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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...

Green Algae

Green Algae

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...

Microbial Bioremediation of Hydrocarbons

Microbial Bioremediation of Hydrocarbons

Bioremediation is an environmentally sustainable process that employs living organisms—primarily microorganisms—to degrade or neutralize pollutants from contaminated environments. In oil spills and hydrocarbon pollution, bioremediation involves the use of hydrocarbon-degrading bacteria to transform toxic compounds into less harmful substances. This approach leverages natural microbial metabolic processes and is considered both cost-effective and ecologically favorable compared to physical or...

Microbial Fuel Cells

Microbial Fuel Cells

Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...

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...

Overview of Algae

Overview of Algae

The kingdom Archaeplastida encompasses red and green algae, along with land plants. Unlike other protists with chloroplasts that arose through secondary endosymbiosis, only red and green algae originated from primary endosymbiotic events. This diverse group of eukaryotic organisms contains chlorophyll and performs oxygenic photosynthesis.Algae exist in various forms, from large brown kelp in coastal waters to green scum in puddles and stains on rocks or soil. Some species are responsible for...

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Related Experiment Video

Updated: Jul 7, 2026

Experimental Protocol for Biodiesel Production with Isolation of Alkenones as Coproducts from Commercial Isochrysis Algal Biomass

Experimental Protocol for Biodiesel Production with Isolation of Alkenones as Coproducts from Commercial Isochrysis Algal Biomass

Published on: June 24, 2016

Biodiesel from microalgae beats bioethanol.

¹School of Engineering, Massey University, Private Bag 11 222, Palmerston North, New Zealand. Y.Chisti@massey.ac.nz

Trends in Biotechnology

|January 29, 2008

Summary

This summary is machine-generated.

Microalgae-derived biodiesel offers a sustainable alternative to petroleum fuels, unlike crop-based biofuels. This renewable fuel can potentially replace fossil fuels without impacting food production or other agricultural needs.

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Related Experiment Videos

Last Updated: Jul 7, 2026

Experimental Protocol for Biodiesel Production with Isolation of Alkenones as Coproducts from Commercial Isochrysis Algal Biomass

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Published on: June 24, 2016

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Quantification of Heavy Metals and Other Inorganic Contaminants on the Productivity of Microalgae

Quantification of Heavy Metals and Other Inorganic Contaminants on the Productivity of Microalgae

Published on: July 10, 2015

Area of Science:

Biotechnology
Sustainable Energy
Environmental Science

Background:

Petroleum-derived transport fuels contribute to global warming and have limited availability.
Renewable biofuels are essential to replace fossil fuels.
Biodiesel and bioethanol are the primary renewable fuels currently considered.

Purpose of the Study:

To evaluate the sustainability of current biodiesel and bioethanol production methods.
To identify a viable renewable biofuel capable of displacing petroleum-based transport fuels.
To assess the potential of microalgae as a source for sustainable biofuel production.

Main Methods:

Comparative analysis of biofuel production from agricultural crops versus microalgae.
Assessment of land and resource requirements for large-scale biofuel production.
Evaluation of the impact on food supply and other crop products.

Main Results:

Biodiesel and bioethanol from agricultural crops are not sustainable replacements for fossil fuels.
Microalgae demonstrate significantly higher productivity for biodiesel production compared to oil crops like oil palm.
Microalgal biodiesel production is superior to sugarcane-based bioethanol in terms of potential volume and sustainability.

Conclusions:

Current agricultural crop-based biofuels are unsustainable.
Biodiesel derived from microalgae is the only identified renewable biofuel with the potential to fully replace petroleum transport fuels.
Microalgal biodiesel offers a sustainable solution without compromising food security or agricultural resources.