Question

4. What is biogas? How is it produced?
5. What do you mean by anaerobic degradation?
6. State two advantages and two disadvantages
of biogas.
7. What is solar energy Name any four solar devices.
renewable sources of energy.
1. What are renewable sources of energy? Give any two example
2. Differentiate between renewable and non- renewable sources of energy
3. Define the term 'biomass'.​

Answer 1

Answer:

Biogas is the mixture of gases produced by the breakdown of organic matter in the absence of oxygen, primarily consisting of methane and carbon dioxide. Biogas can be produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste or food waste.

Answer 2

4. Biogas is produced through the processing of various types of organic waste. ... Digestion carried out by these microorganisms creates methane, which can be used as it is locally or upgraded to biogas equivalent to natural gas quality, enabling the transport of the biogas over longer distances.

5. Anaerobic digestion is a sequence of processes by which microorganisms break down biodegradable material in the absence of oxygen. The process is used for industrial or domestic purposes to manage waste or to produce fuels.

6. Advantages of Biogas

1. Biogas is Eco-Friendly
Biogas is a renewable, as well as a clean, source of energy. Gas generated through biodigestion is non-polluting; it actually reduces greenhouse emissions (i.e. reduces the greenhouse effect). No combustion takes place in the process, meaning there is zero emission of greenhouse gasses to the atmosphere; therefore, using gas from waste as a form of energy is actually a great way to combat global warming.

Disadvantages of Biogas



1. Few Technological Advancements
An unfortunate disadvantage of biogas today is that the systems used in the production of biogas are not efficient. There are no new technologies yet to simplify the process and make it abundant and low cost. This means large scale production to supply for a large population is still not possible. Although the biogas plants available today are able to meet some energy needs, many governments are not willing to invest in the sector.

7. Solar energy is radiant light and heat from the Sun that is harnessed using a range of ever-evolving technologies such as solar heating, photovoltaics, solar thermal energy, solar architecture, molten salt power plants and artificial photosynthesis.

Solar Lights. ...
Solar Fans. ...
Solar Generators. ...
Solar Transportation. ...
Solar wearables and consumables