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Questions and Answers
Which odorous compound is associated with a fishy odour?
Which odorous compound is associated with a fishy odour?
- Ammonia
- Amines (correct)
- Diamines
- Skatole
What odour is linked to hydrogen sulphide?
What odour is linked to hydrogen sulphide?
- Faecal matter
- Ammoniacal
- Skunk
- Rotten eggs (correct)
Which compound has an odour described as decayed cabbage?
Which compound has an odour described as decayed cabbage?
- Amines
- Mercaptans (methyl & ethyl) (correct)
- Organic sulphides
- Diamines
Skatole is known for which type of odour?
Skatole is known for which type of odour?
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Which odorous compound is characterized by an ammoniacal odour?
Which odorous compound is characterized by an ammoniacal odour?
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Study Notes
Odorous Compounds in Raw Wastewater
- Amines: Emit a fishy aroma, commonly related to the decomposition of organic matter.
- Ammonia: Recognized for its strong ammoniacal odor, often a result of the breakdown of nitrogen-containing compounds.
- Diamines: Produce a smell reminiscent of decayed flesh, often arising from protein degradation.
- Hydrogen sulphide: Characterized by a strong rotten egg scent, typically generated by anaerobic decomposition of organic materials.
- Mercaptans:
- Methyl and ethyl mercaptans release a decayed cabbage odor, contributing to unpleasant smells in wastewater.
- T-butyl and crotyl mercaptans are associated with a skunk-like scent, highlighting the varied nature of these compounds.
- Organic sulphides: Create a rotten cabbage smell, indicating the presence of sulphur compounds in the wastewater.
- Skatole (C9H9N): Noted for its faecal matter odor, it is a byproduct of protein breakdown in sewage systems.
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