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Biofuels

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...

Fates of Pyruvate

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Pyruvate is the end product of glycolysis, where glucose is oxidized to pyruvate, simultaneously reducing NAD+ to NADH. Two molecules of ATP are also produced by substrate-level phosphorylation.
In aerobic organisms, pyruvate is metabolized via the citric acid cycle to produce reduced coenzymes NADH and FADH2. These coenzymes are then oxidized in the electron transport chain to produce ATP and, in the process, regenerate the NAD+ and FAD. As seen in some cell types and organisms, fermentation...

Production of Alcohol

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Continuous fermentation is a key strategy in industrial ethanol production, particularly when efficiency, scalability, and high yields are essential. This approach allows for uninterrupted operation and optimized resource utilization. The primary feedstock, corn starch, undergoes enzymatic hydrolysis facilitated by α-amylase and glucoamylase. These enzymes break down the starch into fermentable sugars such as glucose, which are readily assimilated by fermentative microorganisms.Fermentation...

Bioreactor Controls-III

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Strain improvement is a foundational strategy in industrial microbiology aimed at maximizing microbial productivity, particularly because natural isolates typically yield commercially valuable products in very low concentrations. Although optimizing the culture medium and environmental conditions can improve yields, these adjustments are inherently limited by the organism’s genetic potential. As a result, the focus shifts toward genetic modifications to enhance biosynthetic capacity. The...

Green Algae

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Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...

Environmental Applications of Microorganisms

Environmental Applications of Microorganisms

Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...

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Laboratory Production of Biofuels and Biochemicals from a Rapeseed Oil through Catalytic Cracking Conversion

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Published on: September 2, 2016

Land availability for biofuel production.

Ximing Cai¹, Xiao Zhang, Dingbao Wang

¹Ven Te Chow Hydrosystems Laboratory, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA. xmcai@illinois.edu

Environmental Science & Technology

|December 15, 2010

Summary

This summary is machine-generated.

Marginal lands in major agricultural regions offer vast potential for biofuel production. Utilizing these lands for energy crops could meet a significant portion of global liquid fuel needs without impacting food production.

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Area of Science:

Agricultural Science
Energy Science
Environmental Science

Background:

Global demand for liquid fuels necessitates sustainable alternatives.
Marginal agricultural lands are often underutilized and suitable for energy crop cultivation.
Biofuel production can be optimized by considering land quality and type.

Purpose of the Study:

To estimate the available land for biofuel production in key agricultural regions worldwide.
To assess the potential of marginal lands for second-generation biofuel feedstocks and low-input high-diversity (LIHD) perennials.
To determine the contribution of these lands to global liquid fuel consumption.

Main Methods:

Land availability assessment based on soil productivity, land slope, and climate.
Inclusion of abandoned/degraded cropland, grasslands, savannas, and shrublands.
Scenario analysis considering different land use options and pasture land.

Main Results:

320-702 million hectares available from degraded croplands alone.
Up to 1107-1411 million hectares potentially available including marginal grasslands, savannas, and shrublands.
Biofuel production could meet 26-55% of current world liquid fuel consumption.
Africa and Brazil hold significant biofuel production potential.

Conclusions:

Marginal lands represent a substantial resource for sustainable biofuel production.
Utilizing these lands can significantly reduce reliance on fossil fuels without compromising food security or pasture land.
Strategic land use planning is crucial for maximizing biofuel potential, with Africa and Brazil as key regions.