Advertisements
Advertisements
प्रश्न
Which fuels can be obtained by microbial processes? Why is it necessary to increase the use of such fuels?
Name two fuels obtained by microbial processes. Why is it necessary to increase the use of such fuels?
उत्तर
There are different kinds of fuel that can be produced with the help of microbes. Some of the examples of such fuels are:
- Ethanol: It is a byproduct that is produced during fermentation of molasses by Saccharomyces. It is a type of alcohol and is a clean (smokeless) fuel. It is mixed with petrol and diesel to prevent vehicular emissions.
- Methane: Methane is a gaseous fuel that is obtained by microbial anaerobic decomposition of urban, agricultural, and industrial waste.
- Hydrogen fuel: Hydrogen is released during the bio-photolysis of water, in which bacteria perform photoreduction. It is considered the fuel of the future as it is non-polluting and an efficient fuel.
Fuels obtained from fossil sources are non-renewable and polluting. In contrast, fuels such as hydrogen, ethanol, and methane represent the future of energy because they burn cleaner, offer comparable efficiency, and are renewable. Therefore, their use should be further promoted.
संबंधित प्रश्न
“Solving the problem of pollution is an effective way of environmental management” Justify the statement.
Which are the reasons for increasing the popularity of probiotic products?
Give scientific reasons.
Microbial enzymes are used instead of chemical catalysts in chemical industry.
Give reasons.
Soil is turned over during tilling.
Give reasons.
Bread 'rises' during baking.
Nowadays, ___________ are used for treatment of diarrhoea and treatment of poultry also.
Find an odd one out.
A clean (smokeless) fuel.
Lactic acid : To impart acidity : : Beta carotene : _____________________
Gaseous fuel : Coal gas : : ___________ : Coal
Which microbes convert uranium to its insoluble salts?
Write a short note.
Bio-fuels
How are microbes useful in land filling for solid waste management?
Briefly explain the environmental role of microorganisms in pollution control?
Explain biofuel production with the help of diagram.
Observe the figure and write the answers to the questions asked.
- Write the name of the fungus in the figure above.
- What is the source of these fungi?
- Which organic acid obtained from this organism is used in commercial production?
Write the answers to the questions by observing the figure.
- What type of fuel production process is shown in the figure?
- Write two examples of each of the solid, liquid and gaseous fuels produced in this fuel production process?
- How do microorganisms play their role in this process?
Complete the chart on production of beverages.
| S. No. | Fruit | Microbe used | Role of microbe used | Name of beverage |
| (a) | Caffea arabica | ______ | Separating seeds from fruit | Coffee |
| (b) | Theobroma cacao | Candida, Hansenula, Pichia, Saccharomyces | ______ | Cocoa |
The figure below shows a concept of segregation, observe the following figure and answer the questions that follow:
- What is dry and wet waste?
- Why do we need to segregate our garbage?
