Biomass refers to organic materials derived from living or recently living organisms, primarily plants and animals. These materials store energy harnessed from the sun through photosynthesis, making biomass a renewable energy source.
When utilized, biomass can be burned directly for heat or converted into biofuels such as ethanol, biodiesel, and biogas. Additionally, it can be used to generate electricity and provide heating.
Types of biomass
Contents / Index
Plant-based Biomass : Includes wood, energy crops like switchgrass, agricultural residues, and algae.
Animal-based Biomass : Comprises animal waste and fats.
Organic Waste : Encompasses municipal solid waste, industrial waste, and sewage.
Factors affecting biomass accumulation
Sunlight : More sunlight means plants can carry out more photosynthesis, increasing biomass.
Climate : Warmer, wetter climates usually allow more plant growth compared to dry or cold climates.
Soil Quality : Rich soil provides nutrients that help plants grow faster and healthier.
Water Availability : Sufficient water supports healthy plant growth, thus increasing biomass accumulation.
Human Activities : Farming, forestry, waste management, and urbanization affect how much biomass is available.
Biomass energy in India
Biomass energy, derived from organic materials such as plants and animal waste, plays a pivotal role in the energy landscape of many developing nations, including India.
Abundant Agricultural Residues : India's agrarian economy generates substantial agricultural residues, including crop stalks, husks, and other byproducts. These materials serve as valuable feedstock for biomass energy production, offering a sustainable alternative to traditional fossil fuels.
Biomass is inherently renewable : Unlike fossil fuels that require millions of years to form, biomass resources can be replenished annually through proper management.
Mitigation of Crop Residue Burning : In regions like Punjab and Haryana, the practice of burning crop residues contributes significantly to air pollution.
Rural Employment Opportunities : in rural areas by involving communities in the collection, transportation, and processing of biomass materials.
Reduction of Carbon Footprint
Source-review note: “Reduction of Carbon Footprint” is an undeveloped point in the original. No new explanation or quantified benefit has been supplied.
By harnessing locally available biomass resources, India can reduce its dependence on imported fossil fuels, enhancing energy security and improving the trade balance.
Disadvantages
Disadvantages : Unsustainable harvesting can lead to deforestation and habitat loss. Burning biomass releases carbon dioxide and other pollutants, potentially impacting air quality.
Questions from the chapter
Why do we consider biomass as source of energy in developing countries like India? [UKPSC Forest (ACF) 2019, Environmental Science Optional, 15 M].
Exam attributions are reproduced from the supplied notes; unattributed questions remain unattributed.
Chapter 6 reading order
- Energy Flow in Ecosystems: Processes and Thermodynamic Laws
- Energy Flow Models: Single Channel, Y Shaped and Universal
- Biomass: Types, Accumulation and Energy Uses in India
- Ecosystem Productivity: Primary, Secondary and Influencing Factors
- Methods of Measuring Primary Productivity
- Primary Productivity Patterns in Terrestrial and Aquatic Ecosystems