Cellulosic Biomass
Cellulosic Biomass - Related Videos
07:34
Biofuels: Producing Ethanol from Cellulosic Material
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2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University In this experiment, cellulosic material (such as corn stalks, leaves, grasses, etc.) will be used as a feedstock for the production of ethanol. The cellulosic material is first pretreated (ground and heated), digested with enzymes, and then fermented with yeast. Ethanol production is monitored using an ethanol probe. The experiment can be extended to optimize ethanol production by varying the feedstock used,...
12:34
Estimation of Crystalline Cellulose Content of Plant Biomass using the Updegraff Method
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Cited by 24 •
2021
The Updegraff method is the most widely used method for the cellulose estimation. The main purpose of this demonstration is to provide a detailed Updegraff protocol for estimation of cellulose content in plant biomass samples.
10:42
Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
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Cited by 65 •
2016
The pretreatment of lignocellulosic biomass with protic low-cost ionic liquids is shown, resulting in a delignified cellulose-rich pulp and a purified lignin. The pulp gives rise to high glucose yields after enzymatic saccharification.
10:46
Comprehensive Compositional Analysis of Plant Cell Walls (Lignocellulosic biomass) Part II: Carbohydrates
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Cited by 300 •
2010
Plant biomass is a major carbon-neutral renewable resource that could be used for the production of biofuels. Plant biomass consists mainly of cell walls, a structurally complex composite material termed lignocellulosics. Here we describe a protocol for a comprehensive analysis of the content and composition of wall derived carbohydrates.
02:01
Preparation of Cyanobacterial Culture for Biomass Production
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2025
Source: Jiang, H., Ho, M. Isolation and Characterization of Intact Phycobilisome in Cyanobacteria. J. Vis. Exp.(2021).This video demonstrates the procedure for culturing cyanobacteria to obtain biomass by growing cells under continuous illumination with carbon dioxide supply and nutrient-rich conditions, followed by harvesting via centrifugation.
FAQs
Pretreatment is needed because lignin physically shields the carbohydrate polymers in plant material from enzymatic attack. By disrupting that structure, the process makes cellulose and hemicellulose more accessible for subsequent hydrolysis. This step therefore influences whether the biomass can be efficiently converted into fermentable sugars, linking the material’s structural resistance to the performance of later biological processing.
Enzymatic hydrolysis follows structural disruption rather than replacing it. Enzymes act on the now-accessible cellulose and hemicellulose, releasing sugars that microorganisms can convert into biofuels and bioproducts. The sequence matters because carbohydrate breakdown supplies the material for biological conversion, while limited access to the polymers can reduce the amount of fermentable sugar available.
Residual lignin need not be treated only as a waste stream. After carbohydrate conversion, it can provide energy for the process or serve as a source of chemicals. This creates a second value pathway within the biomass system, allowing the non-carbohydrate fraction to support operations or contribute to material production rather than being left unused.
Microorganisms use the fermentable sugars released from cellulose and hemicellulose as starting material for biofuels and other bioproducts. This biological stage broadens the purpose of processing beyond sugar recovery: the same plant-derived resource can support renewable energy production and the manufacture of useful materials. The conversion therefore links enzymatic breakdown with biological product formation.
Processing follows a linked sequence: select plant-derived feedstocks, pretreat them to disrupt the lignin-associated structure, hydrolyze the accessible cellulose and hemicellulose into fermentable sugars, and expose those sugars to microorganisms for conversion. Residual lignin can then support process energy or chemical production. This workflow connects structural preparation, sugar release, and product formation.
These sources represent different ways to supply plant material without relying on a single resource category. Agricultural residues and forestry waste connect biomass processing with waste management, while dedicated energy crops provide purpose-grown material. Considering all three broadens sourcing options and can support renewable energy and materials production while reducing reliance on fossil resources.
Using cellulosic feedstocks can address two environmental goals at once: it can reduce reliance on fossil resources and improve the management of agricultural or forestry waste. When the resulting sugars are converted into biofuels and bioproducts, the approach also supports more sustainable energy and materials production. These benefits explain its relevance within environmental sciences.