CRCs)) by leveraging a deep technical and robust business-oriented insights about the techno-economic analysis (TEA) exclusively for the biofuel production.
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Affiliation(s)
- G Velvizhi
- CO(2) Research and Green Technology Centre, Vellore Institute of Technology (VIT), Vellore, 632 014, India
| | - Rishika Nair
- CO(2) Research and Green Technology Centre, Vellore Institute of Technology (VIT), Vellore, 632 014, India
| | - Chandamita Goswami
- CO(2) Research and Green Technology Centre, Vellore Institute of Technology (VIT), Vellore, 632 014, India
| | | | - Nagaraj P Shetti
- Department of Chemistry, School of Advanced Sciences, KLE Technological University, Hubballi, 580 031, India; University Center for Research & Development (UCRD), Chandigarh University, Mohali, Punjab, 140413, India
| | - Tejraj M Aminabhavi
- Department of Chemistry, School of Advanced Sciences, KLE Technological University, Hubballi, 580 031, India; University Center for Research & Development (UCRD), Chandigarh University, Mohali, Punjab, 140413, India.
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Degradation of Hydroquinone Coupled with Energy Generation through Microbial Fuel Cells Energized by Organic Waste. Processes (Basel) 2022. [DOI: 10.3390/pr10102099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Microbial fuel cell (MFC) technology has captured the scientific community’s attention in recent years owing to its ability to directly transform organic waste into electricity through electrochemical processes. Currently, MFC systems faces a number of barriers, with one of the most significant being the lack of organic substrate to provide enough energy for bacterial growth and activity. In the current work, rotten rice was utilized as an organic substrate to boost bacterial activity to produce more energy and break down the organic pollutant hydroquinone in an effort to improve the performance of MFCs. There are only a few studies that considered the waste as an organic substrate and simultaneously degraded the organic pollutant vis-à-vis MFCs. The oxidation of glucose derived from rotten rice generated electrons that were transported to the anode surface and subsequently flowed through an external circuit to the cathode, where they were used to degrade the organic pollutant hydroquinone. The results were consistent with the MFC operation, where the 168-mV voltage was generated over the course of 29 days with a 1000 Ω external resistance. The maximum power and current densities were 1.068 mW/m2 and 123.684 mA/m2, respectively. The hydroquinone degradation was of 68%. For the degradation of organic pollutants and the production of energy, conductive pili-type bacteria such as Lacticaseibacillus, Pediococcus acidilactici and Secundilactobacillus silagincola species were identified during biological characterization. Future recommendations and concluding remarks are also included.
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Plekhanova YV, Rai M, Reshetilov AN. Nanomaterials in bioelectrochemical devices: on applications enhancing their positive effect. 3 Biotech 2022; 12:231. [PMID: 35996672 PMCID: PMC9391563 DOI: 10.1007/s13205-022-03260-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 07/17/2022] [Indexed: 11/01/2022] Open
Abstract
Electrochemical biosensors and biofuel cells are finding an ever-increasing practical application due to several advantages. Biosensors are miniature measuring devices, which can be used for on-the-spot analyses, with small assay times and sample volumes. Biofuel cells have dual benefits of environmental cleanup and electric energy generation. Application of nanomaterials in biosensor and biofuel-cell devices increases their functioning efficiency and expands spheres of use. This review discusses the potential of nanomaterials in improving the basic parameters of bioelectrochemical systems, including the sensitivity increase, detection lower-limit decrease, detection-range change, lifetime increase, substrate-specificity control. In most cases, the consideration of the role of nanomaterials links a certain type of nanomaterial with its effect on the bioelectrochemical device upon the whole. The review aims at assessing the effects of nanomaterials on particular analytical parameters of a biosensor/biofuel-cell bioelectrochemical device.
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Affiliation(s)
- Yulia V. Plekhanova
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino Center for Biological Research of the Russian Academy of Sciences, 142290 Pushchino, Russian Federation
| | - Mahendra Rai
- Nanobiotechnology Laboratory, Department of Biotechnology, Sant Gadge Baba Amravati University, Amravati, MH 444602 India
| | - Anatoly N. Reshetilov
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino Center for Biological Research of the Russian Academy of Sciences, 142290 Pushchino, Russian Federation
- Tula State University, 300012 Tula, Russian Federation
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Optical, electrochemical and photocatalytic properties of cobalt doped CsPbCl 3 nanostructures: a one-pot synthesis approach. Sci Rep 2021; 11:16473. [PMID: 34389751 PMCID: PMC8363650 DOI: 10.1038/s41598-021-95088-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 07/19/2021] [Indexed: 01/10/2023] Open
Abstract
The present manuscript aims at the synthesis of cesium based halide perovskite nanostructures and the effect of cobalt doping on the structural, optical, lumnisent, charge storage and photocatalytic properties. In a very first attempt, we report the solvothermal synthesis of Co doped CsPbCl3 nanostructures under subcritical conditions. The structural features were demonstrated by X-ray diffraction (XRD) Surface morphology determined cubic shape of the synthesized particles. Doping is an excellent way to modify the properties of host material in particular to the electronic structure or optical properties. Incorporation of Co2+ ions in the perovskite structure tunes the optical properties of the nanostructures making this perovskite a visible light active material (Eg = 1.6 eV). This modification in the optical behaviour is the result of size effect, the crystallite size of the doped nanostructures increases with cobalt doping concentration. Photolumniscance (PL) study indicated that CsPbCl3 exhibited Blue emission. Thermogravametric analysis (TGA) revealed that the nanostructures are quite stable at elavated temperatures. The electrochemical performance depicts the pseudocapacative nature of the synthesized nanostructures and can used for charge storage devices. The charge storage capability showed direct proportionality with cobalt ion concentration. And Finally the photocatalytic performance of synthesized material shows superior catalytic ability degrading 90% of methylene blue (MB) dye in 180 min under visible light conditions.
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Lai CY, Zhou L, Yuan Z, Guo J. Hydrogen-driven microbial biogas upgrading: Advances, challenges and solutions. WATER RESEARCH 2021; 197:117120. [PMID: 33862393 DOI: 10.1016/j.watres.2021.117120] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 03/12/2021] [Accepted: 04/02/2021] [Indexed: 06/12/2023]
Abstract
As a clean and renewable energy, biogas is an important alternative to fossil fuels. However, the high carbon dioxide (CO2) content in biogas limits its value as a fuel. 'Biogas upgrading' is an advanced process which removes CO2 from biogas, thereby converting biogas to biomethane, which has a higher commercial value. Microbial technologies offer a sustainable and cost-effective way to upgrade biogas, removing CO2 using hydrogen (H2) as electron donor, generated by surplus electricity from renewable wind or solar energy. Hydrogenotrophic methanogens can be applied to convert CO2 with H2 to methane (CH4), or alternatively, homoacetogens can convert both CO2 and H2 into value-added chemicals. Here, we comprehensively review the current state of biogas generation and utilization, and describe the advances in biological, H2-dependent biogas upgrading technologies, with particular attention to key challenges associated with the processes, e.g., metabolic limitations, low H2 transfer rate, and finite CO2 conversion rate. We also highlight several new strategies for overcoming technical barriers to achieve efficient CO2 conversion, including process optimization to eliminate metabolic limitation, novel reactor designs to improve H2 transfer rate and utilization efficiency, and employing advanced genetic engineering tools to generate more efficient microorganisms. The insights offered in this review will promote further exploration into microbial, H2-driven biogas upgrading, towards addressing the global energy crisis and climate change associated with use of fossil fuels.
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Affiliation(s)
- Chun-Yu Lai
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia
| | - Linjie Zhou
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia
| | - Zhiguo Yuan
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia
| | - Jianhua Guo
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia.
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Khan N, Anwer AH, Khan MD, Azam A, Ibhadon A, Khan MZ. Magnesium ferrite spinels as anode modifier for the treatment of Congo red and energy recovery in a single chambered microbial fuel cell. JOURNAL OF HAZARDOUS MATERIALS 2021; 410:124561. [PMID: 33246812 DOI: 10.1016/j.jhazmat.2020.124561] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 10/15/2020] [Accepted: 11/10/2020] [Indexed: 06/12/2023]
Abstract
Magnesium Ferrite (MgFe2O4) spinel structures prepared by a solid-state reaction was used as an anode modifier in the microbial fuel cell (MFC) treatment of Congo red dye. The performance of the reactors with unmodified stainless-steel mesh anode (CR-1) and MgFe2O4 coated stainless steel mesh anode (CR-2) were tested and compared followed by aerobic treatment. The peak power density was observed to be 295.936 (CR-1) and 430.336 mW/m2 (CR-2) revealing increased bioenergy output and better electron transfer in the reactor with the MgFe2O4 modified anode. The final decolourisation efficiencies were found to be 92.053% for CR-1 and 98.386% for CR-2. The formation of metabolites (diaminonaphthalene-1-sulfonate, 1-(biphenyl-4-yl)-2-(naphthalene-2-yl) diazene, benzidine and phthalic acid, monoethyl ether) during the anaerobic-aerobic biotreatment of azo dye was confirmed using Gas chromatography coupled Mass spectrometry system. Scanning electron microscopy confirmed a uniform coating of MgFe2O4 on the anode surface with evidence of biofilm formation in the system. Electrochemical studies confirmed the superior performance of spinel coated anode with enhanced redox activity. In addition, the charge-discharge studies confirmed the high capacitive nature of the modified electrode improving the electrodes charge holding capacity. The study suggested an effective treatment strategy for the treatment of Congo red dye.
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Affiliation(s)
- Nishat Khan
- Environmental Research Laboratory, Department of Chemistry, Aligarh Muslim University, Aligarh 202 002, UP, India
| | - Abdul Hakeem Anwer
- Industrial Chemistry Research Laboratory, Depatment of Chemistry, Aligarh Muslim University, Aligarh 202 002, UP, India
| | - Mohammad Danish Khan
- Industrial Chemistry Research Laboratory, Depatment of Chemistry, Aligarh Muslim University, Aligarh 202 002, UP, India
| | - Ameer Azam
- Department of Applied Physics, Zakir Husain College of Engineering and Technology, Aligarh Muslim University, Aligarh 202 002, UP, India
| | - Alex Ibhadon
- Department of Chemical Engineering, Faculty of Science and Engineering, University of Hull, Cottingham Road, Hull HU6 7RX, United Kingdom
| | - Mohammad Zain Khan
- Environmental Research Laboratory, Department of Chemistry, Aligarh Muslim University, Aligarh 202 002, UP, India; Industrial Chemistry Research Laboratory, Depatment of Chemistry, Aligarh Muslim University, Aligarh 202 002, UP, India.
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Electrodeposited Hybrid Biocathode-Based CO 2 Reduction via Microbial Electro-Catalysis to Biofuels. MEMBRANES 2021; 11:membranes11030223. [PMID: 33810075 PMCID: PMC8004817 DOI: 10.3390/membranes11030223] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/15/2021] [Accepted: 03/16/2021] [Indexed: 11/30/2022]
Abstract
Microbial electrosynthesis is a new approach to converting C1 carbon (CO2) to more complex carbon-based products. In the present study, CO2, a potential greenhouse gas, was used as a sole carbon source and reduced to value-added chemicals (acetate, ethanol) with the help of bioelectrochemical reduction in microbial electrosynthesis systems (MES). The performance of MES was studied with varying electrode materials (carbon felt, stainless steel, and cobalt electrodeposited carbon felt). The MES performance was assessed in terms of acetic acid and ethanol production with the help of gas chromatography (GC). The electrochemical characterization of the system was analyzed with chronoamperometry and cyclic voltammetry. The study revealed that the MES operated with hybrid cobalt electrodeposited carbon felt electrode yielded the highest acetic acid (4.4 g/L) concentration followed by carbon felt/stainless steel (3.7 g/L), plain carbon felt (2.2 g/L), and stainless steel (1.87 g/L). The alcohol concentration was also observed to be highest for the hybrid electrode (carbon felt/stainless steel/cobalt oxide is 0.352 g/L) as compared to the bare electrodes (carbon felt is 0.22 g/L) tested, which was found to be in correspondence with the pH changes in the system. Electrochemical analysis revealed improved electrotrophy in the hybrid electrode, as confirmed by the increased redox current for the hybrid electrode as compared to plain electrodes. Cyclic voltammetry analysis also confirmed the role of the biocatalyst developed on the electrode in CO2 sequestration.
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Thatikayala D, Pant D, Min B. A mesoporous silica-supported CeO2/cellulose cathode catalyst for efficient bioelectrochemical reduction of inorganic carbon to biofuels. REACT CHEM ENG 2021. [DOI: 10.1039/d1re00166c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Single chamber MES reactor – microbial reduction synthesis of CO2 to VFA.
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Affiliation(s)
- Dayakar Thatikayala
- Department of Environmental Science and Engineering, Kyung Hee University, Yongin, Republic of Korea
| | - Deepak Pant
- Separation and Conversion Technology, Flemish Institute for Technological Research (VITO), Boeretang 200, 2400 Mol, Belgium
| | - Booki Min
- Department of Environmental Science and Engineering, Kyung Hee University, Yongin, Republic of Korea
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Ganie AS, Bano S, Sultana S, Sabir S, Khan MZ. Ferrite Nanocomposite Based Electrochemical Sensor: Characterization, Voltammetric and Amperometric Studies for Electrocatalytic Detection of Formaldehyde in Aqueous Media. ELECTROANAL 2020. [DOI: 10.1002/elan.202060179] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Adil Shafi Ganie
- Environmental Research Laboratory Department of Chemistry Aligarh Muslim University Aligarh 202002 Uttar Pradesh India
| | - Sayfa Bano
- Environmental Research Laboratory Department of Chemistry Aligarh Muslim University Aligarh 202002 Uttar Pradesh India
| | - Saima Sultana
- Environmental Research Laboratory Department of Chemistry Aligarh Muslim University Aligarh 202002 Uttar Pradesh India
| | - Suhail Sabir
- Environmental Research Laboratory Department of Chemistry Aligarh Muslim University Aligarh 202002 Uttar Pradesh India
| | - Mohammad Zain Khan
- Environmental Research Laboratory Department of Chemistry Aligarh Muslim University Aligarh 202002 Uttar Pradesh India
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Khan N, Khan MD, Sabir S, Nizami AS, Anwer AH, Rehan M, ZainKhan M. Deciphering the effects of temperature on bio-methane generation through anaerobic digestion. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:29766-29777. [PMID: 31873899 DOI: 10.1007/s11356-019-07245-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 12/02/2019] [Indexed: 06/10/2023]
Abstract
Anaerobic digestion (AD) is a sustainable wastewater treatment technology which facilitates energy, nutrient, and water recovery from organic wastes. The agricultural and industrial wastes are suitable substrates for the AD, as they contain a high level of biodegradable compounds. The aim of this study was to examine the AD of three different concentrations of phenol (100, 200, and 300 mg/L) containing wastewater with and without co-substrate (acetate) at four different temperatures (25, 35, 45, and 55 °C) to produce methane (CH4)-enriched biogas. It was observed that the chemical oxygen demand (COD) and phenol removal efficiencies of up to 76% and 72%, respectively, were achieved. The CH4 generation was found higher in anaerobic batch reactors (ABRs) using acetate as co-substrate, with the highest yield of 189.1 μL CH4 from 500 μL sample injected, obtained using 200 mg/L of phenol at 35 °C. The results revealed that the performance of ABR in terms of degradation efficiency, COD removal, and biogas generation was highest at 35 °C followed by 55, 45, and 25 °C indicating 35 °C to be the optimum temperature for AD of phenolic wastewater with maximum energy recovery. Scanning electron microscopy (SEM) revealed that the morphology of the anaerobic sludge depends greatly on the temperature at which the system is maintained which in turn affects the performance and degradation of toxic contaminants like phenol. It was observed that the anaerobic sludge maintained at 35 °C showed uniform channels leading to higher permeability through enhanced mass transfer to achieve higher degradation rates. However, the denser sludge as in the case of 55 °C showed lesser permeability leading to limited transfer and thus reduced treatment. Quantitative real-time PCR (qPCR) analysis revealed a more noteworthy change in the population of the microbial communities due to temperature than the presence of phenol with the methanogens being the dominating species at 35 °C. The findings suggest that the planned operation of the ABR could be a promising choice for CH4-enriched biogas and COD removal from phenolic wastewater.
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Affiliation(s)
- Nishat Khan
- Department of Chemistry, Environmental Research Laboratory, Aligarh Muslim University, Aligarh, Uttar Pradesh, 202002, India
| | - Mohammad Danish Khan
- Department of Chemistry, Environmental Research Laboratory, Aligarh Muslim University, Aligarh, Uttar Pradesh, 202002, India
| | - Suhail Sabir
- Department of Chemistry, Environmental Research Laboratory, Aligarh Muslim University, Aligarh, Uttar Pradesh, 202002, India
| | - Abdul-Sattar Nizami
- Sustainable Development Study Centre, Government College University, Lahore, Pakistan.
| | - Abdul Hakeem Anwer
- Department of Chemistry, Environmental Research Laboratory, Aligarh Muslim University, Aligarh, Uttar Pradesh, 202002, India
| | - Mohammad Rehan
- Center of Excellence in Environmental Studies (CEES), King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mohammad ZainKhan
- Department of Chemistry, Environmental Research Laboratory, Aligarh Muslim University, Aligarh, Uttar Pradesh, 202002, India.
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Investigating microbial fuel cell aided bio-remediation of mixed phenolic contaminants under oxic and anoxic environments. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2019.107485] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Flexer V, Jourdin L. Purposely Designed Hierarchical Porous Electrodes for High Rate Microbial Electrosynthesis of Acetate from Carbon Dioxide. Acc Chem Res 2020; 53:311-321. [PMID: 31990521 DOI: 10.1021/acs.accounts.9b00523] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Carbon-based products are crucial to our society, but their production from fossil-based carbon is unsustainable. Production pathways based on the reuse of CO2 will achieve ultimate sustainability. Furthermore, the costs of renewable electricity production are decreasing at such a high rate, that electricity is expected to be the main energy carrier from 2040 onward. Electricity-driven novel processes that convert CO2 into chemicals need to be further developed. Microbial electrosynthesis is a biocathode-driven process in which electroactive microorganisms derive electrons from solid-state electrodes to catalyze the reduction of CO2 or organics and generate valuable extracellular multicarbon reduced products. Microorganisms can be tuned to high-rate and selective product formation. Optimization and upscaling of microbial electrosynthesis to practical, real life applications is dependent upon performance improvement while maintaining low cost. Extensive biofilm development, enhanced electron transfer rate from solid-state electrodes to microorganisms and increased chemical production rate require optimized microbial consortia, efficient reactor designs, and improved cathode materials. This Account is about the development of different electrode materials purposely designed for improved microbial electrosynthesis: NanoWeb-RVC and EPD-3D. Both types of electrodes are biocompatible, highly conductive three-dimensional hierarchical porous structures. Both chemical vapor deposition (CVD) and electrophoretic deposition were used to grow homogeneous and uniform carbon nanotube layers on the honeycomb structure of reticulated vitreous carbon. The high surface area to volume ratio of these electrodes maximizes the available surface area for biofilm development, i.e., enabling an increased catalyst loading. Simultaneously, the nanostructure makes it possible for a continuous electroactive biofilm to be formed, with increased electron transfer rate and high Coulombic efficiencies. Fully autotrophic biofilms from mixed cultures developed on both types of electrodes rely on CO2 as the sole carbon source and the solid-state electrode as the unique energy supply. We present first the synthesis and characteristics of the bare electrodes. We then report the outstanding performance indicators of these novel biocathodes: current densities up to -200 A m-2 and acetate production rates up to 1330 g m-2 day-1, with electron and CO2 recoveries into acetate being very close to 100% for mature biofilms. The performance indicators are still among the highest reported by either purposely designed or commercially available biocathodes. Finally, we made use of the titration and off-gas analysis sensor (TOGA) to elucidate the electron transfer mechanism in these efficient biocathodes. Planktonic cells in the catholyte were found irrelevant for acetate production. We identified the electron transfer to be mediated by biologically induced H2. H2 is not detected in the headspace of the reactors, unless CO2 feeding is interrupted or the cathodes sterilized. Thus, the biofilm is extremely efficient in consuming the generated H2. Finally, we successfully demonstrated the use of a synthetic biogas mixture as a CO2 source. We thus proved the potential of microbial electrosynthesis for the simultaneous upgrading of biogas, while fixating CO2 via the production of acetate.
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Affiliation(s)
- Victoria Flexer
- Centro de Investigación y Desarrollo en Materiales Avanzados y Almacenamiento de Energía de Jujuy-CIDMEJu (CONICET-Universidad Nacional de Jujuy), Av. Martijena S/N, Palpalá 4612, Argentina
| | - Ludovic Jourdin
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
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