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Related Concept Videos

Biofuels01:25

Biofuels

The microbial conversion of organic matter into biofuels holds potential as a renewable energy source. Among biofuel sources, microalgae are recognized as a highly efficient and adaptable feedstock for biodiesel production, owing to their rapid biomass accumulation, elevated lipid productivity, and capacity to proliferate in diverse aquatic systems, including freshwater, marine, and wastewater habitats. Unlike terrestrial crops, microalgae do not compete for land and can achieve significantly...
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Bioplastics

Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
Sugars as Energy Storage Molecules01:10

Sugars as Energy Storage Molecules

Sugar (a simple carbohydrate) metabolism (chemical reactions) is a classic example of the many cellular processes that use and produce energy. Living things consume sugar as a major energy source because sugar molecules have considerable energy stored within their bonds. Consumed carbohydrates have their origins in photosynthesizing organisms like plants. During photosynthesis, plants use the energy of sunlight to convert carbon dioxide gas into sugar molecules, like glucose. Because this...
Production of Organic Acids01:25

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Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...
Dietary Connections01:23

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In biological systems, most metabolic pathways are interconnected. The cellular respiration processes that convert glucose to ATP—such as glycolysis, pyruvate oxidation, and the citric acid cycle—tie into those that break down other organic compounds. As a result, various foods—from apples to cheese to guacamole—end up as ATP. In addition to carbohydrates, food also contains proteins and lipids—such as cholesterol and fats. All of these organic compounds are used as energy sources to produce...
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Polysaccharides such as glycogen and starch are synthesized from nucleoside diphosphate sugars, primarily uridine diphosphate glucose (UDPG) and adenosine diphosphate glucose (ADPG). These activated glucose donors act as key intermediates in carbohydrate metabolism and biosynthesis. UDPG primarily involves glycogen synthesis in animals and many bacteria, while ADPG plays a fundamental role in starch synthesis in plants and certain bacteria.UDPG is formed when glucose-1-phosphate reacts with...

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Evaluation of Integrated Anaerobic Digestion and Hydrothermal Carbonization for Bioenergy Production
07:34

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Published on: June 15, 2014

Biomass deconstruction to sugars.

Harvey W Blanch1, Blake A Simmons, Daniel Klein-Marcuschamer

  • 1Joint BioEnergy Institute, Emeryville, CA 94608, USA. blanch@berkeley.edu

Biotechnology Journal
|August 12, 2011
PubMed
Summary

Biofuel production requires breaking down lignocellulosic biomass using pretreatment methods. This review covers chemical and physical changes in biomass pretreatment, focusing on cost impacts for efficient biofuel conversion.

Area of Science:

  • Biomass Conversion and Biofuel Production
  • Chemical and Physical Pretreatment Technologies

Background:

  • Lignocellulosic biomass requires depolymerization into fermentable sugars for biofuel production.
  • Effective pretreatment is crucial to enhance the susceptibility of biomass polymers to cleavage.
  • Pretreatment significantly impacts the overall cost and economics of biomass-to-fuel conversion.

Purpose of the Study:

  • To review chemical and physical changes in various biomass pretreatment approaches.
  • To analyze the cost factors associated with different pretreatment methods.
  • To assess the economic impact of pretreatment on biofuel production.

Main Methods:

  • Review of established methods: dilute/concentrated acid pretreatment and organic solvent dissolution.
  • Inclusion of emerging techniques: ionic liquid solubilization.

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  • Analysis of chemical and physical alterations during pretreatment.

    • Main Results:

    • Detailed examination of chemical and physical transformations in biomass during pretreatment.
    • Identification of key cost drivers in biomass pretreatment processes.
    • Evaluation of how pretreatment costs affect overall biofuel production economics.

    Conclusions:

    • Pretreatment is a critical, cost-intensive step in lignocellulosic biofuel production.
    • Understanding the changes in biomass and associated costs is vital for process optimization.
    • This review provides insights into optimizing pretreatment for economic viability.