Biohydrogen production from wastewater and organic solid wastes

Mogili, Nitish Venkateswarlu; Murugesan, Nithya; Ayothiraman, Seenivasan; Gautam, Rahul; Deshavath, Narendra Naik; Erva, Rajeswara Reddy

doi:10.1016/b978-0-323-85387-3.00009-4

Cited by 12 publications

(3 citation statements)

References 91 publications

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“…Acid and alkali pretreatment improves surface topography, solubility properties, and reactivity of KF by degrading cellulose, pectin, natural oils, and lignin in fibers [ 69 , 84 , 85 ]. Sulfuric, hydrochloric, nitric, acetic, or maleic acid can be used to pre-treat fibers in diluted or concentrated forms [ 86 ]. Alkaline pre-treatment on fibers, on the other hand, involves a concentrated aqueous solution with a strong base [ 87 ] such as sodium hydroxide, potassium hydroxide, or calcium oxide.…”

Section: Pre-treatments and Surface Modification Of Kapok Fibersmentioning

confidence: 99%

Modification Strategies of Kapok Fiber Composites and Its Application in the Adsorption of Heavy Metal Ions and Dyes from Aqueous Solutions: A Systematic Review

Futalan

Choi

Soriano

et al. 2022

IJERPH

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Kapok fiber (Ceiba pentandra) belongs to a group of natural fibers that are mainly composed of cellulose, lignin, pectin, and small traces of inorganic compounds. These fibers are lightweight with hollow tubular structure that is easy to process and abundant in nature. Currently, kapok fibers are used in industry as filling material for beddings, upholstery, soft toys, and nonwoven materials. However, kapok fiber has also a potential application in the adsorptive removal of heavy metal ions and dyes from aqueous systems. This study aims to provide a comprehensive review about the recent developments on kapok fiber composites including its chemical properties, wettability, and surface morphology. Effective and innovative kapok fiber composites are analyzed with the help of characterization tools such as scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, thermogravimetric analysis, Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, and Brunauer-Emmett-Teller analysis. Different pre-treatment methods such as alkali and acid pre-treatment, oxidation pre-treatment, and Fenton reaction are discussed. These techniques are applied to enhance the hydrophilicity and to generate rougher fiber surfaces. Moreover, surface modification and synthesis of kapok fiber-based composites and its environmental applications are examined. There are various methods in the fabrication of kapok fiber composites that include chemical modification and polymerization. These procedures allow the kapok fiber composites to have higher adsorption capacities for selective heavy metal and dye removal.

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Section: Pre-treatments and Surface Modification Of Kapok Fibersmentioning

confidence: 99%

Modification Strategies of Kapok Fiber Composites and Its Application in the Adsorption of Heavy Metal Ions and Dyes from Aqueous Solutions: A Systematic Review

Futalan

Choi

Soriano

et al. 2022

IJERPH

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“…The waste-to-energy route not only addresses the dwindling conventional fossil fuel reserves, but also plays a crucial role in combating global warming and other associated environmental issues. 1,3,4 In this pursuit, carbon-neutral fuels such as hydrogen could be the answer to the scientific community. Hydrogen is an exceptional fuel, as its combustion does not emit any greenhouse gases and also has a high energy content of 119.9 kJ/mol.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Production in Microbial Electrolysis Cell and Valorization of Reactor Effluent for Algal Biomass

Gautam,

Steinberger Wilckens,

Ghosh

2024

ACS Sustainable Resour. Manage.

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To counter energy scarcity and geopolitical tensions, sustainable fuels are the need of the hour. The current study has explored a noble combination of hydrogen production in a single-chambered microbial electrolysis cell and then its reactor effluent was used for algal biomass production to promote maximum resource recovery. A heat-pretreated sugarcane bagasse fed MEC resulted in 2.1 ± 0.02 m3 of hydrogen/m3/day at an applied voltage of 0.8 V, with a coulombic efficiency of 57.6 ± 0.5 % and an electrical energy efficiency of 70.16 ± 2%. A high current density of 48 A/m2 due to effective biofilm and a corresponding COD removal efficiency of 69.1 ± 2% were reported, and hydrogen production rates (HPR) for the MEC were reported as 1.85 ± 0.02 m3/m2/d on the basis of cathode surface area. Further, the MEC reactor digestate was separated in solid and liquid digestate fractions, supplied to the algal growth batch reactor, and resulted in significant biomass growth. The solid feed digestate residue produced a biomass productivity of 0.95 g/L, and liquid feed digestate filtrate produced a biomass productivity of 0.65 g/L of dry algal biomass. The study proposes maximum energy extraction and reactor digestate valorization for a circular economy and a sustainable environment.

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“…This has led to an integration of solid waste management and biofuel production. Among the potential biofuels studied, Bio-hydrogen is considered as one of the most attractive alternatives owing to the properties of the hydrogen as fuel [10][11][12][13][14]. The combustion of hydrogen produces only heat and water without any greenhouse emissions which makes it a potential fuel.…”

Section: Introductionmentioning

confidence: 99%

Agro-Industry Waste Fed Microbial Electrolysis Cell for Biohydrogen Production

Ghosh,

Gautam

Global NEST International Conference on Environmental Science &Amp; Technology

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The microbial electrolysis cell is gaining advantage over the other biological hydrogen production techniques as it requires less energy for hydrogen generation as compared to the water electrolysis process. The present study aims to assess the aptness of Agro-Industry Waste (AIW) fed membrane-less single chambered Microbial Electrolysis Cell (SC-MEC) for the biohydrogen production in batch mode under applied voltage of 1 V at 30 ± 2 °C (Fig.1). The performance of the reactor was assessed through volume of hydrogen per gram of COD removed, columbic efficiency, cathodic hydrogen recovery and COD removal efficiency. The highest COD removal of 71% was reported with columbic efficiency of around 45%. These results demonstrated an energy-efficient approach for biohydrogen production from AIW coupled with waste mitigation.

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Biohydrogen production from wastewater and organic solid wastes

Cited by 12 publications

References 91 publications

Modification Strategies of Kapok Fiber Composites and Its Application in the Adsorption of Heavy Metal Ions and Dyes from Aqueous Solutions: A Systematic Review

Modification Strategies of Kapok Fiber Composites and Its Application in the Adsorption of Heavy Metal Ions and Dyes from Aqueous Solutions: A Systematic Review

Hydrogen Production in Microbial Electrolysis Cell and Valorization of Reactor Effluent for Algal Biomass

Agro-Industry Waste Fed Microbial Electrolysis Cell for Biohydrogen Production

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