16 Questions
What is the primary role of recycling in waste management?
To convert waste materials into new materials and objects
What is the key role of bacteria and other microbes in waste recycling?
Biodegradation of organic materials and nutrient recycling
How does recycling contribute to environmental sustainability?
By preventing the waste of potentially useful materials
In what way are microbes essential to waste recycling?
Fermentation stages of waste recycling
What do bacteria and other microbes do in marine ecosystems?
Biodegradation of oil
Under what conditions is ammonia further oxidized to nitrate?
Aerobic conditions
What are phosphate and sulphate oxidized to in organic substances?
Phosphate and sulphate
What is the main gaseous by-product of anaerobic conversion?
Methane
What is the product mainly produced from the conversion reactions of organic wastes for food by microorganisms?
Cellular material of micro-organisms
What does the growth yield depend on?
The type of substrate and environmental conditions
What is the main role of microbes in biodegradation?
Recycle nutrients by decomposing organic materials
What is the major component of natural gas produced by microbes during degradation of organic materials?
Methane gas
Which process results in the liberation of carbon dioxide in dough making bread rise?
Fermentation
What is the microorganism Aspergillus carbonarius used for in waste recycling?
Biodegradation of chromium shavings
What do natural biodegradation and fermentation have in common?
Both involve the use of microbes to decompose organic materials
What does microbial fermentation result in when degrading brewery waste and organic materials?
Production of methane gas
Test your knowledge about the process of converting waste materials into new materials and objects. Learn about how recycling can help save material, lower greenhouse gas emissions, and reduce energy and water pollution. Explore the key components of recycling in this quiz.
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