Chemistry
What is the natural attraction force between particles called?
Van Der Waals forces
How long is the typical BOD test?
5 Days
As water temperatures increase, what happens to DO?
DO decreases
As_____ increases reaction rate and settling rates increase.
Temperature
How do we calculate bug age?
SRT (MCRT)
What is the main objective of primary treatment?
Remove suspended solids
Which natural electrical force keeps colloidal particles apart in water treatment?
Zeta Potential
Name a type of protozoa you would see that would indicate an older sludge?
Rotifer, water bear, nematode, etc.
What is the primary reason for the center well of a clarifier?
Disipate velocity (energy)
Name the equipment required for a TSS test?
Glass fiber filters, vacuum filter, pipette or graduated cylinder, scale, oven
Name two conditions that may favor filamentous bacteria growth?
Low DO, low F:M, low nutrients
Samples collected over several hours during the day and combined are known as _ samples.
Composite
What concentration should emulsion flocculants be made down to?
0.5-2%
Protozoa that must be removed from raw water are?
Giardia and Cryptosporidium
What is the difference between MLSS and MLVSS?
Inorganic solids