Activated Sludge
Sludge age is determined:
MCRT
Capacity of water to neutralize acids to a PH of at least 4.5
Alkalinity
What is the acronym to remember the order from largest to smallest filter rates?
MUNRO
What can be in the effluent that causes fish kills?
Oxygen deficiency and ammonia toxicity
As temperature increases what happens to bug activity
Increase
Correct order for SBR
Fill, react, settle and decant
Anaerobic digesters should not exceed ___ degrees per day.
1
What is Flux?
Flow
What can nitrates cause in potable water?
Methelglobanemia
Size of BOD bottle
300 mL
First way to correct a sour digester
stop feeding
This measures the hydrogen ion activity in wastewater.
PH
Which membrane will remove a virus?
Ultra
What do you leave out for total inorganic nitrogen?
Organics
Small finely divided solids
colloids
Indicator bugs for old sludge
Nematodes and Rotifers
Percentage range of methane gas produced during anaerobic digestion.
65-70%
How much water can you expect to reject from RO system?
50%
What contributes to most of the nitrogen in waste treatment plants?
Urine
what does a pneumatic ejector utilize to move water
air compressor
Most common filament but most difficult to get rid of
Nocardia
What type of bacteria breakdown complex solids to volatile acids?
Saprophytic Bacteria
Which removes salts AND sugars?
RO
Nitrosomonas bacteria convert:
Ammonia to nitrite
What type of pump would be damaged if started against a closed discharge valve?
Positive displacement pump