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Wastewater B License FL Exam Questions and Answers 2024/2025( A+ GRADED 100% VERIFIED).
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Wastewater B License FL Exam Questions and Answers 2024/2025( A+ GRADED 100% VERIFIED).
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Wastewater B License Fl3 Amigos
- ANS F/M, SVI, Current WAS rate
3 M's
- ANS MLSS, MLVSS, MCRT
High Sludge Age =_________ MCRT - ANS High MCRT
High Sludge Age=_______ MLSS - ANS High MLSS
Older Sludge F/M ratio - ANS =< 0.1 lbs/day CBOD : 1lb MLVSS
Young Sludge Bacteria - ANS Amoebas, Flagellates, Swimming ciliates
Old Sludge Bacteria - ANS Nocardia Forms, Rotifers, Nematodes
To reduce F/M Ratio _______ the waste rate - ANS reduce the waste rate
6 Reasons for Filament Bacteria to flourish: - ANS Low F/M RATIO, High MCRT
Low DO
Septic/High Organic Acids
Nutrient imbalance in influent
Low pH
FOG
Successful Biological Nutrient Removal (BNR) need specific environmental conditions - ANS
Air and Water Temperature
pH
Alkalinity
Nutrients
MCRT/SRT
Proper respiratory conditions
Water Temp for BNR - ANS Ideal is 77° - 95° F
Below 59°F inhibit bacteria
Above 104°F kills bacteria
pH for BNR - ANS Ideal is 7.0 to 8.0
Below 6.5 inhibit bacteria
, Below 6.0 kills bacteria
Essential Nutrients for BONE - ANS Carbon, Nitrogen, Phosphorus
DO levels should be - ANS 2 mg/L
Anaerobic Microorganisms are - ANS Methane formers, Sulfate reducing bacteria
Aerobic Microorganisms are - ANS Nitrobacter, Nitrosomonas, Floc formers
Anoxic Conditions - ANS No free DO.
Nitrate or Nitrite is present as a combined oxygen source.
Heterotrophic bacteria - ANS Bacteria that use organic carbon as a source of nutrients.
Protozoa, fungi, and most bacteria fall into this category.
Autotrophic bacteria - ANS Self nourishing bacteria.
Are nitrifiers.
High Chlorine demand caused by - ANS High effluent nitrite
Poor fecal coliform kills caused by - ANS poor chlorine residual
Steps in BNR - ANS 1. Ammonification
2. Nitrification
3. De-nitrification
Ammonification (nitrogen cycle) - ANS Conversion of organic N to ammonia or ammonium
Nitrification (nitrogen cycle) - ANS The biological oxidation of ammonia or ammonium to nitrite
followed by the oxidation of the nitrite to nitrate.
Chemical Supplement for Alkalinity - ANS Sodium hydroxide, Soda ash, Lime, Magnesium
hydroxide
Conditions required for Effective Denitrification - ANS Anoxic environment, Carbon source,
Proper range of pH, temp and SRT
Anoxic Conditions - ANS DO less than 0.2 mg/L preferably zero mg/L
pH range for effective De-nitrification - ANS 7.5 - 9.0
Biological Phosphorus Removal Steps - ANS Anaerobic Zone (release)
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