Apedia Logo Apedia
Join

Choose Language

Select your preferred reading language
🇬🇧
English
✔
🇮🇳
हिन्दी
✔
✕
Full View
Environment
Aquaculture
EN हिंदी
✕
UPSC Prelims 2023 Paper-1 📅 28 May, 2023

With reference to the role of biofilters in Recirculating Aquaculture System, consider the following statements:
  • 1. Biofilters provide waste treatment by removing uneaten fish feed.
  • 2. Biofilters convert ammonia present in fish waste to nitrate.
  • 3. Biofilters increase phosphorus as nutrient for fish in water.
How many of the statements given above are correct?

A
Only one
B
Only two
C
All three
D
None
Result Summary
Logo

APEDIA

UPSC Prelims
2023 • 28 May, 2023 • Paper-1
With reference to the role of biofilters in Recirculating Aquaculture System, consider the following statements:
  • 1. Biofilters provide waste treatment by removing uneaten fish feed.
  • 2. Biofilters convert ammonia present in fish waste to nitrate.
  • 3. Biofilters increase phosphorus as nutrient for fish in water.
How many of the statements given above are correct?
Correct Answer
Only one
Subject: Environment.Context: Sustainable Agriculture Techniques.Details: Statement 1 is incorrect; solid wastes like uneaten feed are primarily removed by phys......
Ref/Book : UPSC Prelims 2023
Ref. Subject Environment
Chapter -
Ref. Topic Aquaculture
Pg. No -
💡 Analysis & Explanation
Subject ▼
Environment.
Context ▼
Sustainable Agriculture Techniques.
Details ▼
Statement 1 is incorrect; solid wastes like uneaten feed are primarily removed by physical/mechanical filters (like drum filters), not biofilters. Statement 2 is correct; the core biological function of a biofilter is nitrification, where bacteria convert highly toxic ammonia (from fish waste) into less toxic nitrate. Statement 3 is incorrect; biofilters do not generate or increase phosphorus for the fish. Thus, only one statement is correct.
← Prev
55 / 100
Next →