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Biofuel without secrets – learn about the generations and advantages of organic fuels

Biofuel, as an alternative to traditional energy sources, is becoming increasingly important on the automotive market. We are living in an era of electric cars and the development of alternative drive sources. The work is not only limited to drive units. In this article, we will focus on the energy transformation that is happening before our eyes.

What is biofuel?

Biofuel is a broad category of fuels that are produced from biomass – organic material of plant or animal origin. This process turns raw materials such as oil plants, cereals and agricultural waste into energy. Biofuels include biodiesel, ethanol, biogas, and many other forms that can be used as types of automotive fuels. They are seen as a step towards sustainable mobility and reducing greenhouse gas emissions.

Generations of organic fuels

There are several generations of biofuels, each representing technological progress and the use of various biomass sources.

  • 1st generation biofuels use raw materials that are also food sources, such as corn or rapeseed
  • 2nd generation biofuels are produced from lignocellulosic material such as agricultural waste
  • 3rd generation biofuels use algae
  • 4th generation biofuels include innovative methods such as genetic engineering and nanotechnology to improve efficiency and reduce production costs

1. Generation

1st generation biofuels are those produced from agricultural crops that can also be used as food. Examples include ethanol produced from corn or sugar and biodiesel obtained from rapeseed, soybean or palm oil. Despite their ecological advantages, their production is often criticized for competing with food crops, the potential impact on food prices and the use of significant amounts of arable land.

2. Generation

The second generation of biofuels come from processing raw materials that do not compete with food, such as agricultural waste, wood residues or grass. For example, cellulose contained in plant waste can be converted into ethanol using a fermentation process. These biofuels are considered more sustainable because they do not directly impact the food sector and often use waste, which further helps to reduce the amount of waste generated.

3. Generation

3rd generation biofuels are those that use advanced technologies to convert algae or other microorganisms into fuel. Algae are plants that have a very fast growth rate and a high oil content. Their high efficiency and the ability to grow in various environmental conditions make them a very promising raw material.

4. Generation

At the moment, the most advanced category, including fuels produced using genetic engineering and various biotechnological methods to increase production efficiency. Examples may include biofuels derived from genetically modified plants or algae that are designed to more efficiently produce oils or other substances that can then be converted into fuels. These methods are aimed not only at increasing production efficiency, but also at reducing the negative impact of the energy industry on the natural environment.

Biofuel production

The production of biofuels is a complex process that begins with obtaining a biomass – an organic raw material that can be processed into fuel. The first stage of production involves preparing the biomass, which may include its collection, drying and preliminary processing, such as grinding or separating specific fractions of the raw material. 

Depending on the type of biofuel, the production process will vary. Liquid biofuels, such as ethanol, are typically produced by fermentation, where microorganisms convert sugars in plants into alcohol. After fermentation, the alcohol is distilled and purified to obtain a high concentration of ethanol, which can then be added to gasoline or used on its own as fuel.


Biodiesel is produced through a process called transesterification, where plant or animal fats are processed with alcohol (usually methanol) in the presence of a catalyst, creating fatty acid methyl esters, or biodiesel, and glycerine as a by-product.


Biogas, another type of biofuel, is produced by the anaerobic breakdown of organic material by bacteria. This process takes place in anaerobic conditions, for example in special reactors – biogas plants. The resulting biogas, consisting mainly of methane and carbon dioxide, can be used as a fuel to produce heat and electricity.

Availability and cost of biofuels

Biofuels, such as biodiesel, are available at many gas stations and are usually marked with appropriate symbols, such as B7 or E10, depending on the content of biocomponents. The price of biofuel is often lower than traditional fuel, making it an attractive option for consumers, especially in light of rising oil prices, and when government subsidies and economies of scale are involved.

The average price per litre of biofuel in Poland ranges from PLN 2.5 to PLN 2.7. Drivers usually decide to combine biofuel with conventional fuel. An interesting solution used mainly by farmers is  producing biodiesel on their own. All you need is the right amount of rapeseed oil and a few other ingredients.

Advantages and disadvantages of biofuels

The use of biofuels allows us to reduce our dependence on crude oil and the emission of harmful gases. However, there are also disadvantages, such as the potential impact on food prices and engine life. Changes in agricultural production and fuel consumption affect the economy and the environment, and the balance between these aspects is crucial for the sustainable development of biofuels. Will the advantages of biofuels outweigh their disadvantages?

Advantages of biofuels

Biofuels are considered an important step towards the ecological transformation of transport. Below are their key advantages.

  1. Reduced dependence on oil. Switching to biofuels can reduce demand for oil, which contributes to fuel price stability.
  2. Environmental protection. Biofuels contribute to lower carbon dioxide and sulphur emissions, which makes them more environmentally friendly than fossil fuels.
  3. Financial benefits. Lower prices of biodiesel and biogasoline compared to traditional fuels are a financial advantage for drivers.
  4. Supporting agriculture. Using unused grains for energy biomass can have a positive impact on local economies and agriculture.
  5. Income for farmers. Biofuel production provides farmers with additional income and promotes local energy production.
  6. Energy security. Decentralizing energy production can increase energy security by reducing dependence on imports.
  7. Activation of rural areas. The development of biofuel production can contribute to the development and activation of rural areas.

Disadvantages of biofuels

There are no perfect things in this world. Biofuels have certain disadvantages, as outlined below.

  1. Impact on drive units. Biofuels can be harmful to engines, especially those that are not designed for them, leading to damages or shortening their service life.
  2. Less energy efficiency. To travel the same number of kilometres, a larger amount of biofuel may be needed compared to fossil fuel.
  3. Increase in food prices. Energy crops may compete with food production, potentially leading to higher prices.
  4. Risk to biodiversity. Monocultures of energy crops may threaten biodiversity and ecological balance.
  5. Water demand. Intensive cultivation of biofuel crops can require large amounts of water, impacting local water resources.
  6. Degradation of natural habitats. The development of plantations for biofuels may lead to the deforestation and destruction of peat bogs, which in turn releases large amounts of carbon dioxide.
  7. Technical problems. Biofuels may cause technical problems such as clogging filters or deteriorating engine performance.

Summary: what is the future of biofuels?

The share of biofuels in the transportation fuel market is growing, and innovations in production and engine technology may further increase their appeal. However, the future of biofuels will depend on a number of factors, including government regulations, technological advances and changes in consumer perceptions. Earlier forecasts assumed a 10% share of biofuels in the Polish energy market by 2020, which did not happen. However, our civilization is moving inexorably towards environmentally-friendly solutions, so biofuels may play a key role in the global energy mix.

Biofuels – FAQ

1. What are biofuels?

Biofuels are renewable energy sources produced from organic material, so-called biomass. They include different types of fuels that can be used for transport, such as ethanol, biodiesel and biogas.

2. What are the main types of biofuels?

The main types of biofuels are:

  • Ethanol – most often made from corn or sugar cane
  • Biodiesel – produced from vegetable or animal fats through the transesterification process
  • Biogas – produced as a result of anaerobic decomposition of biomass

3. Are biofuels better for the environment than fossil fuels?

Biofuels have the potential to be less harmful to the environment than fossil fuels, thanks to lower carbon dioxide emissions. However, their total environmental impact must take into account the entire life cycle, from production to use.