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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

Fates of Pyruvate

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

Production of Alcohol

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...

Bioplastics

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...

Upstream Processing

Upstream Processing

Upstream processing represents a critical phase in biomanufacturing, wherein biological systems such as microorganisms, mammalian cells, or insect cells are cultivated to produce therapeutic proteins, vaccines, enzymes, or other biologically derived products. This phase encompasses all steps from the selection and genetic manipulation of the production organism to the cultivation of cells in bioreactors under tightly controlled environmental conditions.Host Selection and Genetic OptimizationThe...

Bioreactor Controls-III

Bioreactor Controls-III

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...

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Related Experiment Video

Updated: May 28, 2026

Biomass Conversion to Produce Hydrocarbon Liquid Fuel Via Hot-vapor Filtered Fast Pyrolysis and Catalytic Hydrotreating

Biomass Conversion to Produce Hydrocarbon Liquid Fuel Via Hot-vapor Filtered Fast Pyrolysis and Catalytic Hydrotreating

Published on: December 25, 2016

Bioprocessing for biofuels.

Harvey W Blanch¹

¹Department of Chemical and Biomolecular Engineering, Joint BioEnergy Institute, University of California Berkeley, Berkeley, CA 94720, United States. blanch@berkeley.edu

Current Opinion in Biotechnology

|October 29, 2011

Summary

Innovations in bioprocessing are crucial for commercializing biofuels. Key challenges include reducing energy costs for product recovery and improving biomass pretreatment and microalgae lipid extraction for sustainable fuel production.

Area of Science:

Biotechnology
Chemical Engineering
Sustainable Energy

Background:

Engineering microbial hosts for biofuels is advancing.
Bioprocessing innovations are essential for commercializing biofuels, including conventional and next-generation fuels.
Current bioprocessing methods face significant challenges in energy efficiency and cost-effectiveness.

Purpose of the Study:

To highlight the critical need for bioprocessing innovations in biofuel commercialization.
To identify key bottlenecks in the production of various biofuels, including ethanol, butanol, and algal biodiesel.
To emphasize the importance of addressing challenges in product recovery, aerobic pathway control, biomass pretreatment, and lipid extraction.

Main Methods:

Review of existing bioprocessing techniques for biofuels.

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

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Last Updated: May 28, 2026

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Published on: December 25, 2016

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Published on: August 10, 2016

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Published on: September 2, 2016

Analysis of energy costs associated with product recovery for ethanol and butanol.

Examination of challenges in large-scale aerobic cultivation and biomass conversion.

Assessment of methods for microalgae harvesting and lipid extraction.

Main Results:

Reducing energy costs for ethanol and butanol recovery is a major challenge.
Large-scale production of fuels from heterologous aerobic pathways requires precise control of aeration and cooling.
Effective pretreatment of lignocellulosic biomass is necessary to enhance enzymatic hydrolysis.
Efficient recovery and lipid extraction from microalgae remain economic and practical hurdles for algal biodiesel.

Conclusions:

Significant advancements in bioprocessing are required to overcome current limitations in biofuel production.
Addressing energy efficiency, scalability, and feedstock conversion are critical for the commercial viability of biofuels.
Further research and development in bioprocessing technologies will accelerate the adoption of sustainable fuel alternatives.