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Microbes in Production of Biogas Video Lecture - NEET

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FAQs on Microbes in Production of Biogas Video Lecture - NEET

1. What are the main microbes involved in the production of biogas?
Ans. The main microbes involved in the production of biogas are bacteria and archaea. Bacteria, such as Methanobacterium and Methanosarcina, play a vital role in the anaerobic digestion process by converting organic matter into methane gas. Archaea, specifically methanogens, are responsible for the final step in biogas production, where they produce methane as a byproduct of their metabolic activities.
2. How do microbes contribute to the production of biogas?
Ans. Microbes contribute to the production of biogas through a process called anaerobic digestion. During this process, bacteria and archaea break down organic matter in the absence of oxygen, converting it into biogas. Bacteria decompose complex organic compounds into simpler compounds, and then methanogens convert these compounds into methane gas. The metabolic activities of these microbes play a crucial role in the breakdown of organic material and the generation of biogas.
3. What factors influence the activity of microbes in biogas production?
Ans. Several factors influence the activity of microbes in biogas production. Temperature is a critical factor as it affects the growth and activity of microbes. Different groups of microbes have specific temperature ranges within which they thrive. pH levels also play a significant role, as most microbes involved in biogas production prefer a slightly acidic environment. The availability of nutrients, substrate composition, and retention time of the organic matter in the anaerobic digester are other factors that influence microbial activity.
4. Can the presence of harmful microbes affect biogas production?
Ans. Yes, the presence of harmful microbes can affect biogas production. Some harmful microbes, such as sulfide-producing bacteria, can produce hydrogen sulfide gas, which is toxic and can inhibit the activity of methanogens. This can reduce the overall methane production and affect the efficiency of biogas generation. It is important to maintain proper operating conditions and control the microbial community to ensure optimal biogas production and minimize the presence of harmful microbes.
5. How can the microbial community be controlled in biogas production?
Ans. The microbial community in biogas production can be controlled through various strategies. One approach is to maintain optimal operating conditions, such as temperature and pH, to favor the growth of desired microbes. This can be achieved through regular monitoring and adjustments. Another method is to use specific inoculants or microbial additives that introduce beneficial microbes to the digester, enhancing the overall biogas production. Additionally, proper management of substrate composition, retention time, and digester mixing can help control the microbial community and promote efficient biogas production.
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