(1) Organic pollution - Biochemical Oxygen Demand (BOD): - Definition: The amount of dissolved molecular oxygen required by aerobic microorganisms to biochemically decompose and stabilize biodegradable organic matter in a unit volume of water at 20°C over 5 days (BOD₅). - Environmental Significance: BOD serves as the standard quantitative measure of organic pollution in domestic sewage, industrial wastewater, and aquatic ecosystems. High BOD depletes dissolved oxygen, causing aquatic hypoxia and fish mortality. - Correct Option: Option 1 (Organic pollution).

Fish Biochemistry अभ्यास प्रश्न (Q3) - Fish Processing Technology

ICAR JRF Fish Processing Technology 29 Jun 2024Shift 1

MCQ (Single Correct) +4 −1

BOD is a measure of-

Organic pollution Correct Biological pollution Inorganic pollution Physical pollution

Biochemical Oxygen Demand (BOD):
Definition: The amount of dissolved molecular oxygen required by aerobic microorganisms to biochemically decompose and stabilize biodegradable organic matter in a unit volume of water at $20^\circ\text{C}$ over 5 days ($\text{BOD}_5$).
Environmental Significance: BOD serves as the standard quantitative measure of organic pollution in domestic sewage, industrial wastewater, and aquatic ecosystems. High BOD depletes dissolved oxygen, causing aquatic hypoxia and fish mortality.
Correct Option: Option 1 (Organic pollution).

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