Waste Water and BOD Quiz

• The amount of oxygen required for the decomposition of non-biodegradable organic matter present in waste water
• The amount of oxygen required for the decomposition of inorganic matter present in waste water
• The amount of oxygen required for the decomposition of all matter present in waste water
• The amount of oxygen required for the decomposition of biodegradable organic matter present in waste water (correct)

• BOD5 = (DOi + DOf) × Dilution factor
• BOD5 = (DOi + DOf) / Dilution factor
• BOD5 = (DOi - DOf) / Dilution factor
• BOD5 = (DOi - DOf) × Dilution factor (correct)

• The addition of oxygen to waste water
• The process of removing inorganic matter from waste water
• The process of filtering waste water
• The depletion of DO content or exertion of BOD by microorganisms in waste water (correct)