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image of A Review on the Production of Cost-Effective Biodiesel from Animal Fat Wastes

Abstract

Introduction

Biodiesel from animal waste provides an alternative source of fuel. It is eco-friendly and cheaper than conventional fuel obtained through the distillation of crude oil. Biodiesel is similar to petroleum diesel and can be used alone or blended with fossil diesel as an energy source. This study provides insight into the use of waste animal fats for biodiesel production.

Methods

The data were retrieved from different sources, including PubMed, Google Scholar, and other scientific websites. Scope of the study can be clearly understood from the facts revealed from patent work.

Results

The use of waste animal fats provides a renewable and eco-friendly alternative to petroleum diesel. Both homogeneous and heterogeneous catalysis methods have proven effective for processing WAFs, with KOH and NaOH commonly used in concentrations ranging from 1% to 2%. Increasing the catalyst concentration within a certain range can enhance biodiesel yield. However, the use of acid catalysts for transesterification of WAFs is time-intensive and requires a high alcohol-to-fat ratio. Despite these advantages, challenges remain in catalyst reuse for certain reactions and in managing complex selectivity combinations. Lipases in water-poor environments are also employed for transesterification.

Discussion

The fatty acid profiles of both animal and vegetable sources have been found suitable for biodiesel production. Although it is a cheap source for generating fuel, using specific reaction media such as acyl acceptors and employing a combination of two enzymes on a specialized support can help further reduce costs.

Conclusion

Currently, biodiesel is widely used in developed countries such as the US and Germany, but its adoption remains limited in developing nations. Optimizing transesterification methods—including the use of heterogeneous or homogeneous catalysis—and incorporating innovative technologies such as microwave-assisted enzymes can further enhance biodiesel yield and efficiency.

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2026-01-20
2026-02-23

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/content/journals/biot/10.2174/0118722083378315251128054701
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A Review on the Production of Cost-Effective Biodiesel from Animal Fat Wastes
Bentham Science Publishers ; https://doi.org/10.2174/0118722083378315251128054701
/content/journals/biot/10.2174/0118722083378315251128054701
/content/journals/biot/10.2174/0118722083378315251128054701
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  • Article Type:     Review Article
Keywords: crude oil ; renewable energy ; Biodiesel ; enzymatic catalysis ; animal waste ; chemical analysis

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