Bacterial fermentation of cellulose: Effect of physical and chemical parameters

Armstrong, David W.; Martin, S. M.

doi:10.1002/bit.260251107

Cited by 9 publications

(3 citation statements)

References 10 publications

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“…It is well known that cellulose undergoes enzymatic degradation by specific enzymes, like cellulase and β-glucosidase. Direct physical contact between the enzyme and the surface of the cellulose molecules is a preliminary requirement to enzymatic hydrolysis [37][38][39][40]. Since cellulose is an insoluble and structurally complex substrate, this contact can be achieved only by diffusion of the enzymes into the cellulose structure [41].…”

Section: Effect Of Enzymesmentioning

confidence: 99%

Investigating the Structure-Related Properties of Cellulose-Based Superabsorbent Hydrogels

Demitri¹,

Madaghiele²,

Raucci³

et al. 2019

Hydrogels - Smart Materials for Biomedical Applications

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Superabsorbent hydrogels are macromolecular networks able to absorb and retain large amounts of water solutions within their fine mesh-like structure. More importantly, they are capable of multiple swelling/shrinking transitions in response to specific environmental cues (e.g., pH, ionic strength, temperature, presence of given electrolytes), thus exhibiting a stimuli-sensitive behavior, which makes them appealing for the design of smart devices in a number of technological fields. In particular, in the last two decades, cellulose-based superabsorbent hydrogels have proven to be an environmentally friendly and cost-effective alternative to acrylamide-based products. This chapter reviews the relationship between the molecular structure of cellulose-based hydrogels and their physicochemical properties. First, the network formation through the use of different cellulose derivatives and chemical or physical crosslinking agents is presented. Successively, the smart swelling capability of the hydrogels as a function of composition and structure is thoroughly discussed. Finally, several approaches to the hydrogel characterization are reviewed, with focus on the assessment of key mechanical, thermal and morphological properties.

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Section: Effect Of Enzymesmentioning

confidence: 99%

Investigating the Structure-Related Properties of Cellulose-Based Superabsorbent Hydrogels

Demitri¹,

Madaghiele²,

Raucci³

et al. 2019

Hydrogels - Smart Materials for Biomedical Applications

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show abstract

“…The physical and chemical parameters affecting fermentation of cellulose has been studied by various groups (Armstrong & Martin, 1983;Senthilkumar & Gunasekaran, 2005). Another bacteria acetivibro celluloyticus produces acetate, ethanol, water and carbon dioxide.…”

Section: Future Studies and Avenues Of Researchmentioning

confidence: 99%

Evaluation of some renewable energy technologies

Basu¹

2017

Min. miner. depos,

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Purpose. The study aims to outline and compare various renewable energy alternatives in view of the global warming crisis and depletion of fossil fuels which cause emissions of carbon dioxide. Carbon dioxide is a major source of pollution and is an absorbent for radiation. Methods.Literature surveys and analysis of benefits and drawbacks of the competing technologies should include the capital costs, running costs and carbon footprint. Liquid fuels have high energy to weight ratio compare to say solar panels or thermal absorbers, but what is neglected is the large refinery and other processing machinery behind the liquid fuel which is adding to the carbon footprint.Findings. Producer gas and bacterial engines are suggested as possible pollution reducing and cost effective methods for power generation. Coal, biomass, geothermal and hydroelectric have the lowest running cost, but carbon footprint cost is neglected. Solar chimneys, with low mechanical efficiency have low running costs, and no pollution. Modification of internal combustion engines to use producer gas and alcohol may reduce overall carbon footprint.Originality. Many researches focus on energy and mechanical efficiency. Bacterial engines have yet to be fully developed, and these are wonderful chemical factories but not understood in terms of classical thermodynamics. For all technologies, return on investment is more appropriate since capital costs are also included, which are neglected in mechanical efficiency calculations.Practical implications. Depletion of forest cover which acts as a greenhouse gas sink contributes to global warming. Worldwide, million of cars with internal combustion engines consuming petroleum, if converted to alternative fuels, can help in reducing the carbon gas emissions and ultimately to a slowdown in the global warming rate.

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“…The physical and chemical parameters affecting fermentation of cellulose has been studied by various groups (14,15). Another bacteria acetivibro celluloyticus produces acetate, ethanol, water and carbon dioxide.…”

Section: Future Studies and Avenues Of Researchmentioning

confidence: 99%

Sustainable Energy: Producer Gas as an Energy Resource

Basu¹

2015

IJRET

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Global warming and pollution due to Carbon emissions is an immediate worldwide concern. Fossil fuels continue to be a prime source for third world countries. Large Industrialised nations continue to pour pollution into the environment with impunity, expecting CO2 absorption by the forested underdeveloped nations. Replacement of fossil fuels by other carbon neutral and carbon negative technologies is now imperative at a global level. In this regard, Producer gas is proposed as an alternative energy cource. Biogas obtained by bacterial action on waster matter, results in high N and C sludge content after methane production. This sludge can be processed to give Producer Gas. Other crop waste like coconut husk, agricultural wastes and cellulosic wastes could be used directly. The slow reaction times of biogas (methane) production by bacterial action is avoided. The Producer gas can be stored or used directly as a substitute for methane which has hazardous qualities. In the earlyhalf of the 20th century it was piped directly to homes for cooking. Producer or Water gas was a petrol substitute in times of scarcity.

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Bacterial fermentation of cellulose: Effect of physical and chemical parameters

Cited by 9 publications

References 10 publications

Investigating the Structure-Related Properties of Cellulose-Based Superabsorbent Hydrogels

Investigating the Structure-Related Properties of Cellulose-Based Superabsorbent Hydrogels

Evaluation of some renewable energy technologies

Sustainable Energy: Producer Gas as an Energy Resource

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