Biomass: 4th source of renewable energy, which can contribute to the reduction of polluting gases
Updated: Dec 7, 2023
Biomass represents a versatile and environmentally friendly renewable energy source, playing a crucial role in reducing pollution gases, in addition to standing as the fourth most significant renewable energy source today.
Biomass is the most viable option to replace fossil fuel derivatives - Photo Reproduction/Internet
The search for sustainable and renewable energy sources has gained strength in recent years, driven by growing concern about climate change and the need to reduce dependence on fossil fuels. Furthermore, the diversification of the energy matrix has become a pressing need in an increasingly consumerist world. In this context, biomass emerges as a promising alternative, standing out as the fourth most significant source of renewable energy today. Its ability to play a crucial role in mitigating environmental impacts makes it a key player in the transition to a more sustainable future.
Considered a renewable and cheap source of energy generation, biomass is the most viable option to replace fossil fuel derivatives. Its increasing use, however, may result in a more intense deforestation process, in addition to problems regarding its storage and transportation. This energy source is, according to information from the International Energy Agency (IEA), within approximately 20 years around 30% of total energy consumption will come from renewable sources. Currently, according to graph X, renewable energies represent just over 12% of the global matrix, with total biomass accounting for 9.73%.
What is Biomass?
Biomass refers to organic matter originating from plants, agricultural and forestry residues and other biological materials that can be used as a source of energy. Among the main forms of biomass are wood, agricultural waste, food waste, such as rice husks and sugarcane bagasse, even wood waste, urban waste, sewage and even animal carcasses. This variety of sources makes biomass a versatile and sustainable option for energy generation.
Biomass to Energy Conversion Processes
Biomass can be converted into energy through several processes, including:
Combustion: In this process, biomass is burned to generate heat, which can be used directly for heating or converted into electricity using steam turbines.
Gasification: Biomass is transformed into synthesis gas, containing hydrogen and carbon monoxide, which can be used to generate electricity or produce synthetic fuels.
Anaerobic Digestion: Organic waste is decomposed by bacteria in oxygen-free conditions, resulting in the production of methane-rich biogas. This biogas can be used to generate electricity or as fuel.
Biofuel Production: Biomass can be converted into liquid biofuels, such as ethanol and biodiesel, through fermentation and transesterification processes, respectively.
Contribution to the Reduction of Pollutant Gases
The use of biomass as a source of renewable energy presents numerous environmental advantages, contributing to the significant reduction in polluting gas emissions. Unlike fossil fuels, burning biomass releases only carbon dioxide that was previously absorbed by plants during their growth. Furthermore, its use contributes to reducing the volume of solid waste and creating jobs in rural areas and can also be grown sustainably, ensuring a neutral carbon cycle.
Biomass can be used to produce electricity and heat, with the most common form being the burning of biomass in boilers to generate steam, which is used to move turbines that generate electricity. Biomass can also be transformed into liquid biofuels, such as ethanol and biodiesel, which can be used in internal combustion engines. Another advantage of biomass is that it can be used in a decentralized way, that is, energy production can be carried out on a small scale in rural areas, contributing to local development and reducing dependence on large plants. However, the use of biomass as an energy source is not without challenges.
Replacing conventional energy sources with biomass reduces dependence on fossil fuels, reducing emissions of sulfur dioxide, nitrogen oxides and other pollutants associated with burning coal and oil. This transition to a cleaner energy matrix directly contributes to improving air quality and preserving human health.
Challenges and Future Perspectives
Despite the advantages, the large-scale adoption of biomass still faces challenges, such as the limited availability of raw materials in some regions and competition with traditional land uses. However, technological advances and investments in research and development can overcome these obstacles, making biomass a fundamental part of the transition to a more sustainable energy matrix.
