True and False -2 Flashcards
Short detention times are normal for package plants
F
One advantage of the extended aeration treatment method is it is not necessary to waste sludge
F
Package plants should be operated with a detention time between 1 and 3
F
An activated sludge plant with an MCRT of over 10 days, is normally considered an extended aeration plant
T
One way to determine the RAS flow rate is to monitor the secondary clarifier sludge blanket depth
T
The sludge volume index (SVI) is a calculation used to determine aerobic sludge digester available space
F
The minimum activated sludge basin DO is 2 mg/L
T
The conventional, complete mix, or step feed activated sludge plant can be operated with pure oxygen
T
The RAS flow rate is dependent upon sludge settling rate
T
When using the F/M ratio to calculate WAS rate, the MCRt must be known to complete the calculation
T
Microorganisms in a biological treatment process require soluble nutrients
T
If the photosynthesis process is not occurring in a facultative wastewater treatment plant, you are headed for trouble
T
By definition, a facultative wastewater treatment pond may have dissolved oxygen throughout the pond
F
One advantage of sulfur dioxide is that it is not dangerous to human health
F
Sulfur dioxide is lighter than air. If a sulfur dioxide leak occurs you should seek low ground
F
