Young Sludge Bacteria - ANSWER Amoebas, Flagellates, Swimming ciliates
Old Sludge Bacteria - ANSWER Nocardioforms, Rotifers, Nematodes
To reduce F/M Ratio _______ the waste rate - ANSWER reduce the waste rate
6 Reasons for Filament Bacteria to flourish: - ANSWER 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 -
ANSWER Air and Water Temperature
pH
Alkalinity
Nutrients
MCRT/SRT
Proper respiratory conditions
Water Temp for BNR - ANSWER Ideal is 77° - 95° F
Below 59°F inhibit bacteria
Above 104°F kills bacteria
pH for BNR - ANSWER Ideal is 7.0 to 8.0
Below 6.5 inhibit bacteria
Below 6.0 kills bacteria
, Essential Nutrients for BNR - ANSWER Carbon, Nitrogen, Phosphorus
DO levels should be - ANSWER 2 mg/L
Anaerobic Microorganisms are - ANSWER Methane formers, Sulfate reducing bacteria
Mudballs are clumps of........ - ANSWER Filter media and other material
To prevent chlorine icing - ANSWER Manifold several cylinders together
VA:ALK ratio anaerobic digester - ANSWER 0.1 : 1.0
Cleaning schedule for anaerobic digester is - ANSWER 3 to 8 years
By-product of nitrification is - ANSWER Nitric acid
7.1 lbs of ALK for every _____ lb of ammonia oxidized. - ANSWER 1.0 lb
Biological removal of phosphorus is known as - ANSWER luxury uptake using
facultative heterotrophs PAOs
Chemical removal of phosphorus is done with - ANSWER metal salt
coagulation/flocculation
Measuring water pressure above & below filter media determines - ANSWER Head
Loss
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