What is the main constituent of biogas?how is biogas obtained from biomass? write any two advantage of using this gas?

Question

Answer

Biogas main constituent is metane that is 73 % of biogas
biogas is obtained from biomass by the degradation of organic substance under biogas plant

two advantage of using biogas is
1) it produces much amount of heat when burnt it has more calorific value
2) it leaves no residue

Answer

Which among the following is the main constituent of Biogas? Biogas comprises primarilymethane (CH4) and carbon dioxide (CO2) and may have small amounts ofhydrogen sulphide (H2S), moisture and siloxanes.

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Answer

Biogas is made up of a mixture of natural gases such as methane

Answer

The main constituent of biogas is methane (CH4), which typically makes up around 50-75% of its composition. Biogas is obtained through the process of anaerobic digestion, which involves the decomposition of organic matter by bacteria in the absence of oxygen. This organic matter, also known as biomass, can include various types of waste such as agricultural residues, animal manure, sewage sludge, food waste, and energy crops.

Anaerobic Digestion Process:
1. Collection and Preparation of Biomass: The biomass is collected and prepared, which may involve grinding, mixing, or shredding depending on its composition. This process helps in breaking down the biomass into smaller particles, increasing its surface area for better digestion.

2. Loading and Digestion: The biomass is loaded into a sealed anaerobic digester, which can be a covered lagoon, airtight tank, or a specialized container. The absence of oxygen creates an ideal environment for anaerobic bacteria to thrive and decompose the biomass. The bacteria break down the complex organic compounds into simpler substances through a series of biochemical reactions, ultimately producing biogas.

3. Biogas Collection: The biogas produced during the anaerobic digestion process is collected and stored in a gas holder or a storage tank. It can be utilized directly for various purposes or further processed to remove impurities and increase its energy content.

Advantages of Biogas:
1. Renewable and Environmentally Friendly: Biogas is a renewable source of energy as it is derived from organic waste materials that are constantly generated. By utilizing these waste materials for biogas production, it helps reduce their environmental impact and contributes to waste management. Biogas also has a lower carbon footprint compared to fossil fuels, as it is a result of the natural carbon cycle.

2. Energy Generation and Heat Production: Biogas can be used for electricity generation in gas engines or turbines, providing a reliable and sustainable source of power. It can also be utilized for heat production through combined heat and power (CHP) systems, where the waste heat from electricity generation is recovered and used for various heating applications. This makes biogas a versatile energy source that can be used for both electricity and heat production.

In conclusion, biogas is primarily composed of methane and is obtained through the anaerobic digestion process of biomass. It offers several advantages, including its renewable nature, environmental friendliness, and its ability to generate both electricity and heat. By harnessing the potential of biogas, we can reduce waste, lower greenhouse gas emissions, and contribute to a more sustainable energy future.

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